JP2003034762A - Method for toning of coating having lustrous shining - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for toning of the coating having lustrous shining in which those who carry out tonig with little experience in the toning can also mach color with high accuracy. SOLUTION: The method for toning of the coating having lustrousness uses a computer color-matching device composed of (A) a colorimeter, (B) a group of color charts in which sample color charts corresponding to the coating-color operation numbers are collected, and (C) a computer for operating color- matching calculation logic. The method comprises the steps of (1) measuring the reference color for matching the color of the coating by toning with the colorimeter to obtain color data of the reference color, (2) comprising the color data of the reference color with the color data corresponding to the coating formulation registered in the computer in advance and selecting similar coating formulation by changing the degree of the color matching into indices to obtain a corresponding sample color chart, and (3) comparing the lustrousness of the sample chart with that of the reference color visually.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a colorimeter, a sample color chart, and a method of color-adjusting a paint having a brilliant feel using a computer color-matching device.

[0002]

2. Description of the Related Art A computer-aided color matching system is disclosed in, for example, US Pat. No. 3,601,589.
Are known as described in the specification. In the U.S. patent, the total spectral reflectance of an unknown color panel is determined by a scanning spectrophotometer and this reflectance data is sent to a computer, which in turn reports the K value of the pigment (indicating the "light absorption coefficient") and A method of mathematically processing pre-stored data representing an S value (indicating "light scattering coefficient") to perform logical color matching is disclosed.

The disclosure content of the above US patent is basically
It relates to a series of calculation procedures. That is, according to this calculation procedure, the K value and the S value can be calculated for one spectral wavelength, and further, one set of pigments has the K and S values of the combination of the pigments as described above. It can be determined to be equal to the K and S values of the unknown color for each spectral wavelength. This is the basic color matching algorithm also used in other spectrophotometric color matching systems.

The problem with the system according to the above US patent is that
Firstly, it is very expensive and difficult to maintain, and secondly, logical color matching is performed using the data obtained for known pigments of unknown color. That is, the final color obtained by mixing the pigments according to the calculated color value may be different from the unknown color. Therefore, the color matching formula is usually a first-order mathematical approximation method that requires system correction and adjustment.

To improve the above system, for example,
In Japanese Patent Laid-Open No. 63-153677, a portable color meter is used to analyze a selected color, and color data representing hue, saturation, and lightness of the selected color are stored, and the color data in the color meter is stored. A color that is connected to a computer and that stores a plurality of available color formulas (paint formulations) in the computer, and that represents the hue, saturation, and lightness of each paint specified by the stored available color formula. Storing data in the computer and comparing the color data of the selected color received from the color meter with the stored color data representing each of the stored available color formulas to find the closest match. Select a stored color formula represented by the color data found as the closest match, thereby matching the color to the selected color. The methods and apparatus have been proposed to carry out.

Further, in recent years, as for the coating color of automobiles, the coating color with a brilliant feel in which aluminum powder or glittering mica powder is blended is increasing from the viewpoints of diversification of personal preference and improvement of beauty. . In the case of performing color matching in the repair coating of this glittering coating color, the above-mentioned JP-A-63-15367 is used.
In the color matching method described in Japanese Patent Publication No. 7, the color matching accuracy is not yet sufficient, and there has been no color matching method with high accuracy by a computer for a coating color having a glittering feeling.

Furthermore, there is a problem in that a paint color having a brilliance is difficult for a color adjuster with little experience. In addition, even a toned person who has a lot of experience has a problem that when performing color matching between the sample board and the color-finished coating board, it depends on the weather and the evaluation varies depending on the person who evaluates.

Further, since it is impossible to measure the glittering feeling separately with a commercially available colorimeter, the glittering feeling (for example, the eyes of aluminum, that is, the grainy feeling or the glittering texture of aluminum) is obtained even if the colors match. Often it didn't fit.

An object of the present invention is to achieve accurate color matching even for a paint color having a brilliant feeling, and even an inexperienced color adjuster can easily perform color adjustment, and color adjustment that is not affected by the weather. Is to provide a method.

[0010]

The present inventors have made a computer comprising a colorimeter, a sample color chart, and a computer in which various paint formulations, paint color data, etc. are inputted and a color matching calculation logic operates. The inventors have found that the above object can be achieved by using a color matching device, and completed the present invention.

That is, the present invention comprises (A) a colorimeter,
(B) A group of color charts in which sample color charts corresponding to painting color work numbers are gathered, (C) a plurality of paint formulations, color data and glitter data corresponding to each paint formulation, and color characteristics of a plurality of primary color paints The following (1) to (3) are used by using a computer toning device, in which data and glitter characteristic data are registered, and a computer that operates a color matching calculation logic using the paint composition and each data. Step (3): (1) a step of obtaining a color data of the reference color by measuring a reference color with which the coating color of the paint is to be matched by a colorimeter, and (2) the color data of the reference color in advance. A step of comparing the color data corresponding to the paint composition registered in the computer, indexing the degree of color matching to select an approximate paint composition, and obtaining a sample color chart corresponding to the selected approximate paint composition, ( 3) The sample color chart and the base obtained in the above step (2) To provide a method for toning a paint having a brilliant feeling (hereinafter sometimes referred to as a "first toning method"), characterized by performing a step of visually comparing a brilliant feeling with a color. is there.

Further, the present invention provides, after the above step (3),
(4) Brightness data corrected based on the difference in brightness between the sample color chart and the reference color based on the above step (3) is input to a computer toning device, and the approximate paint composition is color matching calculation logic. And a method of obtaining a candidate paint composition that is close to a reference color by using the above method.

The present invention further provides (5) a toning-finished coated plate obtained by applying a toning-processed coating based on the candidate coating composition obtained in the above step (4) to obtain a toned-processed coated plate. A step of determining whether or not the paint color is within the acceptable range of the reference color,
The present invention provides the above-mentioned color-matching method.

Further, in the present invention, in the above step (5), when the coating color of the toned coating plate is out of the acceptable range of the reference color,
(6) When the colorimetric data of the paint color of the toned coating plate is input to the computer toning device, and the paint color of the toned coating plate and the reference color have a difference in brilliance. Is a step of inputting the degree of difference in brilliance into a computer toning device and using a color matching calculation logic to obtain a correction mixture for making it closer to the reference color. (7) Obtained in step (6) above. To obtain a toning-processed coated plate by applying a toned-processed paint based on the correction composition, and performing a step of determining whether or not the coating color of the toned-processed coated plate is within the acceptable range of the reference color, It is intended to provide the above-mentioned toning method, which is characterized in that the above steps (6) and (7) are repeated until the judgment is acceptable.

Further, according to the present invention, (A) a colorimeter, and (B) a color chart group in which sample color charts corresponding to painting color work numbers are collected,
(C) a plurality of color numbers, paint formulations corresponding to the color numbers,
Color data and glitter data corresponding to each paint composition, color characteristic data and glitter property data of a plurality of primary color paints are registered, and a color matching calculation logic using the paint composition and each data operates. Using a computer toning device including a computer, the following (8)-
Step (8): (8) A step of obtaining the color data of the reference color by measuring the reference color with which the coating color of the paint should be matched by a colorimeter, and (9) the same color as the reference color number. Comparing the color data of the paint composition registered in advance in the computer corresponding to at least one paint color work number belonging to the number and the color data of the reference color,
Select the approximate paint formulation by indexing the degree of color matching,
The steps of obtaining a sample color chart corresponding to the selected approximate paint composition, and (10) visually comparing the glitter feeling of the sample color chart obtained in the above step (9) with the reference color The present invention provides a method for adjusting the color of a paint having a brilliant feeling (hereinafter sometimes referred to as "second color adjusting method").

Further, according to the present invention, (11) the glitter data corrected on the basis of the degree of difference in glitter between the sample color chart and the reference color based on the above step (10) is input to a computer toning device,
The above-mentioned toning method is characterized in that the step of correcting the approximate paint composition using a color matching calculation logic to obtain a candidate paint composition that is close to the reference color.

Further, according to the present invention, (12) a toning-processed coating based on the candidate coating composition obtained in the above step (11) is applied to obtain a toned-processed coated plate, and the toned-processed coated plate is coated. And a step of determining whether or not the color is within a pass range of the reference color.

The present invention further provides (13) a colorimeter for measuring the coating color of a toned coating plate when the coating color of the toned coating plate is outside the range of acceptance of the reference color. Input the colorimetric data by the computer to the computer toning device, and if the coating color and the reference color of the toning progress coating plate have a difference in brilliance, input the degree of difference in brilliance to the computer toning device. And (14) the above step (13) to obtain a correction mixture for making the color closer to the reference color using the color matching calculation logic.
A step of applying a toning-processed paint based on the correction composition obtained in to obtain a toned-processed coated plate, and determining whether or not the coating color of the toned-processed coated plate is within the acceptable range of the reference color. And the above steps (13) and (14) are repeated until the judgment is acceptable. Hereinafter, the color matching method of the present invention will be described in detail.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The color-matching method of the present invention is a method for preparing a coating having a glittering feeling capable of forming a glittering coating film, using a colorimeter (A) described later,
This is a method of adjusting colors using a computer (C) on which a sample color chart (B) and a color matching calculation logic operate.

Examples of the above-mentioned paint having a brilliant sensation include flaky aluminum powder, vapor-deposited aluminum powder, colored aluminum powder, mica-like iron oxide, mica powder,
Metallic oxide-coated mica powder, metallic oxide-coated silica flakes, glittering pigments such as glittering graphite, and glittering powders such as metal powders such as copper powder that have an interference effect, and coloring pigments as necessary You can list the paints that do.

Colorimeter (A) The colorimeter (A) is a device for measuring the color of a coating film to obtain color data of the coating film. Known colorimeters can be used.

As the colorimeter, a multi-angle colorimeter having a multi-angle measurement angle is suitable. In a multi-angle colorimeter,
The measurement is performed under two or more angle conditions, usually 2 to 4 angle conditions, that is, two or more conditions in which the incident angle of the measurement light is different or the light receiving angle which is the angle formed by the specular reflection axis and the light receiving axis is different. . The specular reflection axis is an axis that forms a reflection angle when the incident angle and the reflection angle are the same angle, for example, when the incident angle is 45 degrees, the reflection angle is 45 degrees.

When the light receiving angle is changed, the angle condition is not particularly limited, but normally the angle condition is 2.
In the case of, the light receiving angle is 15 to 30 degrees and 75 to 1
In the case of each one in each of the angle ranges of 10 degrees, and when the angle condition is 3, the light receiving angle is 15 to 3
When each angle range is 0 degree, 35 to 60 degrees, and 75 to 110 degrees, and the angle condition is 4, the light receiving angle is 15 to 30 degrees, 35 to 60 degrees. ,
It is preferable that each of the angle ranges of 70 to 80 degrees and 90 to 110 degrees is one because it is easy to correspond to the visual color determination.

Each measurement value (angle reference measurement value) obtained by measuring the color of the coating film under each angle condition may be any value that can specify the color, such as expressing or calculating brightness, saturation, and hue, For example, XYZ color system (X, Y, Z), L * a *
b * color system (L *, a *, b * value), Hunter Lab color system (L, a, b value), L * C * h color system (L *) defined by CIE (1994) Value, C * value, h value), Munsell color system (H, V, C) and the like. Above all, the display by the L * a * b * color system or the L * C * h color system is general in the color display in the industrial field including the automobile repair coating field.

Color chart group (B) The color chart group (B) is a collection of sample color charts representing the paint colors of the color numbers designated by the manufacturer. Although it is possible to have one paint composition for one color number, actual paint compositions can be included, and usually multiple paint compositions are registered. Color work number is set.

As a concrete example of the color chart group (B), in the field of repair coating of automobiles, for example, the coating color of automobiles in Japan and overseas corresponds to each painting work number by year, by automobile manufacturer, etc. Examples include booklets and cards containing sample color charts. It is convenient to make the sample color charts with the same painting number and the same painting number easy to see for comparison. For example, it is preferable that one sheet be provided with sample color chips corresponding to a plurality of coating color work numbers corresponding to one or more actual paint formulations having the same color number.

A computer in which the color matching calculation logic operates.
The computer (C) has a plurality of paint formulations, color data and glitter data corresponding to each paint formulation, color characteristic data and glitter characteristic data of a plurality of primary color paints, and, if necessary, , A plurality of color numbers and paint compositions corresponding to the color numbers are registered, and the computer (C) operates a color matching calculation logic using the paint compositions and the data. Further, the glitter data of the color number or the color name may be registered as necessary, and the glitter data corresponding to the color number or the color name may be extracted.

The color data corresponding to each paint composition registered in the computer can be colorimetric data of a coating film obtained from each paint by a multi-angle colorimeter.

The glittering feeling means a unique glittering texture which appears in a coating color containing a glittering pigment such as aluminum powder and glittering mica powder. For example, aluminum, mica, etc., graininess, rough texture, particle size and glare,
Glittering sparkles, etc. are applicable.

The glitter data or the glitter characteristic data registered in the computer is, for example, illuminated on the surface of the glitter coating, and the reflected light based on it is illuminated at an angle at which regular reflected light does not enter. The coating surface that is
It may be data obtained by analyzing an image captured by a ge couple device) camera.

The images taken by the CCD camera are two-dimensional images, and a large number (usually 10,000 to 1,000,
(000) sections (pixels, picture elements), and the luminance in each section is measured. In the present invention,
The "brightness" means "a digital gradation indicating a gray value of each section of a two-dimensional image obtained by photographing with a CCD camera, and a digital amount corresponding to the brightness of a subject". The digital gradation, which indicates the brightness of each section output from the CCD camera with 8-bit resolution, has a value of 0 to 255.

In the two-dimensional image photographed by the CCD camera, the section corresponding to the portion where the reflected light of the glittering pigment is strong has a high glittering feeling, and thus the luminance is high. Get lower. Even in a section corresponding to a portion where the reflected light of the bright pigment is strong, the brightness changes depending on the size, shape, angle, material, etc. of the bright pigment. Brightness can be displayed for each nail section,
In the present invention, the CCD is based on the brightness in each section.
It is possible to display the brightness distribution of a two-dimensional image captured by a camera in three dimensions. This three-dimensional distribution map of brightness is
It is divided into mountains, valleys, and flat areas, and the height and size of the mountains indicate the degree of brilliance due to the luster pigment. The higher the mountains, the greater the brilliance. It has no or little feeling, and mainly shows reflection of light by the coloring pigment or the substrate.

The image taken by the CCD camera can be analyzed by an image analysis device connected to the CCD camera. The image analysis software used in this image analysis apparatus is, for example, “Mac” by Mitani Corporation.
"SCOPE" (trade name) and the like are suitable.

In the image analysis, for example, "glitter" (perception of irregular fine brilliance caused by light specularly reflected from the glittering pigment in the coating film) and "particle feeling" (glitter as much as possible) When the sample is observed under lighting conditions where it is difficult to develop, the irregularity and the non-directional pattern (random pattern) that occur due to the orientation and overlap of the bright pigment in the bright material-containing coating are separated from each other. It is preferable to make a quantitative evaluation because the variation due to individual difference is small.

The color characteristic data of the primary color paint registered in the computer may be, for example, the K value (light absorption coefficient) or S value (light scattering coefficient) of the primary color paint. The K value and the S value can be obtained, for example, by numerically processing the primary color paint and the colorimetric data of the light color of the primary color paint.

The above-mentioned color number registered in the computer as needed is usually a color code number designated by each manufacturer of coated articles, and the paint composition at the time of repair coating is determined according to the color number. It is registered. This paint formulation can be one for one color number,
Actual paint formulations can also be included, and usually multiple paint formulations are registered. For each of these paint formulations,
The colorimetric data of the formed coating film by the multi-angle colorimeter and the paint work number are also registered in advance in the computer.

The computer toning method of the present invention includes a first toning method that does not include a step of selecting a paint composition from the same color number using the color number, and the same color using the color number. The second which has the process of selecting the paint formulation from the numbers
There are two aspects of the color matching method of.

First, the first color matching method will be described in order based on each step. Step (1) Step (1) is a step of obtaining the color data of the reference color by measuring the reference color coating film to which the coating color of the paint is to be adjusted by toning with the colorimeter (A).

It is preferable to obtain a color data under the above-mentioned angle condition by measuring a reference color which is a color of the coating film to be matched with the coating color with the multi-angle colorimeter. When forming a repair coating film in repair coating such as automobile repair coating, it is necessary that it is difficult to visually recognize the difference between the color of the coating film in the repair coating part and the color of the coating film near the repair coating part. As the reference color, it is usually suitable to use the color of the coating film near the repair coating part.

Step (2) In the step (2), the color data of the reference color obtained in the step (1) is compared with the color data corresponding to the paint composition registered in the computer in advance, and the reference color is registered. The degree of matching with the color of the paint composition is indexed, the approximate paint composition is selected, and the sample color chart corresponding to the approximate paint composition is obtained. When selecting the approximate paint formulation, usually the one with the smallest color difference from the reference color is often selected, but in addition to the degree of color matching with the reference color, the combination data, glitter data, etc. are taken into consideration. The most reasonable one can be selected as appropriate. This selection method is not particularly limited.

The brilliance data may be described in the sample color chart, or the index showing the brilliance when the degree of color matching with the reference color is indexed and displayed on the screen connected to the computer. Brightness data such as can also be displayed. In addition, the degree of matching of the color with the reference color may be indexed and displayed on the screen, and the color and glitter may be displayed on the screen.

Then, a sample color patch corresponding to the approximate paint composition is obtained from the color patch group.

Step (3) In the step (3), the sensation of brilliance between the sample color chip obtained in the step (2) and the reference color is visually compared. If this visual comparison is performed under high illuminance with a point light source that suppresses scattered light at high illuminance, the difference in color is suppressed and the comparison of brilliance is easy. The conditions are not particularly limited, and may be conditions under which the glitter feeling can be compared under the sunlight or under the electric light.

Step (4) In the step (3), based on the degree of difference between the visual sensations of the sample color patch and the reference color, the luminescent data of the sample color patch, for example, the luminescent sensation. The index is corrected and input to a computer toning device, and the approximate paint composition is converted into a plurality of paint compositions, color data and glitter data corresponding to each paint composition, color characteristic data and glitter characteristics of a plurality of primary color paints. This is a step of obtaining a candidate paint composition that is close to the reference color by making corrections using a color matching calculation logic by a computer toning device in which data is registered.

Step (5) The step (5) is a step of applying a toning-varnished paint prepared on the basis of the candidate coating composition obtained in the step (4) to obtain a toning-finished coated plate, and the toning This is a step of determining whether or not the coating color of the progress coating plate is acceptable with respect to the reference color.

In preparing the toning progress paint, the above-mentioned candidate paint composition or the above-mentioned correction composition may be transmitted to an electronic balance.

The preparation of the toned coating plate is not particularly limited as long as the coating color of the formed coating film can be reproduced under the condition that the coating color of the coating film when actually coated can be reproduced. A known method for producing a toned coating plate can be appropriately used.

A method for determining whether or not the coating color of the toned coating plate is within the acceptance range of the reference color is the difference between the color data of the toned coating plate measured by a colorimeter and the color data of the reference color. For example, it is determined whether ΔE * in the L * a * b * color system is within an allowable range, and whether the glitter feeling is within the allowable range is visually determined. If both the difference in the color data by the colorimeter and the visual judgment of the brilliance are within the permissible range, it is judged as passing. The paint used for the toned coating plate that has passed the test can be used for actual painting.

Step (6) In step (6), when the coating color of the toning-processed coated plate in step (5) is out of the acceptable range of the reference color, a correction composition for further approaching the reference color is obtained. It is a process.

In step (6), the colorimetric data of the paint color of the toned coating plate is input to the computer toning device, and the paint color and the reference color of the toned coating plate are bright. When there is a difference in feeling, the degree of difference in glitter is input to the computer toning device, and the correction combination is obtained using the color matching calculation logic.

Step (7) In the step (7), a toning-processed paint based on the correction composition obtained in the above-mentioned step (6) is applied to obtain a toned-processed coated plate. This is a step of determining whether or not the paint color is within the acceptable range of the reference color.

The method for determining whether or not the coating color of the toned coating plate is within the acceptance range of the reference color is the same as the determination method in the step (5).

The paint used for the toned coating plate that has passed the test can be applied for actual coating. If it fails, the above steps (6) and (7) can be repeated until the judgment is acceptable, and the toning is redone by changing the approximate paint composition selected in step (2). You can also

Next, the second toning method will be described.
In the second toning method, as the data registered in the computer used in the first toning method, each paint composition corresponding to a plurality of color numbers and the painting work number belonging to the color numbers is also registered. The following (8)-
Perform step (10).

Step (8) Step (5) is the same as step (1) in the first toning method.

Step (9) In the step (9), color data of at least one paint mixture having the same color number as the reference color number is selected from the color numbers registered in advance in the computer, and the selected paint is selected. Comparing the color data of the formulation and the color data of the reference color, indexing the degree of color consistency of the paint formulation selected above,
Select an approximate paint formulation and obtain a sample color chart corresponding to the approximate paint formulation. The selection of the approximate paint composition can be performed by the same method as the step (2) in the first color matching method.

Step (10) Step (10) is the same as step (3) in the first toning method.

The second toning method is the above step (8),
Although (9) and (10) are indispensable steps, the following step (11) may be performed after step (10) to bring the color closer to the reference color.

Step (11) Step (11) is the step (4) in the first toning method.
The process is the same as that of step (10), and the brightness data of the sample color patch, for example, the brightness index is corrected based on the degree of difference in the brightness of the sample color patch and the reference color by visual observation in the computer (10). This is a step of inputting to the toning device and operating the color matching calculation logic to correct the approximate paint composition to obtain a candidate paint composition that is close to the reference color.

The second toning method further includes the above step (11).
After that, the following step (12) may be included.

Step (12) Step (12) is the step (5) in the first toning method.
The same process as above, but a toning-processed paint prepared by applying the candidate paint composition obtained in the above step (11) is applied to obtain a toned-processed painted plate, and the toning-processed painted plate is painted. Is a step of determining whether or not the color is acceptable with respect to the reference color. The determination can be performed in the same manner as the step (5) in the first color matching method.

In preparing the color-matching progress paint, the above-mentioned candidate paint composition may be transmitted to an electronic balance. In the first color matching method and the second color matching method, the transmission of the composition to the electronic balance can be performed using a telephone line, an optical cable, or the like. An electronic balance can be used to formulate the toning paint based on this transmitted formulation.

The second toning method may further include the following steps (13) and (14) after the step (12).

Step (13) Step (13) is the step (6) in the first toning method.
This is the same step as in step (12), and is a step of obtaining a correction composition for bringing the color of the toned coating plate out of the acceptable range of the reference color in the above step (12) so as to bring it closer to the reference color.

In the step (13), the colorimetric data of the paint color of the color-matched coating plate is input to the computer color-matching device, and the color of the color-matched painted plate and the reference color are bright. When there is a difference in feeling, the degree of difference in glitter is input to the computer toning device, and the correction combination is obtained using the color matching calculation logic.

Step (14) Step (14) is the step (7) in the first toning method.
The step (14) is the same as that of step (14), and a toning-processed paint based on the correction composition obtained in the above-mentioned step (13) is applied to obtain a toned-processed painted plate. This is a step of determining whether or not the paint color is within the acceptable range of the reference color.

The method of determining whether or not the coating color of the toned coating plate is within the acceptable range of the reference color is the same as the determination method in step (5) in the first toning method.

The paint used for the toned coating plate that has passed the test can be used for actual coating. If it fails, the above steps (13) and (14) can be repeated until the judgment is acceptable, and the toning is changed by changing the approximate paint composition selected in the step (9). You can start over.

[0069]

EXAMPLES The present invention will be described in more detail below with reference to examples. The present invention is not limited to the examples.

Regarding the apparatus used and the measuring method In each of the following examples, the reference color to which the coating color of the paint should be matched by the color matching, and the color measurement of the color-matching progress coating plate are multi-angle color measurement manufactured by Kansai Paint Co., Ltd. The measurement was performed using a total "Van-Van FA sensor". "Van-Van FA sensor"
The angle between the specular reflection axis and the light receiving axis is 25 °, 45 °, 75
It is possible to obtain a color measurement value by measuring under three angle conditions of degrees.

Further, the color characteristic data and the glitter characteristic data of a plurality of primary color paints are registered, and as a computer for operating the color matching calculation logic using each paint composition and each data, Kansai Paint Co., Ltd. A computer color matching device "Van-Van FA Station" manufactured by Kuraray Co., Ltd. was used. As a color chart group including sample color charts, "Comprehensive Reprint Edition" manufactured by Kansai Paint Co., Ltd. was used.
This "Comprehensive Reprint" is a booklet that shows sample color charts of the coating colors of automobiles in Japan and overseas by automobile manufacturer. The colorimetric values and the luster sensation measured values of the paint colors of the color charts published in "Comprehensive reproduction" are stored in the database of "Van-Van FA station". In addition, in the above sample color chart,
Glistening values and paint formulations are described.

Example 1 When performing repair coating on the surface of a silver metallic A color coating film of an automobile body, the coating color around the repaired portion was used as a reference color, and this reference color was measured by a multi-angle colorimeter under three angle conditions. Was done. The colorimetric values were as shown below.

[0073]

[Table 1]

The acceptable range for repair coating under the three-angle condition of silver metallic A color was as shown below.

[0075]

[Table 2]

The colorimetric value of the silver metallic A color is sent to the computer color matching toning device, the degree of matching with the registered paint color is checked, and the matching index is 1.72.
The closest paint formulation was obtained. A sample color chart corresponding to this closest paint formulation was selected from the general reprint. The glitter index MGR and MBV of the coating color of the recently-prepared paint formulation are as follows. MGR is an index that expresses "graininess", and MBV
Is an index representing "glitter", and each is 0 to 10
It is represented by a numerical value of about 0. In each case, the larger the value, the stronger the "particle feeling" or the "glittering feeling".

[0077]

[Table 3]

When the glitter feelings of the sample color chart and the reference color were visually compared, the glitter feeling of the reference color was slightly stronger than the glitter feeling of the sample color chart, so that the computer measured the glitter index MGR and As a correction value for MBV, MGR is increased by 1 memory (MGR value is +5), and MBV is also 1
Increase memory (MBV value +5), computer
Calculations were performed using a color matching calculation logic on a color matching device. The weight ratio of each primary color paint (paint mixture) at that time is as shown in Table 4 below.

[0079]

[Table 4]

A toning-processed coated plate was prepared with the above-mentioned coating composition. The difference in the measured color value of the coating film of the above-mentioned toned coating plate with respect to the reference color in the L * a * b * colorimetric system when measuring under three angle conditions with the above multi-angle colorimeter is as follows. It was as it was.

[0081]

[Table 5]

There was a large difference in the color measurement values between these toned coated plates and the reference color, which were not within the acceptable range for repair coating, and there was a difference in the visual judgment. However, there was no difference in luster between the reference plate and the toned coating plate, so the color of the paint to be toned based on the color measurement value at each angle in the toned coating plate without correction of the luster index. Amount of each primary color paint required for correction (additional instruction amount)
Was calculated by a computer color matching device. As a result, the additional instruction amount was as shown in Table 6 below with respect to 100 parts by weight of the above-mentioned toning paint.

[0083]

[Table 6]

ΔL from the reference color when a toning-processed coated plate obtained by using the paint with the correction of the additional instruction amount is measured under each angle condition using a multi-angle colorimeter. *, Δ
The values of a *, Δb * and ΔE * were as shown in Table 7 below.

[0085]

[Table 7]

Since the difference in the color measurement values between the coating color of the above-mentioned toned coating plate and the reference color was small, it was within the acceptable range for repair coating, and the visual brilliance was also the same. A repair painting was performed on the car body using the final toning paint. When the repair coating part of the car body and the coating surface in the vicinity thereof were visually inspected for color matching, good color matching was confirmed.

Example 2 In repairing the blue metallic / pearl B color coating surface of an automobile body, the coating color around the repaired portion was used as a reference color, and this reference color was used as a multi-angle colorimeter under three-angle conditions. The color was measured by. The colorimetric values were as shown in Table 8 below.

[0088]

[Table 8]

Table 9 below shows the acceptable range of repair coating under the three-angle condition of blue metallic pearl B color.

[0090]

[Table 9]

The colorimetric value of the blue metallic pearl B color is sent to the computer color matching toning device, and the degree of matching is checked from the paint colors registered as the color numbers corresponding to the blue metallic pearl B. As a result, the closest approximation paint formulation having a consistency index of 2.99 was obtained. A sample color chart corresponding to this closest paint formulation was selected from the general reprint. Brightness index MGR and MB of the paint color with a similar paint composition
V was as shown in Table 10 below.

[0092]

[Table 10]

When the glitter feelings of the sample color chart and the reference color were visually compared, the glitter feeling of the reference color was slightly weaker than the glitter feeling of the sample color chart. As a correction value for MBV, MGR is lowered by 1 memory (MGR value is -5), and MBV is also 1
Memory down (MBV value -5), computer
Calculations were performed using a color matching calculation logic on a color matching device. The weight ratio (coating composition) of each primary color paint at that time is as shown in Table 11 below.

[0094]

[Table 11]

A toning-processed coated plate was prepared with the above-mentioned coating composition. The difference in the color measurement value of the coating film of the above-mentioned toned coating plate with respect to the reference color in the L * a * b * color system when the measurement is performed under the three-angle condition with the above multi-angle colorimeter It was as twelve.

[0096]

[Table 12]

There was a large difference in the measured color values between these toned coated plates and the reference color, which were not within the acceptable range for repair coating, and there was a difference in the visual judgment. In addition, because there was a difference in brilliance between the reference plate and the toned coating plate,
Each of the primary colors necessary to correct the color of the paint to be toned based on the color measurement value at each angle on the toned coating plate by performing correction by further lowering the memory for MGR and MBV of the glitter index. The amount of paint (additional instruction amount) was calculated by a computer color matching device. As a result, the additional instruction amount is shown in Table 1 below for 100 parts by weight of the above-mentioned toning paint.
It was as 3.

[0098]

[Table 13]

ΔL from the reference color when the toning coated plate obtained by using the paint with the correction of the above-mentioned additional instruction amount was measured under each angle condition using a multi-angle colorimeter. *, Δ
The values of a *, Δb * and ΔE * were as shown in Table 14 below.

[0100]

[Table 14]

The difference in the measured color values between the coating color and the reference color of the above-mentioned toned coating plate was small, and it was within the acceptable range for repair coating, and the visual luster was the same. A repair painting was performed on the car body using the final toning paint. When the repair coating part of the car body and the coating surface in the vicinity thereof were visually inspected for color matching, good color matching was confirmed.

Example 3 In repairing the red metallic / pearl C color coating surface of an automobile body, the coating color around the repaired portion was used as a reference color, and this reference color was measured with a multi-angle colorimeter under three-angle conditions. The color was measured by. The colorimetric values were as shown in Table 15 below.

[0103]

[Table 15]

The acceptable range for repair coating of red metallic / pearl C color under the three-angle condition is shown in Table 16 below.

[0105]

[Table 16]

The colorimetric values of the red metallic pearl C color are sent to the computer color matching toning device, and the degree of matching is checked from the paint colors registered as the color numbers corresponding to the red metallic pearl C. As a result, the closest paint formulation having a consistency index of 3.33 was obtained. A sample color chart corresponding to this closest paint formulation was selected from the general reprint. Brightness index MGR and MB of the paint color with a similar paint composition
V was as shown in Table 17 below.

[0107]

[Table 17]

When the brilliance feelings of the sample color chart and the reference color were visually compared, the brilliance feeling of the reference color was considerably stronger than that of the sample color chart. The paint color that gives the best brilliance was selected from the sample color chart. Brightness index MGR of the paint color of the selected paint formulation
And MBV are shown in Table 18 below.

[0109]

[Table 18]

The color consistency index of this paint color was 7.49, which was considerably larger than the color consistency index of the closest paint formulation, but the brilliance was almost the same, and this paint formulation was selected. Then, the calculation was performed using a color matching calculation logic in a computer color matching device. The weight ratio (coating composition) of each primary color paint at that time is as shown in Table 19 below.

[0111]

[Table 19]

A toning-processed coated plate was prepared with the above-mentioned coating composition. The difference in the color measurement value of the coating film of the above-mentioned toned coating plate with respect to the reference color in the L * a * b * color system when the measurement is performed under the three-angle condition with the above multi-angle colorimeter Twenty.

[0113]

[Table 20]

There was a large difference in the measured color values between these toned coated plates and the reference color, which was outside the acceptable range for repair coating, and there was a difference in the visual judgment. However, since there was no difference in the luster feeling between the reference plate and the toned coating plate, the MGR and MBV of the luster index were not corrected, and the luster was adjusted based on the color measurement value at each angle on the toned coating plate. The amount of each primary color paint (additional instruction amount) required to correct the color of the paint to be colored was calculated by the computer color matching device. As a result, the additional instruction amount was as shown in Table 21 below with respect to 100 parts by weight of the above-mentioned toning paint.

[0115]

[Table 21]

ΔL from the reference color when a toning-processed coated plate obtained by using the paint with the correction of the additional instruction amount is measured under each angle condition using a multi-angle colorimeter. *, Δ
The values of a *, Δb * and ΔE * were as shown in Table 22 below.

[0117]

[Table 22]

Since the difference in the measured color values between the coating color of the above-mentioned toned coating plate and the reference color was small, it was within the acceptable range for repair coating, and the visual brilliance was the same. A repair painting was performed on the car body using the final toning paint. When the repair coating part of the car body and the coating surface in the vicinity thereof were visually inspected for color matching, good color matching was confirmed.

[0119]

By the color-matching method of the paint using the colorimeter, the sample color chart and the computer according to the present invention, the color-matching of the paint having a glittering feeling can be accurately performed even by a color-matching person with little experience in color-matching. it can.

Claims (8)

[Claims] 1. A colorimeter comprising: (A) a colorimeter; (B) a group of color charts, each of which is a collection of sample color charts corresponding to a paint color work number; (C) a plurality of paint formulations; and colors corresponding to each paint formulation. A computer comprising data and luster data, color characteristic data and luster characteristic data of a plurality of primary color paints, and a computer that operates a color matching calculation logic using the paint composition and each data. Using the toning device, the following steps (1) to (3) (1) A step of obtaining a color data of the reference color by measuring the reference color with which the coating color of the paint should be matched by the toning with a colorimeter (2) The color data of the reference color is compared with the color data corresponding to the paint composition registered in the computer in advance, the degree of color matching is indexed, the approximate paint composition is selected, and the selected approximation is selected. Step of obtaining a sample color chart corresponding to the paint formulation, (3) above A method of toning a paint having a brilliance, comprising the step of visually comparing the brilliance of the sample color chart obtained in the step (2) and the reference color. 2. After the step (3), (4) the computer-aided toning data is used to correct the brilliance data based on the degree of difference in brilliance between the sample color chart and the reference color based on the step (3). 2. The color matching method according to claim 1, further comprising the step of inputting to the above, and correcting the approximate paint composition using a color matching calculation logic to obtain a candidate paint composition that is close to the reference color. (5) A toning-processed coating based on the candidate coating composition obtained in the step (4) is applied to obtain a toned-processed coated plate, and the coating color of the toned-processed coated plate is a standard. The color matching method according to claim 2, further comprising a step of determining whether or not the color is within a pass range. 4. In the step (5), when the coating color of the toning coated plate is out of the acceptable range of the reference color, (6) colorimetric data of the coating color of the toned coated plate by a colorimeter. Is input to the computer toning device, and if the coating color of the toning progress coating plate and the reference color have a difference in brilliance, the degree of difference in brilliance is input to the computer toning device to A step of obtaining a correction composition for making the color closer to the reference color by using the matching calculation logic; (7) a toning-processed paint based on the correction composition obtained in the above step (6) is applied to obtain a toned-processed coated plate. A step of determining whether the coating color of the toned coating plate is within the acceptable range of the reference color, and repeating the above steps (6) and (7) until the determination is acceptable. The toning method according to claim 3, wherein 5. (A) a colorimeter, (B) a color patch group in which sample color patches corresponding to painting color numbers are gathered, (C) a plurality of color numbers, and paints corresponding to the color numbers. Mixture, color data and glitter data corresponding to each paint blend, color characteristic data and glitter property data of a plurality of primary color paints are registered, and the color matching calculation logic using the paint blend and each data is registered. Using a computer toning device consisting of an operating computer, measure the reference color to match the paint color of the paint with the colorimeter by the steps (8) toning of the following (8) to (10) To obtain the color data of the reference color, and (9) color data of the paint composition registered in the computer in advance corresponding to at least one paint color work number belonging to the same color number as the color number of the reference color; Compare with the color data of the color,
Select the approximate paint formulation by indexing the degree of color matching,
The steps of obtaining a sample color chart corresponding to the selected approximate paint composition, and (10) visually comparing the glitter feeling of the sample color chart obtained in the above step (9) with the reference color A method of adjusting the color of a paint having a bright feeling. 6. The brightness data corrected based on the difference in brightness between the sample color chart and the reference color based on the step (10) is input to a computer toning device, and the approximate paint composition is added. 6. The toning method according to claim 5, further comprising the step of: modifying the color matching calculation logic using the color matching calculation logic to obtain a candidate paint composition that is close to the reference color. 7. (12) A toning-processed paint is obtained by applying a toning-processed paint based on the candidate paint formulation obtained in the step (11), and the coating color of the toned-processed paint plate is a standard. The toning method according to claim 6, further comprising a step of determining whether or not the color is within a pass range. 8. In the step (12), when the coating color of the toned coating plate is outside the acceptable range of the reference color, (13) color measurement of the coating color of the toned coating plate by a colorimeter. When the data is input to the computer toning device, and the coating color of the toning progress coating plate and the reference color have a difference in brilliance, the degree of difference in brilliance is input to the computer toning device, A step of obtaining a correction mixture for making the color closer to the reference color by using the color matching calculation logic; (14) applying a toning progress paint based on the correction mixture obtained in the above step (13) to obtain a toning progress coating plate. Then, the step of determining whether the coating color of the toned coating plate is within the acceptable range of the reference color is performed, and the above steps (13) and (14) are repeated until the determination is acceptable. The color matching method according to claim 7, wherein