JPH0780343B2 - Variable color printed matter and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a printed material in which a printed design is formed by a striped pattern, and the color of the printed design is changed at different viewing angles.

(Conventional technique) A holographic device is known as a device that exhibits different patterns depending on the viewing angle.

Holography utilizes diffraction to split white light into its spectral components, with a diffraction grating having 20,000 to 50,000 lines per inch reflecting or transmitting different components of the incident light spectrum. This component is seen as a color vision of a pattern that changes according to the angle change of incident light, but the manufacturing process of the diffraction grating requires a high degree of accuracy and is expensive.

In addition, as another printed matter, there is one in which a lens-shaped composition is used in combination with a color pigment. The lenticular film has a large number of small semi-cylindrical lenses (lenticules),
It is typically made as parallel elongated ridges embossed on the bottom of the film. The lenticules extend parallel to the front surface of the film, changing the way the underlying emulsion (coating) is exposed by the subject matter and the intervening color filter. Lenticular film is often used to create a stereoscopic viewing angle effect that represents left and right images according to changes in viewing angle, but this changes the printed pattern using intermittent lens refraction, The pattern becomes discontinuous and distortion occurs.

Further, Japanese Utility Model Publication No. 2-288 discloses a printed matter in which a pattern is divided into a plurality of regions, each divided region is constituted by a plurality of parallel line patterns, and the directions of the line patterns of adjacent regions are different. Has been done. However, this printed pattern is simply a parallel combination of straight lines on a flat surface, and the change in the pattern is also flat and monotonous, and it is not possible to give the printed pattern a color change or an optical change. It cannot be done.

(Problems to be Solved) It is an object of the present invention to provide a multi-color printing, in which a color is easily changed depending on a viewing angle, by a normal printing technique in a printed matter in which a printed pattern is formed by a striped pattern. .

(Technical Means and Its Effect) A first technical means for solving the above-mentioned problems is to express a striped pattern in a light transmitting portion whose light transmittance is repeatedly changed in parallel, and to form a light transmitting portion. Is to give one or more colors by matching the pitch in parallel with the repeating interval so that the color of the design changes with the change of the viewing angle, and the second technical means is the printed design. All or a part of each is divided into a plurality of areas, and the light is reflected by changing the direction of the pattern stripes in each divided area while displaying the stripe pattern with the reflective portion of the concave stripe that repeatedly and repeatedly changes the light in each divided area. One or two or more colors are given to the parts by matching the pitch parallel to the repeating interval, and the color of the pattern is changed in accordance with the change of the viewing angle.

Since the printed pattern is formed of the light transmitting portion or the light reflecting portion which is repeatedly arranged in parallel, and one or more colors are added in parallel to the repeating interval, the repeated color change corresponding to the visual sense. Occurs, and colors are selectively weakened, hidden, or revealed at different viewing angles, causing a color change in the visible pattern. Since the stripe pattern is parallel in each of the many divided areas and the direction of the pattern stripe is different in each divided area, the light reflection state is different in each area and A different color change occurs for each (claims 1 and 2). Therefore, unlike the case where the lenticule is used, it is possible to change only the color while continuing the pattern.

The strip pattern composed of parallel light transmitting portions or reflecting portions may be formed by a straight line or a bent curve having a certain directionality. It is desirable to provide at least 65 or more ridges or recesses having a stripe pattern, preferably 100 to 400 per inch. The number of threads is about 65 per inch
If it is less, individual grooves or color stripes are perceived than the color of the design, and if it exceeds 400, visually pleasing color change does not appear. In this case, different densities can be formed in the striped patterns of the respective segmented regions by changing the number of strips of the striped regions.

The repetitive change of light in the first technical means includes a repetitive change of translucency in which a transparent film is provided with a plurality of opaque lines. Also, by providing opaque lines on the first surface of the transparent film and providing repeated color changes on the semi-transparent or second surface of the transparent film, respectively, perpendicular to the direction in which the light changes repeatedly, that is, It can be expressed in the thickness direction.

In the second technical means, light is reflected on the uneven surface having a striped pattern, but a foil or other reflective material may be arranged on the surface and the light can be repeatedly changed by utilizing the reflection angle. In this case, the reflective material can be arranged as a base layer on the material to be printed. This groove pattern has a sinusoidal waveform and is formed by a large number of grooves. Of course, the stripe pattern may be formed by combining concave stripes in a grid pattern. Further, a layer having a repeated change in color forming a pattern and a layer having a repeated change in reflection angle may be arranged at intervals in the thickness direction of the reflective material.

It should be noted that these prints can be provided with colors so that at least two different colors can be seen at each viewing angle.

One technique for forming a print with varying colors according to the present invention is to first form a basic plate that defines the selected strip morphology, i.e. the repetitive change of light, and apply based on this plate. It is to form a plate for each color.

The present invention further specifies a plurality of divided areas for a print pattern, selects a stripe pattern form for each area, and a pattern mask for printing corresponding to the stripe pattern form in each region. It is characterized by a method of forming a color print of the print pattern, including forming a print pattern.

When the striped pattern is formed in the light transmitting part, a pattern mask that combines the striped patterns is transferred to form a transparent striped pattern on the transparent film surface, corresponding to each color selected for printing. Then, a plurality of color plates are formed from the pattern mask, and the colors are aligned by applying each selected color to the transparent film having the stripe pattern.

When forming a striped pattern with concave strips, form a die for transfer from a pattern mask that synthesizes the striped pattern, and form an uneven striped pattern by printing pressure from the die onto the reflective material by a thermal transfer method or the like. You can Even if unevenness is formed on the reflective material, multiple colors are formed from a pattern mask corresponding to each color selected for printing, and the color is printed on the uneven surface by printing pressure during printing. Since it can be attached, there is no problem in color printing.

Therefore, the printed matter according to the present invention can easily express a pattern by using a known printing technique (including a transfer technique used in printing).

The formation of a pattern using a plurality of colors is performed by producing a printing plate of each color for reproducing each color pattern and selecting different densities in which each color should be printed in different division areas. Then, in different divided areas, it is possible to specify the stripe density of the stripe pattern, select the form of the stripe pattern for each density, and determine the pattern mask with different directionality of the stripe pattern.

(Examples) Next, specific examples of the above technical means will be described with reference to the drawings.

A portion of a print with varying colors according to the present invention is shown in FIG. 1 as (10), which is a segmented area of the pattern (14) (16).
It contains a cloud (12) partially defined by (18) and (20). Each segmented area has lines oriented differently. These lines are defined in this construction by juxtaposed recesses such as grooves (22) (24) (26) shown in the enlarged view.

The grooves (22), (24) and (26) are formed on the base layer (27) which is an object to be printed, by a method such as using a die to emboss the foil (29) by thermal transfer.

Repeating colors (28) are grooved (22) onto Foyle (29)
(24) (26) Printing is performed by using the printing pressure at the time of printing in conformity with the interval. Due to the presence of Foyleu (29), these grooves serve as a repetitive reflexive change that selectively hides or reveals the color (28) in response to changes in viewing angle.

In this configuration, the repeating colors (28) are yellow stripes (3
0), magenta stripes (32) and cyan stripes (34). Other colors, including black and white, can be substituted or added to the above colors.

The effect of changing the viewing angle is shown by the position (40) (42) of the observer in relation to the rays (44) (46) from the light source (48). The groove (24) mainly reflects the magenta light emitted from the stripe (32) illuminated by the light ray (44),
Perceived by the observer (40). The cyan color emanating from the stripes (30) illuminated by the rays (46) is reflected at different angles and is not perceived by the observer (40). However, the viewing angle causes cyan to be perceived instead of magenta due to the transition, as when the observer (40) moves to the position of the observer (42).

Different viewing angles can also be achieved by transitioning the light source to the position of the light source (50). At this viewing angle, the observer (42) perceives yellow the strongest of all the colors (28).

A change in viewing angle, such as a change in angle of illumination or observation, results in a change in color that is perceived as emitted by the grooves (22) (24) (26). At one viewing angle, areas (14) and (20) appear predominantly yellow, areas (16) appear predominantly cyan, and areas (18) appear predominantly magenta (see Figure 1).

As will be described later, the density or width of the printed color stripes can be adjusted to adjust the area where the silver-colored fooil (29) forming the base appears on the surface.

Different segmented areas, such as areas (14) (16) (18) (20) in FIG. 1, can be formed by the hand mass method or the negative-positive photographic mask method.

A pattern mask (84) in which three different stripe patterns are combined is shown in FIG. In this mask (84), the stripe pattern (86) line extends 135 degrees from the bottom of the area, the stripe pattern (88) line extends 90 degrees, and the stripe pattern (90) line extends 45 degrees. is doing.

When forming a die for thermal transfer, a pattern mask (8
4) is placed, and after the exposure, the mask (84) is removed and the die is washed. When the die (92) is etched, the line pattern (86) (8)
8) (90) can be easily formed.

A master die (92) is used to create the reflective composition of printing with variable colors of FIGS. 1 and 2 for transferring foyle onto the substrate while imprinting by thermal transfer. used. This reflective foil is transferred onto the substrate, such as paper, at the same time as the paper is embossed. It should be noted that alternatives to reflective constructions are described below in connection with the description of FIGS.

After the paper is embossed, different colors are printed separately on the paper using a color plate made from a pattern mask (84). For example, a density of 80% lines of stripes (86) (88) (90) to 20% margin can be used to generate for each color a color image as reproduced by a printing plate of this color. Each color plate is printed with the variable colors of Figure 1 (10)
20% color and 80% margin are printed in each divided area. Alternatively, different color biases can be applied to different regions by changing the proportion of black lines in the pattern. It should be noted that even if a slight deviation occurs in each color plate at the time of printing, since the color appears depending on the viewing angle, the influence on the entire pattern is small, and particularly when the segmented region includes many lines extending in different directions. This printing can be performed by using existing offset printing or letterpress.

A more complex pattern mask positive print (98) is shown in FIG. 5, a portion of which is schematically shown in FIG. The printed matter (98) is enlarged to about 4 times the actual size of the pattern mask.

The unicorn (100) shown in FIG. 6 has an area (102).
(104) (106) (108) (110) (112) (114) and (10
It includes a segmented area like 6). The pattern in each divided area has directionality in the direction pointed by each arrow in these areas. In the area (108), a striped pattern is formed by parallel folding curves having a certain directionality (see FIGS. 5 and 6). Each area (10
2) The stripe patterns of (104), (106), (108), (110), (112), (114) and (106) are selected from ready-made striped patterns and lattices to emphasize the details of the pattern and give a favorable impression. Angled to give.

The repetitive variation of light can be configured using a number of different printing configurations, as shown in Figures 7-9. The printed matter (120) is composed of a transparent base layer (122) embossed on one side in the groove (124), and a repeated color change (126) is printed on the surface of the base layer (122).

By changing the translucency of the groove (124), different colors are perceived at different viewing angles. The groove (124) may also include a reflective material (128) shown by a dotted line. This reflector reflects the light transmitted from the upper base layer (122) rather than changing the light transmission from the bottom.

The segmented regions (121a) of the print (120a) of FIG. 8 achieve similar results by repeatedly using opaque lines on the top surface of the transparent substrate (122a). The opaque lines selectively block most of the illumination light, such as rays (132) (134), and allow the remaining rays, such as ray (136), to pass through.

Since the light ray (136) passes through the magenta color stripe (32a), the yellow stripe (30a) and the cyan stripe (34a) become the light ray (132).
(134) is blocked by the line (130) and will not be perceived.

The line (130) occupies about 80% of the upper surface of the transparent base layer (122a) and leaves about 20% as a margin. For example dotted arrow (140)
When the viewing angle changes due to the change in the illumination angle as shown by, the yellow color is mainly perceived instead of magenta or cyan.

The print (120b) of Figure 9 uses the transparent base layers (150) (152) to define the segmented areas. The opaque line (130b) is the base layer (15
0) above the upper surface and the disturbing line (154) is the base layer (150)
And (152) and are aligned at the same spacing as the line with respect to the space between the lines (130b).

Repeated changes in color (30b) (32b) (34b) are
52) is placed on the lower surface. However, in one other arrangement, additional opaque lines are provided in the margins of the color stripes (30b) (32b) (34b) along the lower surface of the base layer (152).

Although individual features of the invention are shown in one diagram and not in the other, this is for convenience only, and each feature is in accordance with the invention all or part of another feature. Can be combined with.

[Brief description of drawings]

The drawings are for explaining specific examples of the above technical means. FIG. 1 is a schematic enlarged partial view of a printed matter cloud, and FIG.
FIG. 3 is a plan view of a pattern mask made of a selected stripe pattern and a transparent film, and FIG. 4 is made of the pattern mask of FIG. FIG. 5 is a perspective view of a die, FIG. 5 is an enlarged view of a more complex pattern mask for printing with variable colors, and FIG.
7 to 9 are contour views of a part of the divided area shown in the figure.
The figure is a schematic view of a printed matter in another embodiment. (10) printed matter, (14) (16) (18) (20) segmented area,
(22) (24) (26) groove, (29) foil, (30) yellow stripe, (32) magenta stripe, (34) cyan stripe, (48) (5
0) light source, (40) (42) observer, (84) pattern mask, (92) die

Claims (7)

[Claims] 1. In a printed matter in which a printed pattern is composed of a striped pattern, all or a part of the printed pattern is divided into a plurality of areas, and a light transmitting portion in which the light transmittance is repeatedly changed in parallel in each divided area is provided. The stripe pattern is displayed and the direction of the pattern stripe in each divided area is made different, and one or more colors are given by matching the pitch in parallel with the repeating interval of the light transmitting part, and the pattern is changed according to the change of the viewing angle. Printed material with colors changing. 2. In a printed matter in which a printed pattern is formed by a striped pattern, all or a part of the printed pattern is divided into a plurality of regions, and in each divided region, a light-reflecting portion of a concave line that repeatedly changes light in parallel. Shows a striped pattern and makes the direction of the striped pattern of each divided area different, and gives one or more colors by matching the pitch in parallel with the repeating interval of the light reflecting part, and with the change of the viewing angle the pattern Printed material with different colors. 3. The printed matter according to claim 2, wherein the surface of the groove is made of a reflective material, and a layer showing a repeated change of color is formed on the surface. 4. The printed matter according to claim 2, wherein the stripe pattern is formed by combining concave stripes in a grid pattern. 5. A color plate formed from a mask showing a stripe pattern for forming the printed matter according to claim 1, 2, 3 or 4, wherein the colors for printing are aligned in parallel with the stripe pattern. The color plate that I decided to do. 6. A step of instructing divided areas in a print pattern, a step of selecting a pattern shape for each area,
A step of forming a pattern mask that combines stripe patterns directed in different directions for each area, a step of transferring this pattern mask to form a stripe pattern on a transparent film, and each color selected for printing The method for producing a printed matter according to claim 1, further comprising the steps of forming a plurality of color plates from a pattern mask corresponding to the above, and a step of applying each selected color to the transparent film and aligning the colors in a stripe pattern. . 7. A step of designating divided areas in a print pattern, a step of selecting a pattern stripe form for each area,
Corresponding to the process of forming a pattern mask that combines stripes oriented in different directions for each area, the process of forming a transfer die using this pattern mask, and each color selected for printing To form a plurality of color plates from the pattern mask, to thermally transfer the reflective material onto the material to be printed using the transfer die, and to apply each selected color to the transferred reflective material onto the pattern The method for manufacturing a printed matter according to claim 2, further comprising the step of aligning the colors.