JPH02194989A - Method for imparting data - Google Patents

Abstract

PURPOSE:To impart excellent discrimination data without being limited by the color or pattern of cloth by imparting data using both of light emitting ink and light emission control ink. CONSTITUTION:Two kinds of light emitting ink A substantially colorless under visible light and light emission control ink B are used and data is imparted by either one of the light emitting ink and the light emission control ink and the other ink is applied to the circumferential part of said data. For example, by imparting the light emission control ink B to the circumferential part 4 of the data figure 5 imparted by the light emitting ink A, the fluorescence from a white part 2 subjected to fluorescent whitening under the irradiation with ultraviolet rays becomes weak and, therefore, noise can be reduced. By this method, the S/N ratio of the fluorescences of the data and cloth can be made sufficiently large and the discrimination of data can be performed even when there are the white part 2 and a black part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for providing information. For more details,
The present invention relates to a method of providing information that cannot be identified under ordinary visual light, but can be identified under ultraviolet irradiation.

[Conventional technology]

Conventionally, chaco has been used to give an identification symbol containing necessary information for sewing. This can be removed with a brush or a brush after sewing, but it is labor-intensive and complicated, and has the disadvantage that it is difficult to remove completely.

On the other hand, in the highly automated sewing process, the information necessary to attach to the fabric is encoded according to data from a computer, attached to the required position on the fabric, and the machine reads this symbol and cuts and sews the fabric. It will be done. In such a case, the preferable conditions for the means for providing information are (1) that data information from a computer can be directly printed or imprinted on the fabric;

(2) Since the fabric is flexible, printing should preferably be possible without contact.

There is an inkjet method and a sheet method as a means to satisfy this.

On the other hand, media for adding information to fabrics are required to be machine-readable when necessary, and when sewn into products, they must be erased or colorless. It is necessary to be present.

Specific methods for this purpose include: (a) Items that cannot be identified under visible light but can be identified under non-visible light such as ultraviolet light.

(b) Items that can be identified under visible light and can be easily erased or made colorless.

can be given.

Fluorescent whitening dyes can be cited as examples of the above (a) that can be identified by ultraviolet light. This is 420-450 under ultraviolet light
It is a dye that develops a blue-violet to blue color of nm. Also, for fluorescent whitened materials, UV absorbers may be mentioned. This absorbs ultraviolet light on the fluorescently brightened material, reducing reflection in that area.

[Problems to be Solved by the Invention] When information is imparted using the fluorescent whitening dye described above, the information can be identified under ultraviolet light if the fabric does not contain the fluorescent whitening dye. However, in the case of fabrics containing fluorescent whitening dyes, there is an inherent problem that both the fabric and the information develop color under ultraviolet light, making them impossible to distinguish.

Fluorescent whitening dyes are commonly used mainly for white colors, and there is a problem in that the use of fluorescent whitening dyes as information imparting inks lacks versatility.

On the other hand, when information is added using an ultraviolet absorber, information can be identified on fabrics that have been uniformly fluorescently whitened, but on fabrics that have not been fluorescently whitened or fabrics that have been partially fluorescently whitened. It is impossible to identify it.

For this reason, both types of ink are used depending on the color and pattern of the fabric, but for fabrics with vivid colors such as yellow-green, yellow, and orange, or patterns with strong contrast between light and shade, it is best to use either ink. Even the information is difficult to identify.

[Means to solve the problem]

As a result of intensive research and consideration on methods to solve the above-mentioned problems, the present inventors have determined that by imparting information using both luminescent ink and luminescence-suppressing ink, it is possible to improve the effectiveness of fluorescent whitening dyes and ultraviolet absorbers. The book shows that it is possible to identify information with high accuracy even on fabrics with vivid colors such as yellow-green, yellow, and orange, which are difficult to identify even with ink, and on patterns with strong contrast between light and shade. This invention has been achieved.

The purpose of the present invention is not limited to the color or pattern of the fabric,
The object of the present invention is to provide a method for providing excellent identification information.

The present invention has the following configuration.

(1) When providing information using two types of ink, a luminescent ink (Δ) that emits light under ultraviolet light and a luminescence-suppressing ink (B) that suppresses the luminescence of a luminescent substance, information can be transmitted using either of the inks. 1. A method for adding information, comprising applying an ink and applying the other ink to a surrounding area of the information.

(2) As the luminescent ink (A), an ink containing a fluorescent dye is used; as the luminescent ink (B), an ink containing an ultraviolet absorber or/and a quencher for the fluorescent dye is used. The method of providing the information described in (1).

The present invention will be explained in more detail below.

The basic requirements of the present invention are the following two points.

1. Luminescent ink (A) that is substantially colorless under visible light
Information is provided using two types of ink: and luminescence suppressing ink (B).

2. Information is given using either the light emitting or light emitting suppressing ink, and the other ink is given to the surrounding area.

The above problem can only be solved if these two points are satisfied.

In the prior art, for example, it was impossible or very difficult to identify the information given to a fabric in which a fluorescently brightened white background was partially present, but the present invention has made it possible to identify the information. Figure 1 shows an example of how this mechanism is used to impart information to a fabric with a striped pattern of black and fluorescently brightened white. Figure 1 shows the method of the present invention. is applied with luminescent ink (A), and luminescence-suppressing ink (B) is applied to the surrounding area. FIG. 2 is a schematic diagram in which the information of the number "5" is added to a fabric using only ink containing a fluorescent whitening agent.

FIG. 3 is a schematic diagram in which the information of the number "5" is added to a fabric using only ink containing an ultraviolet absorber.

In Fig. 2, part 3, which has been given the information number "5" with ink containing a fluorescent whitening agent, can be identified without any problem in black part 1 under ultraviolet irradiation, but in white part 2, it can be identified by fluorescence from the information. Indistinguishable from fluorescence caused by fluorescent whitening. In other words, the fluorescence in the white background portion 2 becomes noise and cannot be identified.

In addition, in FIG. 3, the area 4 marked with the information numeral "5" using ink containing an ultraviolet absorber as a non-luminescent ink can be identified without any problem in the white area 2 under ultraviolet irradiation, but in the black area 1 Information is missing because there is no difference between areas to which absorbent is applied and areas to which absorbent is not applied. Therefore, the information cannot be identified.

On the other hand, in the method of the present invention shown in FIG. 1, the luminescence suppressing ink (B) is applied to the area around the information numeral "5" provided with the luminescent ink (A), so that the fluorescence increases under ultraviolet irradiation. Fluorescence from the white background part 2 becomes weak, so it is possible to reduce noise without reducing noise.This makes it possible to sufficiently increase the signal-to-noise ratio between the information and the fluorescence of the fabric.
Even if there is a black background part 1, the information can be identified.

Further, information can be similarly identified by applying luminescent ink (A) to the surrounding area of the information numeral "5" to which luminescence suppressing ink (B) has been applied.

In addition, with brightly colored fabrics, it is difficult to identify information using conventional inks due to the high brightness and color of the fabrics, but the method using the two types of inks of the present invention Once added, the information appears to be floating above the surroundings under ultraviolet irradiation, allowing for highly accurate identification.

In the present invention, "substantially colorless under visible light" means that the compound applied to the fabric does not affect the color or pattern of the fabric under visible light. Even if the compound is colored, it can be said to be substantially colorless if it does not affect the color or pattern of the fabric by lowering its concentration.

In the present invention, the luminescent ink is substantially colorless under visible light, uses ultraviolet rays as excitation light, and is fluorescent or/and fluorescent in the visible region.
and an ink containing at least one type of fluorescent dye that emits phosphorescence.

Various types of fluorescent dyes have been known so far. In particular, many fluorescent whitening dyes are known which are used to improve the whitening of fabrics. Furthermore, dyes for dye lasers, metal complexes, fluorescent pigments, etc. can be used.

Fluorescent dyes that can be used in the present invention are not limited by structure, but specific examples include the following compounds.

Examples of organic compounds include fused cyclic hydrocarbons such as anthracene, chrysene, pyrene, triphenylene, 1,2-bentsupyrene, and trinaphthylene, and derivatives thereof, thiazole derivatives, oxazole derivatives, pyridine derivatives,
penzoxazole derivatives, penzoxazine derivatives,
Examples include heterocyclic compounds such as flavone derivatives, coumarin derivatives, quinoline derivatives, and acridine derivatives.

More specifically, preferably Color Index Number Fluorescent Brightening Agent (C
81, Fluorescent Brightenin
g Agent C, I below.

(abbreviated as FB) 14, 24. 30. 32. 52°54
, 69. 79. 84. 85°86,
87. 90,104,112゜113.114,
119,121.1! ! 34°135.152,166
．． 167.168゜169.191, 192.201,
204°214.216.217,218,223°2
24.225.226.229, 234°236.23
9.240.242.257゜260.271.290
．． 310,311゜312.313.314,315,
316°317. Carbostyryls such as 7-amino-4-methylcarbostyryl and 7-dimethylamino-4-methylcarbostyryl, 1,4-bis[2-(5-phenyloxazolyl)]
Benzene, oxazoles such as diphenyloxazole, 7-amino-4-methylcoumarin, 4,6-dimethyl-7-ditylaminocoumarin, 4-methylumbelliferone, 7-danitylamino-4-methylcoumarin, 7-amino-4-methylcoumarin, 4-methylumbelliferone, 7-danitylamino-4-methylcoumarin, Dimethylaminocyclopentacoumarin, 7-amino-4-
Trifluoromethylcoumarin, 7-ethylamino-6-
Coumarins such as methyl-4-trifluoromethylcoumarin and 7-dimethylamino-4-trifluoromethylcoumarin, manufactured by Riedel-deHaen
ΔG/Germany) Lumilux series, Lumilux Blue Green CD301 (C18H
2ON2 S) Lumilux Green CD302 (C24H16N204 S) Lumilux White Yellow CD304 (C21H
Examples include penzoxazines such as 16N 2 04 S).

As metal complexes, oxine, 2-methyloxine, 5,
Metal complexes of oxine and oxine derivatives such as 7-dichlorooxine, 5,7-dibromooxine, especially cadmium, magnesium, manganese, zinc, samarium,
Examples include metal complexes of oxine and oxine derivatives of beryllium, aluminum, gallium, indium, and zirconium, metal complexes of salicylic acid and salicylic acid derivatives, thenoyltrifluoroacetone europium complex, penzoyltrifluoroacetone europium complex, and derivatives thereof.

As inorganic fluorescent pigments, ZnS2Cu, ZnS:Ag, Zn
S:Mn.

ZnCd5:Ag, Zn3 (po4):Mn.

Zn25in4: Mn.

Zn2SiO4:Mn@As.

Cd202S: Tb, La2O2S: Tb.

La2O2S: Eu, Y2O3: Eu.

Y2 02 S:Eu, Y2 02 S:Tb
.

Y25i05:Ce5Tb.

BaS i205: Pb.

CaSiO3:Mn/Pb.

Examples include metal salts using trace metals as activators, such as CaWO4:SE (SE: rare earth element).

In the present invention, the luminescence-suppressing ink (B) refers to an ink containing at least one of an ultraviolet absorber and a fluorescence quencher.

An ultraviolet absorber is a compound that is substantially colorless in the visible region and whose excited state that absorbs ultraviolet light is efficiently deactivated by non-radiative transition.

Ultraviolet absorbers that can be used in the present invention are not limited in structure, but specific examples include the following compounds. Substituted or unsubstituted benzoic acid esters, cinnamic acid esters, acetophenones, benzophenones, naphthophenones, α, β-unsaturated ketones, coumarins and carbostyryls, azoles, thiazolidones, pyridine, quinoline, alkali earth Ultraviolet absorbers such as metal chelates.

Preferably, resorcin monobenzoate, methyl salicylate, phenyl salicylate, benzyl salicylate,
cresyl salicylate, homomethyl salicylate, β-
naphthylsalicylate, resorcin monosalicylate,
p~octylphenyl salicylate, 0-phenylphenol salicylate, 4-t-butylphenyl salicylate, hydroquinone disalicylate, p-phenyl p-oxybenzoate, dioxybenzene ester of p-oxybenzoic acid, p - p-methoxyphenyl anisate, resorcin monosalicylate, p-aminobenzoic acid, aliphatic alcohol ester of p-aminobenzoic acid, polyethylene glycol ester of p-aminobenzoic acid, ester of 3,5-dinitrobenzoic acid , 2-human siloxy-3-methoxycinnamic acid ester, 4-methoxycinnamic acid β-ethylaminoethyl ester, 2,4-dihydroxybenzophenone, 2-hydroxy-4-acetoxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2
-Hydroxy-4-allyloxybenzophenone, 2-
Hydroxy-4-benzyloxybenzophenone, 2.
2'-dihydroxy-5,5'-dimethylbenzophenone, 2. 2'dihydroxy-4,4'-dimethoxybenzophenone, 2. 2', 4. 4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2-hydroxy-
Sodium 4-medoxybenzophenone-5-sulfonate, 2,2'-dihydroxy-4,4'-dimethoxy-5,5'-disulfobenzophenone, 2゜2'-dihydroxy-4,4' -dimethoxy-5,5-disulfobenzophenone disodium salt, 2゜4-dihydroxybenzophenone-5-methylketone, 2-hydroxybenzophenone-4-salicylate, 2-hydroxybenzophenone-4-oxyacetic acid, 2-hydroxybenzophenone -5-2'-dicarboxylic acid, 2-hydroxy-
5-methylbenzophenone-2'-carboxylic acid, 2-hydroxy-5-methylbenzophenone-2'4'-dicarboxylic acid, dibenzalacetone, oxalate ester of 2-hydroxybenzalacetone, 6-aminocoumarin,
8-methoxycoumarin, 4-methyl-7-dimethylaminocoumarin, 5.7-cyhydroxycoumarin, 1,4-
Dimethyl-7-oxycarbostyryl, 4-methyl-7
-oxycarbostyryl, 4-methyl-7-aminocarpostyryl, 3-propyl-4-methyl-7-oxycarbostyryl, 2-phenylbenzimidazole, 4.
5-diphenyl-2-mercaptoimidazole, 2-p
-aminophenylbenzimidazole, 2-phenyl-
5-aminobenzoxazole, 2-p-aminophenyl-6-methylbenzothiazole, 5-benzyl-3-
Ethylrhodanine, 5-benzyl-3-methyl-2,4
-thiazolidine, 5-benzyl-3-n-cetyl-2-
Phenylimino-4-thiazolidone, 2-benzylaminopyridine, 2-benzoylaminopyridine, 2-hydroxy-4-methoxyacetophenone, 2-hydroxy-5-methylacetophenone, 2-hydroxynaphthophenone, 2-hydroxynaphthophenone sulfonic acid ,
These include ethyl-2-cyano-3,3'-diphenylacrylate and 2-ethylhexyl-2-cyano-3,3'-diphenylacrylate.

A further preferred property is that the molar extinction coefficient (ε) is as large as possible, that is, l.

gε>4, there is little radical dissociation due to ultraviolet rays, and the upper limit of absorption of the ultraviolet absorber is sharply cut at 400 nm.

A fluorescence quencher is a compound that is virtually colorless in the visible region, and binds, associates, or collides with a fluorescent dye, rendering the fluorescent dye incapable of emitting fluorescence, or depriving the fluorescent dye of its excitation energy. A compound that weakens the fluorescence intensity by The relationship between the chemical structure of a quencher and its quenching ability is complex and cannot be explained univocally, and the quenching ability changes depending on the target fluorescent dye, so we will systematically give specific examples. Although it is difficult to describe, examples include the following compounds.

Metal salts such as iodine ion, bromide ion, chloride ion, thiocyanate ion, thiosulfate ion, sulfite ion, iodate ion, bromate ion, chlorate ion, nitrate ion, phenol, anisole, hydroquinone, hydroquinone methyl ether, hydroquinone Dimethyl ether, hydroquinone diacetate, resorcinol, resorcinol dimethyl ether, pyrocatechol, pyrocatechol dimethyl ether, guaiacol, cresol, orcinol, pyrogallol, gallic acid, thymol, nitrobenzene, aniline, phenylenediamine, toluidine, xylene, alpha-naphthol, stilbene, cyclopenta Jen, thiophene, furan, pyrrole, dimethylbutadiene, diphenylbutadiene, diphenylbutadiene
These include α-carboxylic acid, sodium stearate, sodium laurate, sodium palmitate, alkylammonium chloride, polymethacrylate ethyltrimethylammonium chloride, pyridinium ion, quinolinium ion, acridinium ion.

In the present invention, the inkjet ink is prepared by dissolving a fluorescent dye in a luminescent ink, and an ultraviolet absorber or/and a quencher in a luminescence-suppressing ink in an appropriate solvent or using an appropriate dispersant. Pulverize and disperse to make ink.

Additionally, an anti-drying agent is added to the ink. Preferred anti-drying agents include glycols such as ethylene glycol, diethylene glycol, polyethylene glycol,
At least one member selected from propylene glycol, glycerin, 1,3 propanediol, 1,4 butanediol, 1.5bentanediol, glycol ethers, such as diethylene glycol 7-methyl ether and diethylene glycol monobutyl ether.

Polymers are further added to the ink as a binder component. The polymer is preferably a water-soluble or water-dispersible polymer from the viewpoint of workability, and a polymer that becomes substantially colorless under visible light after drying is preferred.

Specifically preferred binder components include polyvinylpyrrolidone (hereinafter referred to as PVP), polyvinyl alcohol (hereinafter referred to as PVA), modified nylon, water-soluble or water-dispersible polyester, polyacrylic acid, polyacrylate, polymethyl methacrylate. , polyacrylamide, styrene-maleic acid copolymer and derivatives thereof, methylcellulose, carboxymethylcellulose,
At least one selected from sodium alginate and starch.

Furthermore, other known additives can be added to the ink as long as they do not impede the effects of the invention.

For example, surfactants, pH adjusters, ion sequestrants, preservatives, oxygen absorbers, etc.

The pattern of applying ink around the information varies depending on the color and pattern of the fabric to which the information is applied. A specific example thereof is shown in FIGS. 4 to 7, but the invention is not limited thereto.

FIG. 4 is a schematic diagram in which a pattern is provided along the outline of information.

FIG. 5 is a schematic diagram in which a rectangular pattern surrounding information is provided.

FIG. 6 is a schematic diagram in which an unapplied area is provided between the information and the attached area around it to which neither luminescent nor non-luminescent ink is applied, thereby imparting a pattern along the outline of the information.

FIG. 7 is a schematic diagram in which a non-applied area to which neither luminescent nor non-luminescent ink is applied is provided between the information and the applied area around it, and a rectangular pattern surrounding the information is provided.

In these Figures 4 to 7, 5 is an information part given with luminescent ink (or an information part given with non-luminescent ink), and 6 is a surrounding part of the information given with non-luminescent ink. (or the surrounding area of information applied with luminescent ink), 7 indicates the area where ink is not applied between the information and the surrounding area.

The areas 7 to which no ink has been applied in FIGS. 6 and 7 are particularly effective when information is applied to fabrics that tend to bleed ink.

In other words, when a luminescent ink (A) and a luminescent ink (B) are applied next to each other on a fabric that easily bleeds (for example, as shown in Figures 4 and 5), the ink bleeds and the two inks mix together, resulting in a clear image. Although information cannot be obtained, by providing the uninked portion 7, the two inks do not mix together, and clear information can be obtained.

When applying information using inkjet, the width of this uninked area 7 is determined by the degree of ink bleeding on the fabric, the size of the information, the weaving and knitting structure of the fabric, the color pattern of the fabric, the resolution of the inkjet, and the ink droplet. Although the size of the ink jet and the resolution of information identification are determined in relation to each other, it is preferable that the width is in the range of 1 dot to 10 dots in terms of inkjet resolution.

The present invention will be illustrated in the following examples.

(Example) Example 1 1. Luminescent ink (A) Whitex BF liquid 10% (C,
1, FB90 Sumitomo Chemical Co., Ltd. Ethylene Glycol 20% Gohsenol GL-052
% (PVA Nippon Gosei Kagaku Co., Ltd.) Ion exchange water 68% After mixing and stirring each component, filter using a 1 micron filter,
The mixture was degassed under reduced pressure to prepare an inkjet ink.

2. Luminescence suppression ink (B) 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid 5% ethylene glycol 20% Gohsenol GL-
052% (PVA Nippon Gosei Kagaku Co., Ltd.) Ion exchange water 73% After mixing and stirring each component, filter using a 1 micron filter,
The mixture was degassed under reduced pressure to prepare an inkjet ink.

For inkjet, an on-demand type device with a nozzle diameter of 60 microns and a resolution of 8 dots/mm was used. For the information, a 5-digit number string with a number size of 8 mm was provided using luminescent ink A, and the surrounding area was provided with luminescent ink B in the pattern shown in FIG. 7.

The following fabric was used.

Fabric A, nylon knit (bright yellow-green) Fabric B, Tetron processed yarn fabric (black and white fluorescent white stripe print) The ejection characteristics of both inks were good.

In addition, the attached information is not detected under visible light, but
Under ultraviolet light from a black light, the information given to both fabrics A and B could be correctly identified.

Comparative Example 1 Information was provided using only the luminescent ink A of Example 1 under the same conditions as Example 1 except for the luminescent ink A.

However, the attached information is of the following two types.

1. A 5-digit number string with a number size of 8 mm is provided. 2. Only the surrounding area of the 5-digit number string with a number size of 3 mm is provided in the pattern shown in Figure 5.

Fabric A under ultraviolet light from a black light.

The two types of information given to each B could not be recognized correctly.

Comparative Example 2 Information was provided using only the luminescence-suppressing ink B of Example 1 under the same conditions as Example 1, except for the use of the luminescence-suppressing ink B of Example 1.

However, the provided information is the same as in Comparative Example 1: two types.

Under ultraviolet light from a black light, the two types of information given to each AlB fabric on the fabric could not be correctly identified.

Example 2 1. Luminescent ink A Fluorescent dye: LUMILUX Green CD301 (manufactured by Riedeldehaen, Germany) 1% Dispersant and binder: 5MA1440H (ammonia neutralized styrene-maleic acid copolymer) , ARCOC
Hemi Cal Company)
2% propylene glycol as an anti-drying agent, 30% ion-exchanged water, 67% the above compounds were mixed, and the mixture was ground and dispersed using a sand grinder for 40 hours. This dispersion was filtered using a 10 micron filter and degassed under reduced pressure to prepare an inkjet ink.

2. Ethyl-2-cyano-3,3' as ultraviolet absorber for luminescence suppression ink B
- Diphenylacrylate 5% As a dispersant and binder, 5MA1440H (ammonia neutralized product of styrene-maleic acid copolymer, Arco Chemical Co., Ltd. (ARC
O Chemical Company)
1% PVP K2O as binder 2% Propylene glycol as anti-drying agent 30% ion exchange water
60% of the above compounds were mixed and pulverized and dispersed using a sand grinder for 40 hours. This dispersion was filtered using a 10 micron filter and degassed under reduced pressure to prepare an inkjet ink.

For the inkjet, an on-demand type device with a nozzle diameter of 60 microns and a resolution of 8 dots/mm was used.

For the information, a 5-digit number string with a number size of 3 mm was provided using luminescent ink A, and the surrounding area was provided with luminescent ink B in the pattern shown in FIG. 6.

The following fabric was used.

Fabric C, 70% wool/30% polyester mixed yarn-dyed fabric black and white (fluorescent whitening) houndstooth pattern) The ejection characteristics of both inks were good. The attached information could not be detected under visible light, but the information attached to the fabric could be correctly identified under ultraviolet light from a black light.

Example 3 1. Luminous ink A Whitex WS liquid 25% (C, I
, FB52 Juju Chemical Co., Ltd. Ethylene glycol
20%AQ-Nylon T-, 704
% (Amino-modified nylon manufactured by Toshiku Co., Ltd.)) Ion exchange water 51% After mixing and stirring each component, the mixture was filtered using a 1 micron filter and degassed under reduced pressure to prepare an inkjet ink.

2. Luminescence suppression ink B Hydroquinone 5% 1.4
-Butanediol 20% polyacrylamide 2% ion exchange water
After mixing and stirring the 73% components, the mixture was filtered using a 1 micron filter and degassed under reduced pressure to prepare an inkjet ink.

An on-demand inkjet device with a nozzle diameter of 60 microns and a resolution of 8 dots/mm was used. For the information, a 5-digit number string with a number size of 8 mm was provided using luminescent ink A, and the surrounding area was provided with luminescent ink B in the pattern shown in FIG. 4.

The fabrics are fabric AXB of Example 1 and fabric C of Example 2.
Seeds were used.

The ejection characteristics of both inks were good.

The attached information could not be detected under visible light, but the information attached to the fabric could be correctly identified under ultraviolet light from a black light.

Example 4 In Example 3, information was provided using luminescence-suppressing ink B as a 5-digit number string with a number size of 8 mm, and using luminescent ink A around the 5-digit number string in the pattern shown in FIG. 5.

Although the attached information was not detected under visible light, it was possible to correctly identify the information attached to the fabric under ultraviolet light from a black light.

From the above Examples and Comparative Examples, it can be seen that the information provision method of the present invention is a particularly excellent method.

That is, as shown in Comparative Example 1.2, information cannot be identified using ink containing a fluorescent brightener or ink containing an ultraviolet absorber, but information cannot be identified using the method of the present invention (Example 1). I know it's possible.

(Effects of the Invention) The present invention uses two types of ink, a luminescent ink and a non-luminescent ink, when imparting information by an inkjet method, thereby providing information without being limited to the color or pattern of the fabric. Excellent identification information can be given.

[Brief explanation of the drawing]

FIG. 1 shows a method according to the present invention, and is a schematic diagram in which information of the number "5" is applied to a fabric using luminescent ink (A), and luminescence-suppressing ink (B) is applied around it. FIG. 2 is a schematic diagram in which the information of the number "5" is added to a fabric using only ink containing a fluorescent whitening agent. FIG. 3 is a schematic diagram in which the information of the number "5" is added to a fabric using only ink containing an ultraviolet absorber. FIG. 4 is a schematic diagram showing numerical information and a pattern along the outline of the information. FIG. 5 is a schematic diagram showing numerical information and a rectangular pattern surrounding the information. Figure 6 is a schematic diagram in which numerical information and a pattern along the outline of the information are added by providing an unapplied area with neither luminescent nor non-luminescent ink between the information and the attached area around it. It is a diagram. Figure 7 is a schematic diagram in which numerical information and a rectangular pattern surrounding the information are added by providing an unapplied area where neither luminescent nor non-luminescent ink is applied between the information and the attached area around it. It is. 1: Black area 2: Fluorescently brightened white area 3: Area to which information was added with ink containing a fluorescent whitening agent 4: Area to which information was added with ink containing an ultraviolet absorber 5: Area to which information was added with ink containing a luminescent ink Information part (or information part given with non-luminescent ink) 6: Surrounding part of information given with non-luminescent ink (or surrounding part of information given with luminescent ink) 7: Information and The area where ink is not applied between the surrounding area and the area where ink is not applied.

Claims (2)

[Claims] (1) When providing information using two types of ink: a luminescent ink (A) that emits light under ultraviolet light and a luminescence-suppressing ink (B) that suppresses the luminescence of a luminescent substance, information can be transmitted using either of the inks. 1. A method for adding information, comprising applying an ink and applying the other ink to a surrounding area of the information. (2) As the luminescent ink (A), an ink containing a fluorescent dye is used; as the luminescent ink (B), an ink containing an ultraviolet absorber or/and a quencher for the fluorescent dye is used. A method for providing information according to claim (1).