KR100506130B1 - Penetrating ink composition - Google Patents

Abstract

The present invention relates to a penetrating ink composition, and more particularly, to printing a penetrating ink on a printed object such as paper or textiles, the ink composition which causes a printing pattern such as numbers and letters printed on the front side to appear on the back side. It is about. The penetrating ink according to the present invention can prevent the tampering caused by erasing and modifying the printing pattern on the front surface by printing patterns such as numbers and letters printed on the front surface of the front surface. The printing pattern can be checked, thereby preventing counterfeiting and tampering with securities, security documents, and important documents.

Description

Penetrating ink composition

The present invention relates to a penetrating ink composition, and more particularly, to printing a penetrating ink on a printed object such as paper or textiles, the ink composition which causes a printing pattern such as numbers and letters printed on the front side to appear on the back side. It is about.

In the penetrating ink according to the present invention, a part of the resin, solvent, pigment or dye constituting the ink is dispersed, penetrated, splattered or diffused after the printing ink is printed on a printed object having fine pores between fibers such as paper or fiber. It is considered to be a bad phenomenon in the past by using a phenomenon in which a printing pattern appears up to the back side of a printed object due to various phenomena such as the above.

Generally used inks are intended to penetrate to the surface or proper interior of the printed matter and to be dried or polymerized so that the back surface is clean or vividly printed. The situation is developing the ink to prevent.

However, the proper use of such penetrating phenomena makes it possible to use special inks that can prevent the forgery and tampering of securities, security documents, and important documents. Even if you don't have a special tool, comparing the front and back of the print will give you a noticeable effect.

Conventional penetrating ink is a technology that is registered as a patent because it is a part that faces the basic required characteristics of the printing ink, but not many.

As a technique similar to the present invention, Korean Patent Publication No. 1987-38 discloses a dual-color ink composition, wherein a first colorant having particles of 0.5 microns or more and a second colorant having particles of 1 micron or less ( A method of using a phenomenon in which a second colorant is smeared on an outline of a printed pattern when ink is mixed and inkled and written with a writing instrument is disclosed. There is a monotonous aspect that shows only eggplant color.

In addition, Japanese Patent Application Laid-open No. Hei 10-7956 discloses a penetrating fluorescent ink composition which utilizes a phenomenon in which a coloring fluorescent dye spreads on a printed pattern portion when ink is printed by printing a coloring agent and a colored fluorescent dye in a resin which is cured by ultraviolet rays. There is a monotonous aspect that shows only two colors by colorants and colored fluorescent dyes. In addition, Japanese Patent Application Laid-open No. Hei 10-298464 discloses a dye-type colorant as a fine bubble of a printed object when ink is mixed with a vehicle-type pigment and a dye-type colorant and printed on rubber, metal, glass, ceramic, etc., which have fine bubbles. An ink composition for penetration printing using a phenomenon that penetrates until has been disclosed, but colorants of pigments and dyes have the same characteristics.

U. S. Patent No. 6,306, 929 has a bleeding ink for an important document that utilizes a phenomenon in which oil soluble dyes bleed when a solvent, such as acetone or alcohol, is used to erase a specific print pattern after inking and printing a mixture of common pigments and oil soluble dyes. It is described.

Therefore, the present inventors have a counterfeit and tamper proof effect in view of the fact that the conventional penetrating ink or smearable ink is insufficient to prevent forgery and tampering of securities, important documents, security documents, etc. It was intended to prepare a penetrating ink.

Therefore, an object of the present invention is to prevent the tampering caused by erasing and modifying the print pattern on the front surface by printing patterns such as numbers, letters, etc. printed on the front surface, and the original printing pattern by simple equipment such as ultraviolet lamps The present invention provides a penetrating ink composition having an effect of preventing forgery and tampering with securities, security documents, and important documents.

The penetrating ink composition according to the present invention for achieving the above object, 1 to 60% by weight of the primary color material selected from the group consisting of pigments of black color, color system and colorless system having an average particle diameter of 0.1 micron or more; It is selected from the group consisting of direct dyes, indirect dyes, disperse dyes, basic dyes, acid dyes, reactive dyes, oxidized dyes, fluorescent dyes, water soluble dyes, oil soluble dyes, solvent soluble dyes, alcohol soluble dyes and colored fluorescent dyes. 0.001 to 30% by weight of a secondary color material having an average particle diameter of less than micron; 0.001 to 30% by weight of a tertiary color material selected from the group consisting of an invisible fluorescent dye and an invisible fluorescent pigment which are excited in ultraviolet light and exhibit an fluorescence in an invisible color, and have an average particle diameter of 0.1 micron or less; And 30 to 90% by weight of a vehicle consisting of a resin for resin, a solvent, and an additive.

Hereinafter, the present invention will be described in more detail.

In the present invention, the term “penetrating ink” refers to a part of resin, solvent, pigment and dye constituting the ink dispersed, penetrating, spreading and diffusing after the printing ink is printed on a printed object having fine pores such as paper or fiber. The phenomenon in which a printing pattern appears to the back side of a printed object due to a cause such as such is generically referred to.

The penetrating ink composition according to the present invention is composed of a vehicle serving as a colorant and a binder. The color material is three types, the primary color material represents the color of the printing pattern on the front surface of the printed material, the secondary and tertiary color material represents the color penetrating to the back of the printed material, the vehicle can be divided into resin, solvent and additives.

The primary colorant which can be used in the present invention is a colorant that is printed on a printed object having fine pores between fibers such as paper or fiber and remains on the surface to form a print pattern, and has a property of not being dissolved in the vehicle constituting the ink. In pigment form. Therefore, it has an average particle diameter which cannot pass through fine pores of paper or fibers, and has an average particle diameter of 0.1 micron or more, preferably 0.1 to 3 microns. If the average particle diameter of the pigment is less than 0.1 micron, a phenomenon that penetrates to the back side after printing occurs, which is not appropriate.

In addition, effective primary colorants include black iron oxide pigments, magnetic pigments, carbon black pigments, etc., used to print numbers and numbers, and colored azo pigments and naphthol pigments, which are used to print letters or symbols of important documents. Phthalocyanine pigments, lake pigments, and the like are suitable. Colorless pigments, such as calcium carbonate, barium sulfate, silicon dioxide, titanium dioxide, aluminum oxide, pearl, aluminum powder, copper powder, etc., which are used as fillers in preparing ink, are preferable. . The primary color material is not very limited due to the characteristics of the penetrating ink according to the present invention, and in view of functionality, various materials such as fluorescent pigments, phosphorescent pigments, magnetic pigments, processed pigments, and the like may be used.

In addition, even if the pigment of the primary color material has a particle size of 0.1 micron or more, if it has a property of dissolving in the varnish, solvent, and auxiliary agent in the vehicle constituting the ink, it is not preferable because it penetrates to the back side of the printed material, and thus is restricted. Receives.

In addition, the content of the primary color material in the present invention is 1 to 60% by weight, preferably 5 to 50% by weight.

The effect of the primary color material plays a role of causing the print pattern to appear on the front surface of the printed object after printing with the penetrating ink, and the color of the print pattern may be configured identically to the secondary and tertiary color materials, or configured differently. You may.

Secondary colorants that can be used in the present invention are used as the primary and tertiary colorants, printed on the printed material and then penetrated to the back side to show the printing pattern, and have a characteristic of finely dispersing or dissolving in the vehicle constituting the ink. In the form of colored dyes or pigments. These colorants include direct dyes, vat dyes, disperse dyes, basic dyes, acid dyes, reactive dyes, oxidized dyes, fluorescent dyes, and the like. Especially useful oil dyes are effective dyes, solvent soluble dyes, alcohol soluble dyes, etc. Selected from the group consisting of:

The secondary colorant is a pigment having an average particle diameter that passes through fine pores of paper or fibers, and has an average particle diameter of 0.1 micron or less. If the average particle diameter of the secondary colorant exceeds 0.1 micron, it may not be appropriate to penetrate to the back side after printing, and such an effective secondary colorant may be different from the same color as the primary and tertiary colorants or with a dye of a different color. Pigments etc. can be selected and used.

When the penetration ink in the present invention is a water-soluble ink, the secondary colorant uses a water-soluble dye or pigment, and in the case of an oil-soluble ink, a water-soluble dye or pigment may be used.

In the present invention, the content of the secondary colorant is 0.001 to 30% by weight, preferably 0.01 to 10% by weight, and if it is less than this range, the penetrating colored color becomes pale and has no effect and does not show fluorescence when it is fluorescent color. If it exceeds the above range, the concentration of the colored or fluorescent color does not increase due to the characteristics of the dye or pigment.

In the present invention, the effect of the secondary color material plays a role in which the print pattern appears on the back of the printed object after printing with the penetrating ink, and the color of the print pattern may be configured identically to the primary and tertiary color materials. Each can be configured differently.

On the other hand, the tertiary colorant available in the present invention is used as the primary and secondary colorant, printed on the printed material, penetrates to the back side, and exhibits the characteristics of finely dispersing or dissolving in the vehicle constituting the ink as the colorant representing the printing pattern. In the form of dyes or pigments. In addition, the apparent color (material color, appearance color) of the tertiary color material is colorless (hereinafter referred to as "invisible") and has the biggest characteristic of appearing white or pale off white and fluorescing when excited by an ultraviolet lamp.

The invisible color material exhibiting such an effect is an organic system that is finely dispersed or dissolved in the vehicle constituting the permeable ink, and is very expensive and has invisible properties, so it is not widely distributed in the market and is used in a specific field.

In addition, these pigments are soluble in organic solvents and have a pale off-white color, but since they enter a small amount in the ink composition, the color is hardly produced when printed with ink.

An effective tertiary colorant used in the present invention has the same average particle size and colorant content as the secondary colorant, and is invisible fluorescent dye or invisible that is excited by ultraviolet light while being invisible such as white or off-white. Fluorescent pigments, commercially produced are trade names of the German company Riedeldihein, LUMILUX CD 316 (rare earth metal-acetylacetonate complex), LUMILUX CD 331 (Europium-acetonate complex), LUMILUX CD 332 (rare earth) Metal-biketonate), LUMILUX CD 335 (Europium Complex), LUMILUX CD 339, LUMILUX CD 702 (Europium-Benzogazine), etc., and ER-120, ER-122 as trade names of Japan's "Samjeong Chemical" company. And PKS 225 of Uksung Chemical Co., Ltd. in Korea.

The invisible fluorescent pigments are naphthoyl trifluoroacetone, benzoyl trifluoro acetone, methylbenzoyl trifluoro acetone, fluoro trifluoro acetone, fluorosatriacetyl acetone, triple lor using rare earth elements such as europium and samarium as their luminescence centers. It is a metal complex formed with acetylacetone or the like.

In addition, the pigments are soluble in organic solvents and have a pale off-white color. However, since the pigments enter a small amount in the ink composition, the pigments are hardly produced when printed with ink.

In the present invention, the effect of the tertiary color material is printed on the back of the printed material after printing with the penetrating ink, but the print pattern appears the same as the front side, but it is not visible to the naked eye, and plays a role of showing a specific fluorescent color when reflected by an ultraviolet lamp. In addition, the color of the printing pattern may be configured in the same manner as the primary and secondary color materials, or may be configured differently.

The vehicle constituting the penetrating ink of the present invention may be divided into a resin, a solvent, an additive, and the like, and the resin and the solvent serve to penetrate the secondary and tertiary color materials.

The resin constituting the penetrating ink of the present invention is classified according to a drying mechanism and a curing mechanism, but generally UV-curable resins include epoxy, urethane-modified acrylic, etc., and evaporative drying or oxidation polymerization, and thermosetting resins include alkyd and rosin. Modified phenolic, phenol-modified rosin, styrene alkyd, urethane, epoxy, etc. are variously selected according to the printing method and can be used in combination.

The solvent constituting the penetrating ink of the present invention serves to disperse and penetrate secondary and tertiary colorants to the back side of the printed matter, and to adjust the viscosity, drying characteristics, etc. of the ink auxiliary, and as an alcohol, aliphatic Types, aromatics, esters, ketones, water, and the like are variously used, and various resins and colorants can be selected and used in combination.

The components and compositions of the penetrating ink composition of the present invention vary according to the characteristics of the colorant and the vehicle, and the additives in the ink may include a desiccant for drying the ink, waxes for printing, viscosity, and gloss of the ink, and the like. Dispersants, surfactants, and the like may be used to improve manufacturing properties, dispersion properties, shelf life, and the like.

Therefore, the penetrating ink composition according to the present invention is achieved by properly combining the above-described components, and when the ink is printed on the printed object, the printed pattern is colored by the primary color material on the front surface of the printed object. On the back side, there is a multi-color appearance effect of the secondary and tertiary color materials penetrating the printed material, the fluorescent color by the tertiary color material when fluoresced with an ultraviolet lamp together with the color by the secondary color material. It is effective to prevent forgery and forgery of important numbers and characters printed by.

In the present invention, the content of the vehicle is 30 to 90% by weight, preferably 30 to 70% by weight. In general, resins and solvents are used to select materials with low curing, drying, and low volatility in order to strengthen the penetration effect.

In addition, it is effective that the resin and the solvent have affinity and dissolution characteristics with the secondary and tertiary color materials, otherwise the third solvent which dissolves the resin and the solvent and the secondary color material and the tertiary color material is used. It can also be used.

The ink composition according to the present invention prepared as described above may be applied as an ink for letterpress, flat plate, intaglio, screen, gravure, or may be applied as a writing instrument ink.

The present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited thereto.

Example 1

To the components and contents according to the following Table 1 was prepared a UV curable type penetration ink of the type according to the present invention.

ingredient weight% Epoxyacrylate Resin * 70.0% by weight Igacure 907 (photoinitiator) 4.0 wt% Butyl Carbitol (Solvent) 14.0 wt% Princetax 60 (primary colorant, carbon black pigment) 6.0 wt% Solvent Yellow 19 (Secondary Colorant, Yellow Dye) 1.0 wt% CD 702 (Third Color Material, Invisible Green Fluorescent Pigment) 5.0 wt%

* Epoxyacrylate resin (Acrylic acid: 73.2%, Epoxy resin: 24.4%, Hydroquinone: 0.02%, Diethanolamine hydrochloric acid: 0.378%, 1,6-nuxaanidiol dimethacrylate: 14.5%)

After printing, the penetrating ink was cured with ultraviolet rays and left for 2 to 3 days. As a result, a black printing pattern appeared on the front side, a yellow printing pattern appeared on the back side, and a yellowish yellow fluorescence when illuminated with an ultraviolet lamp. The printing pattern of appeared.

Example 2

Except for replacing the secondary colorant with solvent black 35, a black dye, it was carried out in the same manner as in Example 1.

After printing the penetrating inks, they were cured with ultraviolet rays and left for 2-3 days. As a result, black printing patterns appeared on the front and back sides, and when the back side was illuminated with an ultraviolet lamp, the green fluorescence was affected by the black dye. Received a black green fluorescence printing pattern.

Example 3

To the components and contents according to the following Table 2 was prepared an oxidative polymerization dry type letterpress ink according to the present invention.

ingredient weight% Alkyd Varnish 50.0% by weight Flax Seed Varnish 10.0 wt% Montan Wax 3.0 wt% Cobalt Octoate (Drying Agent) 3.0 wt% Petroleum solvents (boiling point 270-280 degrees) 5.0 wt% Glycerin (Solvent) 7.0% by weight Princetax 60 (primary colorant, carbon pigment) 15.0 wt% Solvent Red 52 (Secondary Colorant, Red Dye) 2.0 wt% CD 702 (Third Color Material, Invisible Green Fluorescent Pigment) 5.0 wt%

After dry printing, the penetrating ink is printed and then dried naturally. A black printing pattern appears on the front side, a red printing pattern appears on the back side, and green fluorescence is affected by red dye when exposed to ultraviolet rays by UV lamp. A print pattern appeared.

Example 4

A thermosetting offset ink according to the present invention was prepared with the ingredients and contents according to Table 3 below.

ingredient weight% Rosin Modified Phenolic Resin 27.0% by weight Flax Seed Varnish 6.0 wt% Petroleum solvents (boiling point 270-280 degrees) 37.0 wt% Ethylene glycol 7.0% by weight Cobalt Octoate (Drying Agent) 2.0 wt% Aluminum Chelate (Gelating Agent) 0.5 wt% Phthalocyanine blue (primary colorant, blue pigment) 14.0 wt% Solvent Orange 5 (Secondary Color, Yellow Dye) 2.5% by weight PKS 225 (tertiary colorant, invisible red fluorescent pigment) 4.0 wt%

Offset printing of the penetrating ink and hot air drying result in a blue printing pattern on the front surface, a yellow printing pattern on the back surface, and a red fluorescence printing pattern on the back surface of the red fluorescence under the influence of a yellow dye. Appears.

Example 5

The evaporated dry screen ink according to the present invention was prepared with the ingredients and contents according to Table 4 below.

ingredient weight% Pentaerythritol modified rosin resin 27.0% by weight Ethyl hydroxyethyl cellulose 6.0 wt% toluene 23.0 wt% glycerin 3.0 wt% Cellosolve 5.0 wt% Calcium carbonate 15.0 wt% Disazo Yellow HR (primary colorant, yellow pigment) 15.0 wt% Solvent Blue 36 (Secondary Colorant, Blue Dye) 2.0 wt% PK225 (tertiary colorant, invisible red fluorescent pigment) 4.0 wt%

When screen printing and drying of the penetrating ink, the print pattern of yellow color appears on the front surface, the blue print pattern appears on the back surface, and when the ultraviolet light is reflected by the UV lamp, the red fluorescence is affected by the blue dye. appear.

As described above, when the penetrating ink according to the present invention is printed on the printed object, the printing pattern printed with the penetrating ink is represented by the color of the primary colorant on the front surface, and the penetrated ink is penetrated on the back surface. In addition to the color of the secondary color material, the appearance of the multi-color of the fluorescent color by the tertiary color material when reflected by an ultraviolet lamp, and has the effect of preventing forgery and tampering of important numbers and letters printed with this penetrating ink. In addition, if the printing information on the front side is erased with a solvent for forgery or modulation, the printing pattern is spread by colored dyes or invisible fluorescence on the back side. It is giving difficulties.

Claims (3)

1 to 60% by weight of a primary color material selected from the group consisting of black, colored and colorless pigments and having an average particle diameter of 0.1 micron or more; It is selected from the group consisting of direct dyes, indirect dyes, disperse dyes, basic dyes, acid dyes, reactive dyes, oxidized dyes, fluorescent dyes, water soluble dyes, oil soluble dyes, solvent soluble dyes, alcohol soluble dyes and colored fluorescent dyes. 0.001 to 30% by weight of a secondary color material having an average particle diameter of less than micron; 0.001 to 30% by weight of a tertiary color material selected from the group consisting of an invisible fluorescent dye and an invisible fluorescent pigment which are excited in ultraviolet light and exhibit an fluorescence in an invisible color, and have an average particle diameter of 0.1 micron or less; And 30 to 90% by weight of a vehicle consisting of an additive selected from the group consisting of a resin for ink, a solvent and a drying agent, a wax, a dispersant, and a surfactant; A penetration type ink composition comprising a multi-color on the printed material, characterized in that it comprises a. The penetration ink composition of claim 1, wherein the ink composition is expressed in at least one color. The penetrating ink composition of claim 1, wherein the ink composition is applied to a letterpress, flat plate, intaglio, screen, gravure ink, and writing instrument ink.