JP2011068748A - Ink composition for intaglio printing and printed matter using the same - Google Patents

Ink composition for intaglio printing and printed matter using the same Download PDF

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JP2011068748A
JP2011068748A JP2009220089A JP2009220089A JP2011068748A JP 2011068748 A JP2011068748 A JP 2011068748A JP 2009220089 A JP2009220089 A JP 2009220089A JP 2009220089 A JP2009220089 A JP 2009220089A JP 2011068748 A JP2011068748 A JP 2011068748A
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ink
composition
printed
ink composition
intaglio
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Takashi Ono
孝 小野
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National Printing Bureau
独立行政法人 国立印刷局
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an intaglio ink composition excellent in adhesion to both a substrate in which permeation of ink composition is not expected, such as plastics and a substrate in which the permeation of the ink composition is expected. <P>SOLUTION: The ink composition for intaglio printing at least includes an ultraviolet-curable composition, an oxidation-polymerizable composition, a photopolymerization initiator, an oxidative polymerization catalyst, and a polymerization inhibitor, wherein the blending ratio of the ultraviolet-curable composition to the oxidation-polymerizable composition is 92.5:7.5 to 85:15. The test result of the adhesive properties by JIS K-5600 is in the range of 0-1, that is, the rate of misalignment of print image lines is 5% or less. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an ink composition for intaglio printing and a printed matter using the same, and in particular, a security printed matter and an art printed matter, which are required to prevent counterfeiting or alteration such as banknotes, passports, securities, and postage stamps. The present invention relates to an intaglio printing ink that is used in the manufacture of the ink.

  Due to the nature of securities such as banknotes, stock certificates, bonds, various certificates and important documents, it is required that they are not easily counterfeited or altered. In order to meet such requirements, a printed matter such as banknotes is sometimes used by attaching a foil such as a hologram to the surface of the printed matter to enhance a security function for preventing forgery. However, with the rapid improvement in accuracy of electronic devices such as copiers and personal computers, it becomes possible to produce elaborate counterfeit prints, and by attaching similar aluminum foil etc. instead of holograms to authenticity There is a possibility that a near counterfeit printed matter may be manufactured, and a sufficient function for preventing forgery is not obtained.

  Therefore, in order to obtain a further anti-counterfeit effect for the printed matter with the hologram attached to the surface of the printed matter, an uneven structure is formed by forming an image line by printing on at least a part of the surface of the metal layer constituting the hologram. Has been disclosed (see, for example, Patent Document 1). This printed material reproduces the image line on the aluminum foil after the aluminum foil or the like is pasted on the printed material other than the hologram, but it is printed on the base material that cannot be expected to penetrate the ink such as the aluminum foil. It is difficult to reproduce the line. Furthermore, in order to improve the anti-counterfeit resistance, the security level is increased by increasing the thickness of the printed image line on the hologram.

  As a method for performing printing with a high film thickness, the applicant of the present application has applied for an ink using a component that is cured by ultraviolet irradiation and a component that is cured by oxidative polymerization, and a printed matter using the ink. Here, by using a vehicle in which an ultraviolet curable composition, an oxidation polymerizable composition, a photopolymerization initiator, and an oxidation polymerization catalyst are mixed, the surface of the printed image line after printing is cured by the energy of the irradiated ultraviolet rays, It is disclosed that the inside of a high-thickness ink is cured with an oxidative polymerizable composition to perform intaglio printing that reproduces a high-thickness image line (for example, see Patent Document 2).

  In addition, as a method of increasing the level of anti-counterfeiting by printing on the hologram, the printing layer is formed with a transparent or translucent ink by offset printing on the hologram with ultraviolet or electron beam curable ink. There has been disclosed a printed matter that is not restricted and has an improved anti-counterfeit effect (see, for example, Patent Document 3).

Japanese Patent No. 3053209 Japanese Patent No. 2113880 Japanese Patent No. 3025921

  However, since the printing method for forming the concavo-convex structure and the ink to be used are not disclosed in detail in the invention of Patent Document 1, if the printing method has few concavo-convexities, it may be easily forged. There is. Therefore, the ink printed on the hologram can improve the security level by having a bulge, but with a general ink, a high-thickness ink is applied to a base material that cannot be expected to penetrate the hologram layer or the like. When printed, there are problems such as poor drying.

  In addition, it is conceivable to use the ink of the above-mentioned Patent Document 2 as the ink of the above-mentioned Patent Document 1, but when printing on a hologram, distortion occurs on the adhesive surface with the substrate due to volume shrinkage during curing by ultraviolet curing. Therefore, it is conceivable that the adhesion to the substrate is inferior, and the adhesion to the substrate is actually inferior.

  In addition, in the invention of Patent Document 3, ink that is cured by irradiation with energy rays such as ultraviolet rays is used. However, since the ink printed on the hologram is a transparent and translucent ink, the ultraviolet rays to be irradiated reach the inside of the ink. Therefore, it is possible to cure a printed image line having a high film thickness. Therefore, in the case of using an ink containing a hue or material that absorbs irradiation energy, there is a problem that it is difficult to cure a printed image line having a high film thickness.

  In the above ink, the present inventors notice that the blending ratio of the ultraviolet curable composition and the oxidative polymerizable composition is deeply related to the adhesion to the substrate, and optimize the blending ratio. As a result, the inventors have obtained knowledge that excellent adhesion and curability can be realized with respect to both the hologram layer in which ink permeation cannot be expected and the base material in which ink permeation can be expected. The present invention is based on such knowledge. Therefore, the present invention provides an intaglio printing ink composition having excellent adhesion and curability for both a hologram layer in which ink permeation cannot be expected and a substrate in which ink permeation can be expected. The purpose is to provide the printed matter used.

  The intaglio printing ink composition of the present invention is an intaglio printing ink composition comprising at least an ultraviolet curable composition, an oxidation polymerizable composition, a photopolymerization initiator, an oxidation polymerization catalyst, and a polymerization inhibitor, The blending ratio of the ultraviolet curable composition and the oxidative polymerizable composition is 92.5: 7.5 to 85:15 on a mass basis, and the intaglio ink composition can be expected to penetrate the ink. A range of 0 to 1 in the classification of the results of the printed image printed on both the material and the substrate that cannot be expected to penetrate the ink in the adhesion test (cross-cut method) of JIS K-5600, The ink composition for intaglio printing is characterized in that the degree of omission of printed image lines is 5% or less.

  Moreover, it is the printed matter characterized by carrying out base printing of the ink composition for intaglio printing of this invention.

  The base material that can be expected to penetrate the ink used in the printed material of the present invention is a printing paper, and the printed material is characterized in that the base material that cannot be expected to penetrate the ink is a hologram.

  Moreover, the printed matter using the ink composition for intaglio printing of the present invention is characterized by being used as a forgery-preventing printed matter and / or an authenticity distinguishing printed matter.

  The ink composition for intaglio printing according to the present invention comprises a base material and an ink which cannot be expected to permeate ink, such as a plastic sheet, by setting the blending ratio of the ultraviolet curable composition and the oxidation polymerizable composition within the above range. There is an effect that intaglio printing that reliably adheres to both of the base materials that can be expected to penetrate is possible.

  Moreover, since the intaglio printing with a high film thickness can be performed on the substrate including the hologram by using the above intaglio printing ink composition, it is possible to produce an anti-counterfeit printed matter with a high security level. Play.

The figure which shows the classification | category of the test result in a cross cut test. The figure which shows the test result of the adhesiveness and sclerosis | hardenability in the image line on a hologram. The figure which shows the test result of the adhesiveness and sclerosis | hardenability in the image line on paper. The figure which shows evaluation of adhesiveness by the difference in the rubbing method of a tape. The figure which shows the level for examining the mixture ratio selected in this invention. The figure which shows the test result of the level shown in FIG. FIG. 3 is a diagram illustrating a printed matter in Example 1.

  Embodiments of the present invention will be described. The ink composition for intaglio printing in the present embodiment comprises an ultraviolet curable composition, an oxidation polymerizable composition, a photopolymerization initiator, an oxidation polymerization catalyst, a polymerization inhibitor, and a pigment as essential components. In general, it is produced by kneading by a known method using an apparatus such as a bead mill.

  As a pigment used for the intaglio printing ink composition of the present embodiment, when the ultraviolet curable composition or the oxidation polymerizable composition is an acidic substance having a carboxyl group, a basic pigment such as calcium carbonate is used. Although it cannot be used, other neutral or acidic pigments used in generally known UV-curable ink compositions can be used. In the case where the ultraviolet curable composition or the oxidative polymerizable composition is a neutral substance having no carboxyl group, there is no limitation on the pigment, and all the pigments used in generally known ultraviolet curable ink compositions are used. can do. Also, generally known UV-curable ink compositions are difficult to mix in large amounts of pigments that easily absorb UV rays, but the intaglio printing ink composition of the present embodiment has the presence of an oxidation polymerizable substance. As a result, the inside of the uncured printed image line is dried, so that even a pigment that easily absorbs ultraviolet rays can be mixed in a large amount.

  The ink composition for intaglio printing in the present embodiment has a curing shrinkage ratio at the time of curing of the ultraviolet curable composition by setting the blending ratio of the ultraviolet curable composition and the oxidation polymerizable composition within the above range. It is possible to reproduce the oxidative polymerization drying which reduces and internally drys the printed film. As a result, good adhesion and drying properties are obtained for both a base material such as a plastic film that cannot be expected to penetrate the intaglio printing ink composition and a base material such as printing paper that can be expected to penetrate the ink. Is.

  The ink composition for intaglio printing according to the present embodiment contains a compound component having a photopolymerizable double bond, whereby the film surface of the ink composition on the paper is cured by ultraviolet irradiation, and the uncured ink composition Since the compound having a photopolymerizable double bond is gradually polymerized by radicals generated by the oxidatively polymerizable composition and the oxidative polymerization catalyst, the ink inside can be completely dried.

  Furthermore, the intaglio printing ink composition of a preferred embodiment of the present invention contains a vehicle such as an acrylate having a large intermolecular interaction as a main component. Compared with the conventional oxidation polymerization type intaglio printing ink composition consisting of a vehicle mainly composed of a dry oil, the ink is difficult to separate, and accordingly, the printed image line becomes remarkably sharp and the image quality is improved. Can do. For this reason, even if the same intaglio plate surface is used, the ink film can be made thicker than when a conventional oxidation polymerization type intaglio printing ink composition is used.

  In addition, the ultraviolet curable composition is preferably mainly composed of a water-soluble compound having a photopolymerizable double bond, but as a more preferable specific example, in the case of an aqueous wiping method, the photopolymerizable double bond is used. A water-soluble acrylate can be used as the water-soluble compound having a heavy bond.

  More specifically, an acid acrylate having an hydroxyl group such as an acid anhydride addition acrylate of bisphenol A type epoxy acrylate, an acid anhydride addition acrylate of phenol novolac epoxy acrylate, or an acid anhydride addition acrylate of dipentaerythritol pentaacrylate is used. An acrylate having a carboxyl group to which an anhydride has been added or an acrylate having a carboxyl group to which an acid anhydride has been added to a urethane acrylate having a hydroxyl group, polyethylene glycol diacrylate, polypropylene glycol diacrylate, polyglycerin epoxy acrylate or polyacrylate Water-soluble acrylates such as glycerin polyacrylate or acryloylmorpholine can be used. The use of polyglycerin polyacrylate is more preferable for preventing blocking.

  In addition, the oxidatively polymerizable composition is preferably a dry oil or a liquid material modified from a dry oil, but more preferred specific examples include a dry oil such as oil, a semi-dry oil such as soybean oil or rapeseed oil, and a semi-dry property. Liquid materials that are modified from oil can be used.

  As the photopolymerization initiator used in the intaglio printing ink composition of the present embodiment, various commercially available photopolymerization initiators can be used, and these can be used alone or in combination of two or more. it can. The amount used varies depending on the type of photopolymerization initiator. Moreover, you may add photopolymerization start adjuvant, such as ethyl 4-dimethylaminobenzoate or isoamyl 4-dimethylaminobenzoate.

  The oxidation polymerization catalyst used in the intaglio printing ink composition of the present embodiment uses metal compounds such as cobalt, manganese, lead and iron, cobalt borate, cobalt octylate, cobalt naphthenate and lead monoxide. can do.

  As the polymerization inhibitor, a known polymerization inhibitor can be used, and the amount added is generally 100 to 1500 ppm, although it varies depending on the type of polymerization inhibitor used.

  Next, production examples of the oxidation polymerizable composition and the ultraviolet curable composition used in the intaglio ink composition having good adhesion to the substrate of the present invention are shown.

  As the oxidatively polymerizable composition, oil, glycerin, lithium hydroxide, phthalic anhydride, xylene as an azeotropic solvent, heated for 5 hours at 230 degrees with flowing nitrogen, Only water was removed from the azeotropic mixture and the xylene was condensed back into the reaction system. Then, it heated at 230 degree | times and removed the xylene in a reaction system as much as possible, and obtained the oxidation polymerizable composition.

  As the ultraviolet curable composition, phenol novolac epoxy acrylate, tetrahydrophthalic anhydride, polyethylene glycol 400 diacrylate, dipentaerythritol monohydroxypentaacrylate and 4-methylhexahydrophthalic anhydride are mixed, and ultraviolet curable composition is obtained. Got.

  Next, in order to select an appropriate blending ratio of the oxidatively polymerizable composition and the ultraviolet curable composition, an intaglio ink composition was prepared using a three roll mill according to the following blending example. In addition, about the compounding quantity of a vehicle, it fixes to 58 mass% of the total compounding quantity of the whole ink, and changes the compounding ratio of an oxidatively polymerizable composition and an ultraviolet curable composition within the range, respectively, The adhesion and drying properties of the inks were evaluated.

Vehicle 58.00% by mass
Photopolymerization initiator 3.00% by mass
Oxidation polymerization catalyst 1.00% by mass
Polymerization inhibitor 0.04% by mass
Red pigment 7.00% by mass
Yellow pigment 4.00% by mass
Black pigment 6.00% by mass
Extender pigment 20.96 mass%

  The ink composition for intaglio printing produced with the above-mentioned blending ratio is evaluated for adhesion and curability to both a substrate such as a plastic sheet that cannot be penetrated by ink and printing paper that can be expected to penetrate ink. Therefore, intaglio printing was performed using a base material on which a hologram was affixed on high-quality paper so as to straddle the region including the hologram and the printing paper.

  For the evaluation of adhesion to the substrate, the blending amounts of the ultraviolet curable composition: oxidative polymerizable composition were 99: 1, 95: 5, 90:10, 85:15, 80:20, 70:30 and 60, respectively. : A printed matter is prepared using the intaglio printing ink composition in a ratio of 40, and adhesion is evaluated by a cross cut test (JIS K-5600) to evaluate the degree of dropout of the intaglio printing ink composition. It was.

  As a method for producing the base material, a laminator manufactured by Tester Sangyo Co., Ltd. was used for printing paper, and after attaching a hologram sheet, an adhesive tape was adhered to the corner, and the carrier layer of the hologram was peeled off to prepare a base material. About the adhesive tape, the cellophane adhesive tape (made by Nichiban Co., Ltd.) was used.

  For the production of the printing sample, a bar pattern-shaped intaglio image line was printed on the hologram and the printing paper portion affixed to the base material using a testing machine capable of producing an intaglio printing sample. As printing conditions in the testing machine, the printing pressure was 130 kg / cm, and the ink surface was cured immediately after printing using an ultraviolet irradiation device. Thereafter, the printed samples were left in the dark for 1 week, 1 month and 3 months.

  As a method for evaluating adhesion, a multi-cross cutter (model 295 manufactured by Eriksen) conforming to JIS K-5600 was used, and six cuts with a 1 mm interval cut were made in a direction perpendicular to the image printed in a bar pattern, After making 24 cuts in the direction, the adhesive tape was pasted on the intaglio printing line. Thereafter, the peeling angle of the adhesive tape was set to 60 °, the tape was peeled off over about 0.5 to 1 second, and the adhesion on the intaglio image line on the hologram and the printing paper was evaluated.

  As an evaluation standard of adhesion, in order to evaluate the intaglio image line peeled off by the adhesive tape, it was observed visually and using a scale loupe. As a result, the evaluation was performed by setting the degree of dropout of the image stepwise to 0 when the cut edge was completely smooth and the ink adhesion to the tape could not be confirmed. The evaluation criteria are as shown in FIG.

In the adhesion test, the degree of adhesion to the print sample is important. In the normal cross-cut test, the tape is rubbed up and down and left and right for about 5 seconds with the fingertips. As another rubbing method, a rubbing load of 1 kg, a friction frequency of 100 reciprocations, and a friction cloth using a Gakushin type friction tester. Using a sample with adhesive tape adhered under the conditions using Kin No. 3 (JIS L-0803) and a laminator manufactured by Tester Sangyo Co., Ltd., a pressure roll of 3 kgf / cm 2 and a feed roll speed of 0.6 m / min (normal temperature The tape peel test was also performed on the sample that was pressed in step (1).

  In addition, as an evaluation of the curability of the intaglio ink, the curability was evaluated by evaluating the blocking property generated when the intaglio printed matter whose ink surface was dried by irradiation of ultraviolet rays was loaded. As an evaluation method, a printing sample printed using a printing plate having an intaglio image line depth of 100 μm is irradiated with ultraviolet rays, and a paper is placed on the surface of the printed material immediately after the surface of the printed image line is cured. The plate was left for one week in a state where a load assuming the weight of the stacked state was applied. Then, the tension at the time of peeling the printed material and the paper was measured, and the blocking suitability of the printed material was evaluated. It should be noted that an allowable range of blocking characteristics in which a general printed matter is stacked and a blocking phenomenon does not occur is 20 gf or less, and preferably 15 gf or less.

  First, evaluation results of adhesion and blocking properties will be described with reference to FIGS. 2 and 3 are graphs in which the X-axis is the blending ratio of the oxidative polymerizable composition, the Y1-axis is adhesiveness, and the Y2-axis is blocking characteristics (gf). FIG. FIG. 3 shows the evaluation result of the printed image line on the printing paper. For the print samples, the blending amounts of the UV curable composition: oxidative polymerizable composition described above were 99: 1, 95: 5, 90:10, 85:15, 80:20, 70:30, and 60:40, respectively. An intaglio printing ink composition having a ratio of 1 to 5 was used, and a sample on which a bar pattern was printed so as to include the area of the paper on which the hologram was affixed to the area of the paper on which the hologram was not affixed was used. About the method of rubbing an adhesive tape, the method of rubbing an adhesive tape with a fingertip for about 5 seconds was used as a method based on JIS K-5600.

  Regarding the adhesion, when the oxidative polymerizable composition is 5% by mass or less, the ink is not cured, and most of the intaglio printing image lines drop out regardless of the difference between the image lines printed on the hologram or the paper. As a result. In addition, when the blending ratio exceeds 20% by mass, the image line on the hologram is noticeably dropped. Therefore, as for the adhesion, a range in which the blending ratio of the oxidatively polymerizable composition was 5% by mass to 20% by mass was a good result.

  In addition, the blocking property is the result that the surface curability of the printed image line is impaired as the blending ratio of the oxidatively polymerizable composition increases, regardless of the difference between the image lines printed on the hologram or on the paper. The peel strength of the paper on which the blocking phenomenon occurred also tended to increase. When this was compared with the permissible range value of the peel strength at the time of normal intaglio printing, it was found that a blocking characteristic of 15 gf or more was obtained when the oxidation polymerizable composition was blended by 20% by mass or more. Therefore, about the blocking characteristic, it became the result which satisfy | fills all levels of sclerosis | hardenability by making the mixture ratio of an oxidation polymerizable composition into 20 mass% or less.

  Based on the above results, the blending ratio of the oxidatively polymerizable composition satisfying the adhesion and curability was 5 to 20% by mass. However, the adhesive evaluation result may change depending on the degree of adhesion of the adhesive tape, and the tape rubbing method is likely to cause individual differences such as rubbing with the fingertips for about 5 seconds, which may affect the test results. FIG. 4 shows the result of testing the samples adhered by the above three methods including the method of rubbing with a fingertip. For the print sample, three types of samples with a blending ratio of the oxidative polymerizable composition of 5 mass%, 10 mass%, and 15 mass% were used, and the adhesion of the sample in which the adhesive tape was adhered by the three methods described above. Evaluation was performed.

  As shown in FIG. 4, as a result of evaluating samples in which the adhesion method of the adhesive tape was changed by the three methods, all the methods yielded the same result, and there was almost no adhesion of the printed image line to the peeled tape, and the image line was dropped. The result was also good for the degree. Therefore, it was judged that the method for adhering the adhesive tape does not affect the evaluation of the adhesion of the ink.

  From the test results so far, it has been found that good results can be obtained with respect to the curability of the ink by setting the oxidation-polymerizable composition in the range of 5% by mass to 20% by mass. Based on this result, as a JIS K-5600 test result, the critical point in the blending ratio of the oxidative polymerizable composition was determined in order to make the drop of the printed image line 5% or less.

  As the blending ratio, the ratio of the oxidatively polymerizable composition was set at an interval of 2.5% by mass up to 5 to 20% by mass, and the adhesiveness of the 7-level samples was evaluated. The blending ratio at each level is shown in FIG. In addition, about the evaluation method of adhesiveness, the method as above-mentioned was used, and about the rubbing method of an adhesive tape, using a Gakushin type friction testing machine, 1 kg of rubbing load, the frequency | count of friction 100 reciprocations, and friction cloth kanakin No. 3 The conditions were set to use (JIS L-0803).

  The above test results will be described with reference to FIG. FIG. 6 is an evaluation of the degree of dropout of the intaglio image line by the evaluation method of FIG. 1. However, in order to perform more detailed division, the case where it is located in the middle of the evaluation results of 0 to 5 of FIG. Was evaluated as a center value (e.g., an evaluation of 0.5 for a dropout degree of 2-3%). As a result, as the evaluation that the degree of omission of the printed image line on the hologram exceeds 1, the evaluation is level 1, level 6, and level 7, and the evaluation of level 2, level 3, level 4 and level 5 is 1, that is, has dropped out. Since the image line was 5% or less, the blending ratio of the ultraviolet curable composition and the oxidative polymerizable composition of the present invention was 92.5% by mass: 7.5% by mass to 85% by mass: 15% by mass. It was confirmed that it was in the range.

  EXAMPLES Examples relating to the ink composition of the present invention will be described below, but the present invention is not limited thereto, and can be appropriately carried out within the technical scope described in the claims.

  As the oxidatively polymerizable composition of the intaglio ink composition, oil is mainly used as the main material, and as the ultraviolet curable composition, bisphenol A type epoxy acrylate is used as the main material, and blue intaglio printing is used. The ink composition was kneaded using a bead mill according to the following composition.

(Mixing ratio of intaglio ink composition in Example 1)
UV-curable composition 51.50% by mass
Oxidative polymerizable composition 6.00% by mass
Photopolymerization initiator 3.00% by mass
Oxidation polymerization catalyst 1.00 mass%
Blue pigment 11.50% by mass
Yellow pigment 2.30% by mass
Red pigment 2.20% by mass
Black pigment 1.50% by mass
Extender pigment 21.00% by mass

  As shown in FIG. 7, as a base material, a printed matter (1) in which OVD (2) is pasted on a part of a printed matter obtained by applying a printing pattern to high-quality paper, assuming a banknote or a gift certificate, The intaglio printing line (3) printed using the above intaglio ink composition was used so that the area where the OVD (2) was affixed and the area where the OVD (2) was not affixed were used. The film thickness of the intaglio image line (3) in the printed matter (1) was about 30 μm.

  As for the test method for the printed matter (1), the printed matter (1) printed by the above-described method is loaded in units of 5,000 sheets and left for one week to evaluate the curability of the ink composition. The blocking property was evaluated. As a result, no blocking was confirmed, and no reverse phenomenon to the back side of the paper was confirmed.

  Next, the adhesion to the printed material (1) was evaluated. As an evaluation method, as described in the embodiment, evaluation was performed by a cross-cut test. As for a specific evaluation method, a multi-cross cutter (model 295 manufactured by Eriksen) conforming to JIS K-5600 is used, and six in the direction perpendicular to the intaglio image line (3) printed with a 1 mm interval cut in a bar pattern shape. After making 24 cuts in the vertical direction, an adhesive tape was stuck on the intaglio printing line. As a method for bringing the tape into close contact, a method of rubbing it up and down and left and right with a fingertip for about 5 seconds is used. Thereafter, the peeling angle of the adhesive tape is set to 60 °, the tape is peeled off over about 0.5 to 1 second, and OVD (2 ) Evaluation was made on the adhesion of the upper and intaglio image lines (3) of the printed material (1).

  For the evaluation of the degree of omission of intaglio image line (3), input the image of intaglio image line (3) before tape peeling as the reference image, input the image after the tape peeling test, and input the reference image in advance. And the input image after tape peeling were subjected to pattern matching to obtain a difference image to determine the degree of dropout.

  As a result of conducting the above test, the intaglio image line (3) dropped out was about 2%. Therefore, the intaglio printing ink composition of Example 1 has an essential condition of the present invention of 5% or less. The ink composition had a degree of omission.

  The blending ratio of the ultraviolet curable composition and the oxidative polymerizable composition of the intaglio printing ink composition prepared in Example 1 is 89.5: 10.5, which is within the range shown in the embodiment. It can be seen that the results of the curability and adhesion of the intaglio ink composition, which are the effects of the present invention, are obtained. In the first embodiment, the intaglio image lines (3) regularly arranged are used, but the same effect can be obtained by printing in a shape such as a colored pattern or a figure.

1 Printed matter 2 Hologram 3 Intaglio printing line

Claims (3)

  1.   An ink composition for intaglio printing comprising at least an ultraviolet curable composition, an oxidation polymerizable composition, a photopolymerization initiator, an oxidation polymerization catalyst, and a polymerization inhibitor, the ultraviolet curable composition and the oxidative polymerization The blending ratio with the composition is 92.5: 7.5 to 85:15 on a mass basis, and the intaglio ink composition cannot be expected to permeate the base material and the ink which can be expected to permeate the ink. The printed image line printed on both sides of the substrate is in the range of 0 to 1 as a result of the JIS K-5600 adhesion test (cross-cut method), that is, the printed image line dropout degree is 5% or less. An ink composition for intaglio printing, comprising:
  2.   A printed matter, wherein the printed material is printed on the base material using the ink composition for intaglio printing according to claim 1.
  3.   3. The printed matter according to claim 2, wherein the base material that can be expected to penetrate the ink is printing paper, and the base material that cannot be expected to penetrate the ink is a hologram.
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2013139636A1 (en) 2012-03-23 2013-09-26 Sicpa Holding Sa Printing method with oxidative-drying intaglio ink and uv-vis-curable intaglio inks

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JP2002038065A (en) * 2000-07-25 2002-02-06 Printing Bureau Ministry Of Finance Resin composition for intaglio printing ink, ink composition made by using it and printed matter obtained therefrom
JP2007145962A (en) * 2005-11-28 2007-06-14 National Printing Bureau Intaglio printing ink composition and manufacturing process of intaglio printed matter
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