JP4549804B2 - Inkjet printed matter - Google Patents

Description

  The present invention is printed so as to conceal the contents, such as a lottery, and information cannot be seen with eyes in the state of printed matter, but printed by rubbing, scratching, etc. with coins The present invention relates to a printed matter that can make information visible (visualization).

Conventionally, a scratch printed material has been adopted as a kind of this type of printed material. In this method, a concealing layer is formed by silk screen printing using silver ink on an image to be concealed. However, when the concealing layer is removed by rubbing with a coin or the like, there is a problem that fingers and the like are soiled or scraped, which is not preferred.
As a printed matter that solves this problem, a character or design image printed with an ink containing a material having a hardness higher than that of the metal of the coin on the printing substrate, i.e., without providing a concealing layer and rubbing the printed portion, There is one that utilizes the fact that the metal is scraped, and the printed portion is colored by the scraped metal, so that it can be visually recognized more clearly. For this, prior documents such as Patent Document 1 and Patent Document 2 are known.

In Patent Document 1, an image is printed on a printing substrate with an ink composition containing a material having a hardness higher than that of a metal of a coin, and a colored image appears by rubbing, scratching, or the like with a coin. It relates to the printed matter. Patent Document 2 is similar to the above, but describes a printed material that is improved so that the printed material is formed with uniform halftone dots, and that makes it difficult to discriminate in a state where the printed material is not visualized.
Further, regarding serial number or serial number printing described in claim 3 of the present application, conventionally, when a lottery number or the like is printed on a lottery or the like, a special number printing device as in Patent Document 3 is usually used. Although not a lottery or the like, Patent Document 4 describes an example in which a non-impact printer is used when a card number is provided on a card.

Japanese Patent Publication No. 6-78039 JP-A-6-171277 JP 2004-206534 A Japanese Patent Laid-Open No. 10-236038

  The printed matter of Patent Literature 1 and Patent Literature 2 is so-called plate-based printing on the premise that printing is performed by a plate type such as offset printing or gravure printing. In the case of plate printing, since a printing plate is indispensable, there is a problem that a load is increased in terms of productivity and cost. For printed matter such as lotteries, there are many orders for small lots, so if it can be manufactured by ink jet printing that can directly output data from a block, a positive film, or a personal computer (PC), it can contribute to productivity improvement and cost reduction.

Further, in printed materials such as lotteries, there are cases where it is desired to provide a different serial number or serial number for each lot in order to confirm the validity of the printed material and prevent counterfeiting.
In the case of plate printing, serial numbers cannot be printed. To provide them in a concealed state, once the serial number is printed on the base material in a method that allows data output printing, scratch printing is performed in a separate process. And concealment processing such as crystal prints. The former is a type in which concealing ink such as silver or gold is scraped with a coin, and is manufactured by screen printing. The latter is a type in which the concealing ink is peeled off with an adhesive tape, and is manufactured by sheet-fed gravure printing or the like.
If a special printing apparatus is used as in Patent Document 3 or an impact printer is used as in Patent Document 4, the complexity of the process and cost problems cannot be avoided.
Accordingly, the present invention has been completed by studying the completion of a printable image without using a printing plate, in particular, a printed material having a serial number or serial number, in a single printing process.

The invention of claim 1 for solving the above-mentioned problems, the paper substrate on a coated paper which does not include a material having a high hardness than the metal of the coin, in ink jet printing ink comprising a material having a high hardness than the metal of the coin, The image is formed so that it is substantially the same color as the color of the base material and cannot be distinguished from the base material, and the printed part is colored with the metal of the scraped coin by rubbing, scratching etc. with the coin An ink-jet printed material characterized in that an image appears.

The invention of claim 2 for solving the above-in a first region on the paper substrate is a coated paper which does not include a material having a high hardness than the metal of the coin, including a material having a high hardness than the metal of the coin Ink-jet printing ink has an image that is substantially the same color as the base material and cannot be distinguished from the base material, and is equivalent to the metal of the coin in the other second region, or An image is formed with an ink containing a relatively soft material having a smaller hardness, and the printed portion is colored with the metal of the scraped coin in the first area by rubbing, scratching, etc. with a coin. An ink-jet printed material characterized in that an image appears.

  The invention of claim 1 or claim 2 may be printed with a serial number or serial number in addition to an image.

In the invention of claim 1, since the image that can be visualized is printed with the ink jet printing ink containing a material having a hardness higher than that of the metal of the coin, the image can appear by rubbing with the coin. Moreover, since the inkjet printed matter can be printed in one process without using a printing plate, it can contribute to productivity and cost reduction.
In the invention of claim 2, the image that can be visualized is printed in the first area with an ink jet printing ink containing a material having a hardness higher than that of the coin metal, and is equivalent to the coin metal in the other second area. In addition, since the image is formed of ink containing a relatively soft material having a hardness smaller than that, the hidden image can be made more difficult to see before the image appears. Moreover, since the said inkjet printed matter can be printed in one process, without using a printing plate, it can contribute to productivity and cost reduction similarly.
The invention of claim 3 is a case where the inkjet printed matter prints a serial number or serial number by inkjet printing in addition to an image, but even in this case, printing can be performed in a single process, which is similar to productivity and cost reduction. Can contribute.

FIG. 1 is a view showing an ink-jet printed matter according to the first embodiment of the present invention, and FIG. 2 is a view showing an ink-jet printed matter according to the second embodiment.
In the inkjet printed matter 1 of the first embodiment, as shown in FIG. 1A, an image 2 is formed on a base material 10 with an inkjet printing ink containing a material having a hardness higher than that of a coin metal. If necessary, a serial number or serial number (hereinafter also referred to as “serial number etc.”) 3 may be printed at the same time. The serial number means a number that is not necessarily consecutive but is given a different numerical value, and the serial number means a number that is given a different consecutive numerical value.

The serial number 3 is for the purpose of confirming the legitimacy of printed matter and preventing forgery. Alternatively, the serial number itself may be the winning number. The serial number or serial number 3 may be printed with colored ink instead of the latent image, but may be a latent image similar to the image 2 and can be used properly depending on the purpose. In the case of colored ink, printing can be performed once with a multicolor printing head.
In the case of FIG. 1, an example in which the serial number 3 is a latent image is shown.

  Image 2 and serial number 3, etc. are images 5 in which the coin is scraped by rubbing the surface with a coin or scratched, etc., and colored by coloring with the metal of the scraped coin, colored serial number or serial number 6 appears as shown in FIG. Since the image 2 and the serial number 3 are latent images before they are rubbed with coins and are preferably visually invisible, the image 2 and the serial number 3 have the same color as the base material 10. The surface gloss and the like are preferably the same as those of the substrate 10. Aluminum and copper coins can be used as coins.

In the example of the inkjet printed matter 1 of the second embodiment, a latent image is formed on the entire surface of the substrate 10 as shown in FIG. In the case of FIG. 2, it is a flat net, but it is not limited to this example, and a normal design such as a line drawing may be used. As shown in FIG. 2B, the image 2 is printed on the first region 7 surrounded by the two rings with ink jet printing ink containing a material having a hardness higher than that of the metal of the coin. In the second region 8, another image 4 is formed with ink containing a relatively soft material having a hardness equal to or smaller than that of the metal of the coin.
Although not shown in FIG. 2, if necessary, the serial number and the like may be simultaneously printed with ink containing a material having a hardness higher than that of the metal of the coin.

When the surface of the image 2 and the serial number, etc. are rubbed with a coin, a colored image 5 appears as shown in FIG. 2C. The image 4 has a hardness equal to or smaller than that of the coin metal. Since the image is formed with an ink containing a relatively soft material having, even if the surface is rubbed or scratched, the metal of the coin is not scraped off, so that the image is not colored.
It is the same as in the case of the first embodiment that the images 2 and 4 are in the same color as the base material 10 and cannot be visually recognized before the surface is rubbed with coins. As described above, the serial number 3 is used as a latent image or a colored image depending on the purpose. The image 2 and the image 4 can be configured by image lines or solid printing, but they may be provided with a flat mesh as shown in FIG. A flat screen is an image in which halftone dots and dots of a certain size are printed uniformly.
Since the image 2 is indistinguishable from the image 4 and makes it difficult to distinguish the latent image, it is preferable that the image 2 has a color tone and gloss that are close to each other. The image in the ink-jet printed material is not limited to the image formed only from the image 2 or the image 4 and may include other colored images as long as the image can be printed in the same ink-jet printing process. Make sure that the image is the same color.

In the first and second embodiments, titanium oxide, aluminum oxide, silicon dioxide, chromium oxide, or the like can be used as a material having a hardness higher than that of a coin metal. Table 1 shows the Mohs hardness of these materials. Generally, since printing is often performed on white paper, titanium oxide (TiO ₂ ), which is a white pigment, is often used.

Incidentally, the Mohs hardness of what is generally used as a hard metal material used for coins and the like is as shown in Table 2.

  Barium sulfate, calcium carbonate, aluminum hydroxide, kaolinite, talc, magnesium carbonate, organic pigments (white organic pigments, etc.), dyes, etc. are used as relatively soft materials with a hardness equivalent to or less than the metal of the coin be able to. Their Mohs hardness is as shown in Table 3.

Printing using an ink composition containing a material having a hardness higher than that of the metal of the coin is also performed by inkjet printing. This is because printing by data output is possible.
When printing on a white paper substrate, it is possible to use a white pigment, particularly a titanium oxide pigment as the material. The titanium oxide pigment may be a rutile type or an anatase type. However, in the ink jet recording method, since ink is generally discharged from an extremely fine discharge port, it is necessary to lower the viscosity of the ink, and there is a problem that the pigment will settle unless the pigment has a fine particle diameter. In general, a particle size of about 0.05 to 1.0 μm, preferably about 0.20 to 0.50 μm is preferable from the viewpoint of sedimentation and coloring. A relatively soft material having a hardness equivalent to or less than that of a coin metal such as barium sulfate or calcium carbonate can be used which has the same particle size or a slightly fine particle.
When printing on a colored paper base other than white, it is necessary to adjust the color with a dye or the like.

The water-based organic resin used in the ink-jet ink composition means a water-soluble or water-dispersible organic resin, and improves the dispersibility of pigments such as titanium dioxide pigment or barium sulfate, calcium carbonate, and aggregates dispersed particles. What has the function to prevent is preferable.
Examples of the resin include water-soluble acrylic resin, polyester resin, polyether resin, cellulose resin, polyamide resin, and polyvinyl alcohol resin. Natural polymers may also be used. Specific examples thereof include proteins such as gelatin, casein and albumin, and natural rubbers such as gum arabic.
These resins may be neutralized with a neutralizing material such as ammonia or amines. Examples of the amines include triethylamine, dimethylmethanolamine, monoethanolamine, and 2-amino-2-methylpropanol.

  The solvent for the ink composition used in the present invention is preferably composed of water and a water-soluble organic solvent. As the water, pure water such as ion exchange water, ultrafiltration water, distilled water, or ultrapure water can be used. Preferred water-soluble organic solvents include monohydric alcohols such as methanol, ethanol, isopropanol, and butanol, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, glycerin, trimethylol ethane. And polyhydric alcohols such as ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, and diethylene glycol monoethyl ether.

As the base material used in the present invention, a general paper base material such as coated paper, fine paper, coated ball, card paper, or base paper for the cup can be used. However, if the ink is sufficiently fixed, a white or colored plastic film It may be. In the case of a paper base material and coated paper, the coating layer is preferably made of a coating material that does not contain a material having a hardness higher than that of the coin metal.
Since a hard material is used for the imaging layer of ink-jet ink printing, when the hard material is also included in the coat layer, the coin is scraped on both sides when it is rubbed with a coin, reducing the coloring effect. This is because it becomes difficult to distinguish between the two.

<Manufacture of pigment dispersion>
After stirring and mixing 26.0 parts by weight of deionized water, 0.5 part by weight of 2-amino-2-methylpropanol, 11.0 parts by weight of a hydroxyl group-containing water-soluble acrylic resin, and 62.0 parts by weight of rutile titanium dioxide Then, dispersion was performed with a bead mill to obtain a white pigment dispersion composition I having an average particle size of about 0.32 μm.

<Manufacture of inkjet printing ink I>
Using the above-mentioned pigment dispersion composition I, a prescribed amount of the pigment dispersion is collected in a polyethylene cylindrical container according to the following composition, and deionized water, a solvent, a dispersant, and the surface while stirring with a disperser (disper) After sequentially adding the adjusting agent, the mixture was stirred until it became uniform.
[Combination]
Pigment dispersion composition I 32 parts by mass Deionized water 44 parts by mass Diethylene glycol 15 parts by mass Glycerin 10 parts by mass Dispersant and surface conditioner Trace amount

<Manufacture of inkjet printed matter>
The ink jet printing ink I obtained above was filled in an ink cartridge of an ink jet printer, and the latent image 2 and serial number 3 were printed on white paper as shown in FIG.
The paper used was Mitsubishi Paper Industries Co., Ltd. (“New V Matt” basis weight 310 g / m ² ). The printed latent image 2 and serial number 3 are inks that contain only a white pigment, and are difficult to visually recognize. When the image 2 and the serial number 3 obtained in this way were rubbed with a 1-yen coin (made of aluminum), the image turned black and became clearly visible.

<Manufacture of pigment dispersion>
48.0 parts by weight of deionized water, 1.0 part by weight of 2-amino-2-methylpropanol, 21.0 parts by weight of a hydroxyl group-containing water-soluble acrylic resin, 29.0 parts by weight of fine particle barium sulfate (Mohs hardness 2.6) After stirring and mixing, dispersion was performed with a bead mill to obtain Pigment Dispersion Composition II having an average particle size of about 0.20 μm.

<Manufacture of inkjet printing ink II>
Using the above-mentioned pigment dispersion composition II, according to the following composition, a specified amount of the pigment dispersion is collected in a polyethylene cylindrical container and stirred with a disperser (disper) while deionized water, solvent, dispersant and surface After sequentially adding the adjusting agent, the mixture was stirred until it became uniform.
[Combination]
Pigment Dispersion Composition II 40 parts by mass Deionized water 32 parts by mass Diethylene glycol 15 parts by mass Glycerin 10 parts by mass Dispersant and surface conditioner Trace amount

<Manufacture of inkjet printed matter>
The ink jet printing ink II obtained above and the ink jet printing ink I obtained in the previous Example 1 are filled in an ink cartridge of an ink jet printing machine, and a latent image 2 comprising a flat mesh as shown in FIG. Was printed on the first area of white paper, and image 4 was printed on the second area. The paper used was Mitsubishi Paper Industries Co., Ltd. (“New V Matt” basis weight 310 g / m ² ).
The printed flat mesh images are all inks containing only a white pigment, and are difficult to visually recognize. When the latent image 2 and the image 4 thus obtained were rubbed with a 1-yen coin (made of aluminum), the image 2 became black and clearly visible, but the image 4 was Since it was made of a pigment softer than metal, it did not turn black. Therefore, as a whole, a black annular image can be clearly seen as shown in FIG.

  As mentioned above, although the embodiment of the present invention has been described mainly for use by a lottery or the like, it is obvious to those skilled in the art that it can be applied to the answer column of a problem collection for learning and can be used as a material for play equipment such as a hidden picture. That is.

It is a figure which shows the inkjet printed material of 1st Embodiment of this invention. It is a figure which shows the inkjet printed material of the 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inkjet printed matter 2 Image 3 Serial number or serial number, serial number, etc. 4 Image 5 Colored image 6 Colored serial number or serial number 7 First area 8 Second area 10 Base material

Claims (3)

The coin of the paper substrate on a coated paper which does not include a material having a high hardness than the metal, in an inkjet printing ink comprising a material having a high hardness than the metal of the coin, a substantially color tone of the base material and the same color An ink-jet printed matter, wherein an image is formed so that the image cannot be distinguished from a base material, and an image appears by coloring a printed portion with a metal of a scraped coin by rubbing or scratching with a coin. In a first region on the paper substrate is a coated paper which does not include a material having a high hardness than the metal of the coin, in ink jet printing ink comprising a material having a high hardness than the metal of the coin, the substantially substrate tone 1 is formed so that it cannot be distinguished from the base material, and the other second region includes a relatively soft material having a hardness equal to or less than that of the metal of the coin. An ink-jet printed matter, wherein an image is formed by forming an image with ink and coloring a printed portion with a metal of a scraped coin in the first region by rubbing, scratching or the like with a coin.   The inkjet printed matter according to claim 1, wherein a serial number or a serial number is printed in addition to the image.

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