JP2013075508A - Scratch printed matter, scratch print medium, and method for manufacturing scratch print medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scratch printed matter which colors and visualizes a secret image by being scratched using a coin and is suitable for on-demand print, and to provide a scratch print medium to provide the scratch printed matter, and a method for manufacturing the scratch print medium.SOLUTION: The scratch printed matter includes: an underlayer 14 where a color ink is mixed with a white ink including an inorganic oxide particle for coin scratch to impart the mixed ink on a sheet body 11; and a negative printing layer 21 which is imparted to shape the secret image on the underlayer 14 using the same color ink for negative printing as the underlayer 14.

Description

  TECHNICAL FIELD The present invention relates to a scratch printed material that is made visible by coloring a secret image by rubbing with a coin, a scratch printing medium for providing the same, and a manufacturing method thereof, and more particularly, a scratch printed material having a configuration suitable for on-demand printing. Further, the present invention relates to a scratch printing medium for providing the same and a manufacturing method thereof.

  Even if characters or images (hereinafter simply referred to as “images”) are printed on white paper with white ink containing inorganic oxide particles such as hard titanium oxide, they cannot be seen as they are. On the other hand, when the printed part is rubbed with a coin, the coin is scraped by the inorganic oxide particles in the white ink to produce metal powder (file effect). This metal powder adheres to the printed part and turns black, and the image is visually recognized. become able to. Such a type of scratch printed material is obtained by coating a peelable aluminum paste on a printed image, and removing the aluminum paste with a coin so that the image can be visually recognized. It is hygienic because it does not cause scratches on the aluminum paste.

  By the way, the fluorescent whitening agent is included in the printing paper so as to increase the whiteness thereof, and when it is irradiated with ultraviolet light such as black light, the fluorescent light is emitted pale blue. On the other hand, white ink containing inorganic oxide particles such as titanium oxide does not transmit such ultraviolet light and does not emit fluorescence. Therefore, when the above-mentioned scratch printed matter is irradiated with ultraviolet light, an image printed with white ink floats black like a shadow while the printing paper emits light blue. That is, there arises a problem that an image can be visually recognized without rubbing the printed portion with a coin or the like.

  On the other hand, a so-called negative-type scratch printed matter has been developed in which white ink containing inorganic oxide particles is solidly coated on white paper and a coating (coating) is provided on the white paper to give an image. For example, in Patent Document 1, a negative type in which a base layer is solid-printed with a white ink containing titanium oxide on a paper medium, and a negative pattern is printed thereon so that an image is formed with a matte varnish containing at least a white agent. Scratch prints are disclosed. When such a scratch printed material is irradiated with ultraviolet light, the solid underprinted whole surface layer appears black while the printing paper emits light blue and white, but the image given by the negative pattern by the matte varnish cannot be visually recognized. On the other hand, when the image portion is rubbed with a coin, the metal powder of the coin adheres to only the white ink portion that is not coated with the varnish, and the image can be visually recognized.

  In the negative type scratch printed matter described above, the coating (coating) with transparent varnish or white ink is obtained by printing general ink or the like, unlike the white ink containing inorganic oxide particles unique to the scratch printed matter. . In addition, an image to be colored can be freely determined depending on how the coat is printed. In other words, if you are supplied with white ink-coated paper containing inorganic oxide particles, you can perform only the process of printing the coat separately in a place with general printing equipment, and freely color the image. The scratch print can be manufactured by determining. That is, on-demand printing is possible.

Japanese Patent No. 4577909

  In negative-type scratch prints, the border line between the solid ink printing with white ink containing inorganic oxide particles and the coat on it is colored, thus eliminating the color difference and gloss difference at the border line. Or have to be reduced. Especially in on-demand printing, the equipment and environment for coating can vary greatly, so that the color difference and gloss difference at the boundary can be kept within a certain range without strict printing conditions. is necessary.

  The present invention has been made in view of the situation as described above, and the object of the present invention is to make a confidential image colored by rubbing with a coin so that it can be visually recognized and to be suitable for on-demand printing. An object of the present invention is to provide a scratch printed material, a scratch printing medium for providing the same, and an on-demand printing method using the scratch printing medium.

  The scratch printed matter according to the present invention is a scratch printed matter that is made visible by coloring a secret image by rubbing with a coin, and is mixed with a white ink containing inorganic oxide particles for rubbing coins to mix the colored ink. And a negative printing layer provided so as to emulate the secret image with a negative color ink having the same color as that of the base layer.

  According to such an invention, the color difference that can be recognized at the boundary line of the secret image before rubbing is not greatly dependent on the printing state of the negative printing layer without suppressing coloring of the secret image due to rubbing with a coin. It is possible to provide a scratch print having a configuration suitable for on-demand printing.

  In the above-described invention, the colored ink may be a yellowish color. According to this invention, it is possible to easily give a color without losing the so-called file effect due to the inorganic oxide particles, and the color difference that can be recognized at the boundary line of the secret image before rubbing to the printing state of the negative printing layer. It is possible to provide a scratch print having a configuration suitable for on-demand printing, which can be more easily controlled within a certain range without greatly depending on it. In addition, the color change due to dry-down can be suppressed, and the manufacturing stability is excellent.

  In the above-described invention, the sheet body and the base layer may include at least one glossy layer provided by printing a line drawing or point drawing with the same color ink as the colored ink. Good. According to this invention, the gloss difference that can be recognized at the boundary line of the secret image before rubbing can be suppressed within a certain range without largely depending on the printing state of the negative printing layer, and is particularly suitable for on-demand printing. It is possible to provide a scratch printed matter having a configuration.

  In the above-described invention, the sheet body and the gloss layer may further include a camouflage image layer obtained by printing a line drawing or point drawing with at least two different colors of ink. . According to this invention, the color difference and gloss difference that can be recognized at the boundary line of the secret image before rubbing can be more easily suppressed within a certain range without greatly depending on the printing state of the negative print layer, It is possible to provide a scratch print having a configuration suitable for demand printing.

  The scratch printing medium according to the present invention is a scratch printing medium for on-demand printing to give a scratch printed material that can be made visible by coloring a secret image by rubbing with a coin, and is an inorganic oxide for coin rubbing. It is characterized in that a colored ink is mixed into a white ink containing particles to give a base layer on the sheet body.

  According to this invention, the color difference that can be recognized at the boundary line of the secret image before rubbing is not greatly dependent on the printing state of the negative printing layer without suppressing coloring of the secret image due to rubbing with a coin. Therefore, it is possible to provide a scratch printing medium for on-demand printing that can be suppressed within the above range.

  In the above-described invention, the colored ink may be a yellowish color. According to this invention, it is possible to easily give a color without losing the so-called file effect due to the inorganic oxide particles, and the color difference that can be recognized at the boundary line of the secret image before rubbing to the printing state of the negative printing layer. It is possible to provide a scratch printing medium for on-demand printing that can be more easily suppressed within a certain range without greatly depending on it. In addition, the color change due to dry-down can be suppressed, and the manufacturing stability is excellent.

  In the above-described invention, the sheet body and the base layer may include at least one glossy layer provided by printing a line drawing or point drawing with the same color ink as the colored ink. Good. According to this invention, there is provided a scratch printing medium for on-demand printing that can suppress a gloss difference that can be recognized at a boundary line of a secret image before rubbing within a certain range without greatly depending on a printing state of the negative printing layer. It can be provided.

  In the above-described invention, the sheet body and the gloss layer may further include a camouflage image layer obtained by printing a line drawing or point drawing with at least two different colors of ink. . According to this invention, the color difference and gloss difference that can be recognized at the boundary line of the secret image before rubbing can be more easily suppressed within a certain range without greatly depending on the printing state of the negative printing layer. A scratch printing medium can be provided.

  A method for producing a scratch printing medium according to the present invention is a method for producing a scratch printing medium for on-demand printing and giving a scratch printed matter that is made visible by coloring a secret image by rubbing with a coin, A base layer is formed by solid printing on a sheet body with a base ink in which a white ink containing inorganic oxide particles for coin rubbing is mixed with a contrast-reducing ink composed of a yellow color ink.

  According to such an invention, the color difference that can be recognized at the boundary line of the secret image before rubbing is not greatly dependent on the printing state of the negative printing layer without suppressing coloring of the secret image due to rubbing with a coin. It is possible to obtain a scratch printing medium for on-demand printing that can be suppressed within the range.

  In the above-described invention, the contrast-reducing ink may be further mixed with a color-enhancing ink made of a red color ink. According to this invention, it is possible to develop a deeper yellow color without reducing the so-called file effect, and the color difference that can be recognized at the boundary line of the secret image before rubbing greatly depends on the printing state of the negative printing layer. Thus, it is possible to obtain a scratch printing medium for on-demand printing that can be more easily suppressed within a certain range.

  In the above-mentioned invention, before giving the said foundation layer, it is good also as printing a line drawing or a point drawing with the ink of the same color as the said yellow color ink, and giving a gloss layer. According to this invention, there is provided a scratch printing medium for on-demand printing that can suppress a gloss difference that can be recognized at a boundary line of a secret image before rubbing within a certain range without greatly depending on a printing state of the negative printing layer. It is obtained.

  In the above-described invention, before providing the gloss layer, a camouflage image layer may be provided by printing a line drawing or dot drawing with at least two different colors of ink. According to this invention, the color difference and gloss difference that can be recognized at the boundary line of the secret image before rubbing can be more easily suppressed within a certain range without greatly depending on the printing state of the negative printing layer. A scratch printing medium can be obtained.

It is an external view of the scratch print according to the present invention before coloring a secret image. It is sectional drawing in the AA of FIG. It is an external view after the secret image coloring of the scratch printed matter by this invention. It is a manufacturing-process figure of the scratch printed matter by this invention. It is a figure which shows the manufacturing apparatus of the scratch printed matter by this invention.

  A negative-type scratch print according to an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the scratch sheet 100 offset prints a camouflage image 12, a glossy image 13, and a base layer 14 in this order on a printing paper medium 11, and further starts a negative pattern 21 from above. Is a scratch print obtained by printing at an on-demand printing destination. Here, the character “ABC” is regarded as the secret image 1 and is visible only after the secret image 1 is colored by rubbing with a coin (see FIG. 3).

  The camouflage image 12 is given by offset printing a line drawing or dot drawing with at least two different colors of ink such as red, blue, and black and white violet. For example, a pattern in which a number of fine alphabet characters are arranged with black and white violet ink on a paper medium 11 is printed, and then a polka dot pattern is printed with blue and red inks.

  The glossy image 13 is given by offset printing by overlaying a line drawing or point drawing at least once with colored ink. For example, a repetitive pattern such as a tile pattern is offset-printed from the top of the camouflage image 12 with yellow ink to give a first glossy image 13a, and from there, the first glossy image 13a is printed with the same yellow ink. The second glossy image 13b is obtained by offset printing by slightly shifting the position so as not to overlap the pattern.

  The underlayer 14 is solid-printed with a base ink obtained by mixing a white ink with a mixed ink obtained by adding inorganic oxide particles such as alumina, silica, and titanium dioxide, and a colored ink containing a colored pigment, or will be described later. Thus, a line drawing or dot drawing is printed to prevent omission of on-demand printing. In particular, in order to color the secret image 1 deeply, it is preferable to provide a thicker base layer 14 while containing more inorganic oxide particles in the surface layer using the base layer 14 as a multilayer. Here, the underlayer 14 is composed of two layers of a first underlayer 14a and a second underlayer 14b, and a yellow pigment is added to white ink in which titanium dioxide is added on the glossy image 13 to give a so-called file effect. A base ink mixed with a yellow colored ink containing a solid is printed by offset printing to give a first base layer 14a, and further, the oil content is higher than that of the first base layer 14a and the amount of titanium dioxide is increased. The ink is printed by offset printing, solid printing, line drawing, or dot drawing to give the second underlayer 14b. By providing the second underlayer 14b having a higher oil content on the first underlayer 14a, the mottling and the piling of the underlayer 14 can be suppressed. It should be noted that the first underlayer 14a and the second underlayer 14b are made to be line drawings or dot drawings, and are given a slight shift so as to be substantially solid, thereby preventing a drop in on-demand printing described later. May be.

  Here, the base ink is in mass%, 45 to 58% of the titanium dioxide particles together with the pigment component, 5 to 16% of the synthetic resin as the resin component, 5 to 16% of the mineral oil as the oil component, and 5 to 5% of the vegetable oil. It is an ink in which 10 to 80 g of yellow ink for offset is mixed with 1 kg of white ink containing 10% and containing 5 to 10% of a matting agent for gloss adjustment. In addition, a total of less than 1% of a desiccant and a film strengthening agent and less than 1% of a dry film formation inhibitor may be appropriately included. Ink containing a large amount of titanium dioxide particles gives a mat-like print. However, when the titanium dioxide particles in the white ink are contained in an amount of 50% or more by mass%, the mat-like print is particularly remarkable.

  As the base ink, a colored ink containing a colored pigment of another color such as a red pigment or a blue pigment may be added to the white ink. However, it is preferable to develop a yellow color in a colored ink containing a yellow pigment because it can be assimilated with the negative pattern 21 by on-demand printing described later with a smaller amount of colored ink. That is, the so-called file effect due to titanium dioxide is not lost, and printing loss such as peeling is less likely to occur. Furthermore, the color change due to dry-down can be suppressed and the production stability is enhanced.

  Further, it is preferable to add a color-enhancing ink that darkens the color tone to the colored ink. For example, when a red color ink containing a red color pigment is added to a yellow color ink as a color-enhancing ink, the underlayer 14 becomes a darker yellow color. Therefore, it is possible to increase the yellowish color development without reducing the relative content of the inorganic oxide particles in the underlayer 14, and it becomes easier to assimilate the appearance with the negative pattern 21. That is, the base layer 14 more suitable for on-demand printing can be printed without reducing the so-called file effect.

  As shown in FIGS. 1 and 3, the negative pattern 21 is printed at the on-demand printing destination with, for example, a negative ink having the same color as the base ink so as to represent the secret image 1 of the character “ABC”. Given. The negative ink is a general printing ink, and is an ink of the same color as the base ink, and is preferably prepared so that the color tone can be printed as much as possible. That is, in the gap 21a of the negative pattern 21, the underlying layer 14 of the same color is bare (see particularly FIG. 2), but the secret image 1 cannot be visually recognized. Here, the negative ink is a yellow ink containing a yellow pigment. By providing the base layer 14 and the negative pattern 21 with a yellow color, it is easy to assimilate the appearance by human eyes even if there is a slight color difference. On the other hand, if the color is yellow, the color difference from the confidential image 1 that is abraded with coins and colored black is increased, and the colored confidential image 1 can be easily visually recognized. Further, when the negative pattern 21 is poorly fixed by on-demand printing, the second base layer 14b, or in addition to this, the first base layer 14a is used for line drawing or dot drawing, so that the on-demand printing can be performed. Dropping can be prevented.

  In addition, on the negative pattern 21, you may give the line drawing or dot drawing which consists of any one or more of the red color which consists of a red, blue, or black-and-white dot, or dot drawing. Such a line drawing or point drawing is preferable because the confidential image 1 can be made more invisible.

  As described above, when the confidential image 1 is rubbed with coins, the scratch sheet 100 causes a so-called file effect by the base layer 14 through the gap 21a of the negative pattern 21 to generate metal powder. Such metal powder adheres to the portion of the secret image 1 and colors it in black so that the secret image 1 can be visually recognized (see FIG. 3). Here, the underlayer 14 is provided by two layers, a first underlayer 14a and a second underlayer 14b, and the metal powder generated in the first underlayer 14a having a higher file effect is converted into the first underlayer 14a and the second underlayer 14a. It is held by two layers of the underlayer 14b and is colored more intensely.

  In addition, the scratch sheet 100 irradiates ultraviolet light such as black light on the front side or transmits the paper medium 11 so that the entire underlayer 14 becomes a shadow and the secret image 1 is visually recognized. It is not possible.

  In addition, the scratch sheet 100 has an appearance assimilation of the underlayer 14 and the negative pattern 21 by the gloss image 13 having a higher gloss than the underlayer 14 even when the yellow ink in the undercoat ink is reduced. Gloss assimilation can be achieved. Further, the assimilation of the appearance can be further achieved by making the second base layer 14b a line drawing or a point drawing. In addition, when the red color increasing ink is added to the yellow color ink, the amount of the colored ink is reduced while maintaining the color density of the underlayer 14, and the titanium dioxide particles are relatively increased. You can also.

  Further, the camouflage image 12 is formed by printing a line drawing or dot drawing with at least two or more different colors of ink, so that the visual assimilation of the underlayer 14 and the negative pattern 21, particularly the color assimilation, can be achieved. is there. That is, it is possible to more reliably prevent the confidential image 1 from being visually recognized without being scratched by coins.

  Next, the manufacturing method of the scratch sheet 100 which is the scratch printed matter by this invention is demonstrated along FIG.

  The above-described camouflage image 12, gloss image 13 and underlayer 14 are printed on the surface of the paper medium 11 using an offset printer 30 as shown in FIG. 5 (on-demand scratch paper manufacturing step: S1). When the offset printing machine 30 is a five-cylinder type, the camouflage image 12 is obtained by the first cylinder 31, the second cylinder 32, and the third cylinder 33, and the glossy image 13 is obtained by the fourth cylinder 34 and the fifth cylinder 35. Each is printed in an overlapping manner (pre-processing printing step: S11).

  More specifically, in order to give the camouflage image 12, the ink tank of the first cylinder 31 is black and white ink, the ink tank of the second cylinder 32 is blue ink, and the ink tank of the third cylinder 33 is red. The ink tanks of the fourth cylinder 34 and the fifth cylinder 35 are filled with yellow ink to give the gloss image 13, and the camouflage image 12 and the gloss image 13 are printed, respectively. If necessary, spray powder may be sprayed on the camouflage image 12 and the glossy image 13 at the paper discharge unit D to prevent set-off.

  After elapse of a predetermined time, the base layer 14 is printed with the base ink (base printing step: S12). Specifically, the ink tanks (not shown) of the first cylinder 31, the second cylinder 32, and the third cylinder 33 are emptied, and the ink tanks (not shown) of the fourth cylinder 34 and the fifth cylinder 35 are described above. Each of the base inks is filled, and after confirming that the glossy image 13 is sufficiently dried, printing is started. Accordingly, the spray powder spread in the pretreatment printing step S11 can be removed by the first cylinder 31, the second cylinder 32, and the third cylinder 33, and the fourth cylinder 34 and the fifth cylinder 35 can be piled. Can be suppressed, and the underlayer 14 can be printed stably. Note that it is preferable to leave the glossy image 13 for about 2 to 3 hours after printing, if it is indoors, before the start of printing. Further, when the first cylinder 31, the second cylinder 32, and the third cylinder 33 using ink of a color other than yellow are used in the pretreatment printing step S11, the ink tanks are used after being carefully washed. Is preferred.

  Such scratch printing paper is shipped to a printing facility different from the facility of the offset printing machine 30, and the confidential image 1 can be appropriately determined at the shipping destination and printed (on-demand printing step: S2).

  Next, in the printing facility that receives the supplied scratch printing paper, the negative pattern 21 is printed on the shipped scratch printing paper using an on-demand printing machine, for example, an electrophotographic digital printing machine. (Negative printing step: S21). Further, the negative pattern 21 may be printed using a home printing facility such as a commercially available toner printer. Although it is preferable to print the negative pattern 21 after the underlayer 14 has been sufficiently dried, this is generally performed after the scratch printing paper is shipped to the printing facility and before the negative pattern 21 is printed. It is dry.

  Further, if necessary, a line drawing or dot drawing composed of one or more of red, blue, or black and white dots or a plurality of dots may be provided to cause crystallization (hidden image printing step: S22). .

  According to the above-described embodiment, it is possible to obtain a scratch printed matter that determines the secret image 1 and makes it visible without requiring special equipment at the on-demand printing destination.

  As mentioned above, although the typical Example by this invention was described, this invention is not necessarily limited to this, A person skilled in the art will be able to perform various without departing from the gist of the present invention or the scope of the appended claims. Alternative embodiments and modifications may be found.

DESCRIPTION OF SYMBOLS 11 Paper medium 12 Camouflage image 13 Glossy image 14 Underlayer 21 Negative pattern 30 Offset printing machine 100 Scratch sheet

Claims (12)

It is a scratch print that makes it possible to visually recognize a secret image by rubbing with a coin,
A base layer provided on a sheet body by mixing colored ink into white ink containing inorganic oxide particles for coin rubbing,
A scratch printed matter comprising: a negative print layer provided thereon so as to imitate the secret image with a negative color ink of the same color as the base layer.   The scratch printed matter according to claim 1, wherein the colored ink is a yellow color.   3. The glossy layer of at least one layer provided by printing a line drawing or dot drawing with the same color ink as the colored ink is provided between the sheet body and the base layer. Scratch printed matter described in 1.   4. The scratch according to claim 3, further comprising a camouflage image layer provided by printing a line drawing or dot drawing with at least two different colors of ink between the sheet body and the glossy layer. Printed matter.   A scratch printing medium for on-demand printing and giving a scratch print that makes a confidential image visible by rubbing with a coin, and a colored ink is applied to white ink containing inorganic oxide particles for coin rubbing. A scratch printing medium comprising a base layer provided on a sheet body by mixing.   6. The scratch printing medium according to claim 5, wherein the colored ink is a yellow color.   7. The glossy layer of at least one layer provided by printing a line drawing or dot drawing with the same color ink as the colored ink is provided between the sheet body and the base layer. The scratch printing medium as described in 1.   8. The scratch according to claim 7, further comprising a camouflage image layer provided by printing a line drawing or dot drawing with at least two different colors of ink between the sheet body and the glossy layer. Medium for printing. A method for producing a scratch printing medium for on-demand printing and giving a scratch printed matter that is made visible by coloring a secret image by rubbing with a coin,
For scratch printing, characterized in that a white ink containing inorganic oxide particles for coin rubbing is mixed with a contrast-reducing ink composed of yellow ink to give a ground layer on the sheet by solid printing. A method for manufacturing a medium.   10. The method for producing a scratch printing medium according to claim 9, wherein a color-enhancing ink made of a red color ink is further mixed into the contrast reducing ink.   11. The method for producing a scratch printing medium according to claim 10, wherein the gloss layer is formed by printing a line drawing or dot drawing with the same color ink as the yellow color ink before providing the undercoat layer.   12. The method for producing a scratch printing medium according to claim 11, wherein the camouflage image layer is provided by printing a line drawing or dot drawing with at least two different colors of ink before providing the gloss layer.

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