JP6518532B2 - Printed matter - Google Patents

Description

  The present invention relates to a printed matter, in particular, a printed matter used as a lottery ticket or the like.

  Printed matter used as a lottery ticket or the like is traded in large quantities, and different identification information is printed for each printed matter. The identification information is also referred to as optical reading information because the identification information is mainly read using an optical reading device.

  In this way, when producing a printed matter that is traded in large quantities and has individual identification information, the cost resulting from mass production and the adaptability to variable printing required for printing identification information are considered. The printing method and materials (paper base, ink) are appropriately selected. Among printing methods conventionally known, ink jet printing has a feature that can cope with variable printing and can also produce a large amount of printed matter, so that a lottery ticket or the like can be produced. It is a printing method suitable for printing identification information contained in printed matter.

  By the way, when producing printed matter by inkjet printing, it is ideal to use special paper for inkjet printing as a paper substrate of printed matter in consideration of suitability to the ink to be used. However, special-purpose paper for ink jet printing has a problem in cost because the unit price is high as compared with paper usually used as a printed matter to be distributed to the market in large quantities such as lottery tickets and the like. The special paper may not be used depending on the processing conditions of the printed matter and the intended use.

  On the other hand, there is a problem that the paper base, which is not a dedicated paper for inkjet printing such as high quality paper, is inferior in the fixability of the ink used in the inkjet printing as compared with the dedicated paper for the inkjet printing. For example, with respect to the portion printed on the paper substrate using a water-based ink for inkjet printing, there is a problem in water resistance because part of the portion is eluted when it comes in contact with water after printing. The water resistance can be improved by changing the ink used from a water-based ink for inkjet printing to a UV-curable ink, but the UV-curable ink has a higher unit cost than the water-based ink, and the manufacturing equipment is also expensive. Therefore, new problems will arise in terms of cost.

  Therefore, after using a relatively inexpensive material, that is, not a dedicated paper for inkjet printing but a widely used paper base and an aqueous ink for inkjet printing, the portion printed with the aqueous ink is protected. How to do that is being considered. Patent Document 1 discloses a method of providing a protective layer on a variable information printing area constituting printed matter such as securities.

JP, 2008-80698, A

  However, when providing the protective layer, if the protective layer has a gloss, the gloss becomes noise when the identification information (optical read information) is read by the optical reader, and the identification information is read. Had a problem of causing problems. In addition, a part of the ink used in forming the protective layer may penetrate into the paper base to cause strikethrough. Due to the occurrence of the strike through, part of characters, symbols and the like printed on the back side of the printed matter and the printed matter other than the printed matter may be seen from the front side of the printed matter. In this case, when the identification information printed on the surface of the printed matter is read using the optical reader, characters, symbols, etc. seen from the front side of the printed matter become noise due to the strike through, thereby causing identification information There was a problem that it interfered with reading.

  The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a printed matter capable of accurately reading printed identification information.

The printed matter of the present invention is a paper substrate,
A display layer provided in a partial area of one side of the paper substrate and displaying optical read information;
A protective layer covering at least the display layer;
A portion of the protective layer contacts the paper substrate;
The gloss of the protective layer is 7 or less,
It is characterized by satisfying the following formula (1).
{(X−y) / y} ≦ 15% (1)
(In the formula (1), x represents a transparency evaluation value in a portion of the surface of the paper substrate in contact with the protective layer, represented by the following formula (1-1). Y represents the following The transparency evaluation value in the part which is shown in Formula (1-2) and is not contacting the protective layer among the surfaces of a paper base material is represented.
x = (R2-R1) / R2 (1-1)
y = (R2-R3) / R2 (1-2)
In the above formulas (1-1) and (1-2), R1, R2 and R3 are as follows.
R1: The reflectance of the surface of the paper substrate in the area where the protective layer is provided, as measured with the black plate placed on the back side opposite to the surface side where the protective layer is provided on the paper substrate.
R2: reflection of the surface of the paper substrate in a region where the protective layer is not provided, as measured with the white plate placed on the back side opposite to the surface side where the protective layer of the paper substrate is provided rate.
R3: reflection of the surface of the paper substrate in the area where the protective layer is not provided, as measured with the black plate placed on the back side opposite to the surface side where the protective layer of the paper substrate is provided rate. )

  In the present invention, the optical reading information is preferably character information or an identification code read by optical character recognition.

  In the present invention, the display layer is preferably formed of a water-based ink.

  In the present invention, the protective layer is preferably formed of an ultraviolet curing ink.

  In the present invention, a printing layer may be provided on at least a part of the surface of the paper base opposite to the surface on which the display layer is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the printed matter which can read the printed identification information correctly can be provided.

It is a schematic diagram which shows the example of embodiment in the printed matter of this invention, (a) is a front view, (b) is a back view, (c) is a figure which shows the AA 'cross section in (a).

  Hereinafter, the present invention will be described in detail with reference to the drawings as appropriate.

FIG. 1 is a schematic view showing an example of an embodiment of the printed matter according to the present invention, wherein (a) is a front view, (b) is a back view, and (c) is a cross section along AA 'in (a). FIG. The printed matter 1 of the present invention comprises a paper substrate 10, a display layer 11 provided in the lower right region on the surface 10a side of the paper substrate 10, and a protective layer 20 provided on at least the display layer 11. Have. Moreover, the printing layer 12 is provided in the back surface 10b side of the paper base material 10 which comprises the printed matter 1 of FIG.

In the present invention, the display layer 11 may be provided on one side of the paper substrate 10, and is provided on the surface 10a side of the paper substrate 10 as shown in FIG. It may also be provided on the back surface 10b side of the paper base 10. In the present invention, the display layer 11 is provided in a partial area of one side of the paper substrate, but the area in which the display layer 11 is provided is particularly limited if the optical reading device can read. It is not something to be done. Furthermore, as shown in FIG. 1 (b), when the printing layer 12 is provided in addition to the display layer 11, the printing layer 12 only needs to be provided on the side opposite to the side on which the display layer 11 is provided. As shown in FIG. 1 (b), it may be provided on the back surface 10 b side of the paper substrate 10 or may be provided on the surface 10 a side of the paper substrate 10.

  Hereinafter, each member which comprises the printed matter 1 of FIG. 1 and its formation method are demonstrated.

  It will not be specifically limited if it is a paper material which can print the display layer 11 mentioned later as a paper base material 10 which comprises the printed matter 1 of FIG. Specifically, high-quality paper, KYP paper (manufactured by Nippon Paper Industries), HNT paper (manufactured by Oji F-Tex), etc. can be used. In addition, since the printed matter 1 of FIG. 1 is to be traded in a large amount, it is preferably high quality paper in consideration of cost.

  The display layer 11 constituting the printed matter 1 of FIG. 1 is, for example, a member which is provided at one or a plurality of places in a partial region on the surface 10a side of the printed matter 1 of FIG. The optical reading information mentioned here is information for identifying other printed matter that can be read using an optical reading device, and more specifically, characters such as numbers, kanji, kana, symbols or figures or It is a combination of these. The optical reading information includes, for example, characters read by optical character recognition, and an identification code. Examples of the identification code include a one-dimensional code and a two-dimensional code. Examples of one-dimensional codes, which are a type of identification code, include barcodes such as CODE 39, CODE 128, JAN, and ITF. Further, as a two-dimensional code which is a kind of identification code, for example, QR code (registered trademark), PDF 417, data matrix, CP code, MaxiCode, etc. may be mentioned. In the present invention, either a character or an identification code to be read by optical character recognition may be selected and used, or a character and an identification code to be read by optical character recognition may be used in combination.

  In the present invention, the ink used when forming the display layer 11 is not particularly limited, but it is preferable to select and use an ink which is not eluted in the ink used when forming the protective layer 20. In addition, it is particularly preferable to use a water-based ink which is superior in cost, from the fact that the printed matter 1 of FIG. 1 is traded in large quantities. In the present invention, either a dye ink or a pigment ink can be used as the water-based ink used to form the display layer 11, but the pigment ink is used in terms of density and durability. preferable.

  The printing method of the display layer 11 is not particularly limited as long as it is a printing method that can use water-based ink, and specifically, an inkjet printing method and the like can be mentioned.

  The protective layer 20 constituting the printed matter 1 of FIG. 1 is a member that covers at least the top of the display layer 11. In the present invention, for the purpose of preventing the ink constituting the display layer 11 from eluting from the side surface of the display layer 11 due to an external factor such as water, all of the display layer 11 which exposes the protective layer 20, specifically Preferably, the upper and side surfaces of the display layer 11 are covered. Thus, the display layer 11 can be protected from external factors such as water by providing the protective layer 20 so as to cover the upper surface and the side surface of the display layer 11.

  However, when the protective layer 20 is provided in a wide range, for example, most of the surface side 10 a of the paper base 10 including the area where the display layer 11 is provided, the thickness or slip of the printed matter 1 itself changes or curling occurs. It becomes easy to do. For this reason, in the present invention, it is preferable to selectively provide the protective layer 20 in the region where the display layer 11 is provided and the region around it.

  As described above, since the protective layer 20 may be provided not only on the display layer 11 but also on the periphery of the display layer 11 for the purpose of protecting the display layer 11, a part of the protective layer 20 may be a paper substrate. It will be in the state of being in contact with 10.

  By the way, the printed matter 1 of FIG. 1 can be distinguished from other printed matter by reading the optical reading information displayed on the display layer 11 by the optical reading device. Therefore, in the present invention, the protective layer 20 needs to be a member that does not interfere with the reading of the optical reading information by the optical reading device.

  When providing the protective layer 20, the gloss of the protective layer 20 and the ink used in forming the protective layer 20 penetrate the paper substrate 10 as a factor that causes trouble in reading the optical reading information by the optical reading device. There is a strike-through caused by

  The gloss of the protective layer 20 is generated by the protective layer 20 reflecting light such as visible light. Here, when the protective layer 20 reflects light (visible light, infrared light, etc.) used in reading optical read information, not only the optical read information but also the reflected light from the protective layer 20 is sensed by the optical reader. Resulting in. At this time, light reflected from the protective layer 20 contributes to noise during image processing performed after reading.

  In the present invention, the glossiness of the protective layer 20 is 7 or less. Here, when the glossiness of the protective layer 20 exceeds 7, the optical reader can also read the protective layer 20 itself when reading the optical reading information. Here, when the glossiness of the protective layer 20 is 7 or less, the gloss of the protective layer 20 is substantially the same as the gloss of the paper base 10 in the area where the protective layer 20 is not provided. In the present invention, the glossiness of the protective layer 20 is preferably 6 or less. The gloss of the protective layer 20 can be evaluated using a gloss meter or the like.

On the other hand, the strike-through occurs when the ink used when forming the protective layer 20 penetrates from the surface 10 a side to the back surface 10 b side of the paper substrate 10 as described above. Here, when the ink penetrates to the back surface 10 b side of the paper base 10, the paper base 10 becomes transparent at the part where the ink penetrates. Then, in the portion it became clear, a part of the printed layer 12 provided on the rear surface 10 b side of the paper substrate 10 is visible from the surface 10a side of the paper substrate 10. When the printed matter 1 of FIG. 1 is superimposed on another printed matter, a part of the display layer etc. provided on the other printed matter overlapping the printed matter 1 of FIG. It can be seen from In such a case, when attempting to read the optical reading information displayed on the display layer 11 using an optical reading device, one of the printings printed on a part of the printing layer 12 described above as well as the optical reading information. The optical reader also reads a part. Here, in consideration of the area where the protective layer 20 is provided, a part of the printing layer 12 read by the optical reader and a part of the printing included in the other printed matter are visible around the display layer 11. For this reason, at the time of the image processing performed after the reading by the optical reading device, a part of the printing layer 12 and a part of the printing included in the other printed matter contribute to the noise.

  Note that at least a portion of the ink used to form the protective layer 20 penetrates the paper substrate 10 when applied on the paper substrate 10. For this reason, even if the ink does not completely penetrate to the back surface 10b side of the paper base 10, the portion where the ink penetrates is in a state of easily transmitting light used in the optical reading device. In this state, when the optical reading device reads a part of the print printed on a part of the printing layer 12 or another printed matter, these become a hindrance when reading the optical read information.

By the way, there is PCS (Print Contrast Signal) as an index indicating the readability of the optical read information by the optical reader. Therefore, in the present invention, the transparency evaluation values x and y, which are parameters that can be calculated using an apparatus for measuring the PCS value, are used. Here, in the present invention, it is necessary to satisfy the following formula (1) for these x and y.
{(X−y) / y} ≦ 15% (1)

In Formula (1), x is a value calculated using following formula (1-1), y is a value calculated | required by following formula (1-2).
x = (R2-R1) / R2 (1-1)
y = (R2-R3) / R2 (1-2)

  In the formula (1-1), R 1 is a protection measured in a state where the black plate is placed on the side (back side 10 b) opposite to the side (front side 10 a) where the protective layer 20 of the paper base 10 is provided. It represents the reflectivity of the surface 10 a in the area where the layer 20 is provided. In the formulas (1-1) and (1-2), R2 is a state in which the white plate is placed on the side (back surface 10b) opposite to the side (surface 10a) on which the protective layer 20 of the paper substrate 10 is provided. The reflectance of the surface 10a in the area | region in which the protective layer 20 was not provided was measured by 1. In Formula (1-2), R3 is measured in a state in which the black plate is placed on the side (back surface 10b) opposite to the side (surface 10a) on which the protective layer 20 of the paper substrate 10 is provided. It represents the reflectance of the surface 10 a in the region where the layer 20 is not provided.

  In the portion where the protective layer 20 is in contact with the paper base 10, the transmittance of the paper base 10 is increased by the effect of the protective layer 20, so that the black plate placed on the opposite side of the surface 10a The degree of shedding is relatively high. On the other hand, in portions where the protective layer 20 is not in contact with the paper substrate 10, the black plate placed on the opposite side of the surface 10a has a relatively low degree of transparency because the protective layer 20 is not affected. Therefore, the relationship of x> y is established.

  In the present invention, the rate of change (rate of increase) from y to x by providing the protective layer 20, that is, “(x−y) / y” in the formula (1) is 15% or less. I need it. When the rate of change from y to x exceeds 15%, the ink used in the formation of the protective layer 20 penetrates the paper substrate 10 to such an extent that the reading of the optical reading information by the optical reading device is hindered. Means to In the present invention, the rate of change from y to x by providing the protective layer 20 is preferably 10% or less.

  In the present invention, as the ink used when providing the protective layer 20, there is an ultraviolet curable ink or the like.

  Moreover, when using an ultraviolet curable ink when providing the protective layer 20, in consideration of the glossiness mentioned above, a matte type ink can be used.

  The printing layer 12 constituting the printed matter 1 of FIG. 1 is a layer on which characters such as numerals, kanji, kana, symbols or figures, or a combination thereof are printed. For example, the description of the printed matter 1 of FIG. Is the layer being printed.

  In the present invention, the printing layer 12 provided on the back surface of the printed matter 1 of FIG. 1 is not necessarily provided.

  Hereinafter, the present invention will be described by way of examples, but the present invention is not limited to these examples.

Example 1
Water-based inkjet black ink is used to print numbers that are optically read information on a partial area of the surface of a paper substrate (60 kg of fine paper, six-grade paper manufactured by Nippon Paper Industries Co., Ltd.) having a size of 210 mm × 297 mm. To form a display layer. Next, an ultraviolet curing ink, UV matte OP varnish 3H (manufactured by T & K TOKA Co., Ltd.), which is an ultraviolet curing ink, is printed by an offset method on the area where the display layer is provided and the area around it. In addition, in the case of printing, it is ultraviolet curing by printing using a color-filling machine (RI-2 type tester, manufactured by Akira Co., Ltd.) with an ink buildup of 1 cc and using a non-split roll. A film was formed. Next, the protective layer was formed by irradiating the ultraviolet curing film with ultraviolet light. In addition, when irradiating an ultraviolet light, the irradiation conditions of an ultraviolet-ray were 240 W / cm, and the conveyance speed of the paper base material was 30 m / min.

  Printed matter was obtained by the above. The obtained printed matter was evaluated by the method described below. The results are shown in Table 1.

(1) Glossiness The glossiness of the protective layer at an angle of 60 ° was measured using a gloss meter PG-1 manufactured by Nippon Denshoku Kogyo Co., Ltd. In addition, in the case of a measurement, it measured in arbitrary ten places, and evaluated the glossiness by the average of the said ten measured value.

(2) Infrared Camera Observation Using a infrared camera, observation was performed on the portion provided with the protective layer. And the result of observation was evaluated as shown below.
○: The protective layer can not be viewed with an infrared camera.
X: The protective layer can be viewed with an infrared camera.

(3) Water resistance The protective layer was rubbed back and forth 30 times with a cotton swab moistened with water, and the printed condition of the display layer after rubbing was observed. And the result of observation was evaluated as shown below.
○: The ink constituting the display layer is not eluted.
×: The ink constituting the display layer is eluted.

(4) Evaluation of Transmissivity The reflectances R1, R2, and R3 were measured under the following conditions using a microreflectance meter MR-12 manufactured by Sakata Inx Engineering Co., Ltd.
R1: The reflectance of the surface 10a in the area where the protective layer 20 is provided is measured in a state where the black plate is placed on the side opposite to the side where the protective layer 20 of the paper base 10 is provided (back surface 10b).
R2: With the white plate placed on the side opposite to the side on which the protective layer 20 of the paper substrate 10 is provided (back side 10b), the reflectance of the surface 10a in the area where the protective layer 20 is not provided is measured .
R3: With the black plate placed on the side opposite to the side on which the protective layer 20 of the paper substrate 10 is provided (back side 10b), measure the reflectance of the surface 10a in the area where the protective layer 20 is not provided .

Then, the values of the transparency evaluation values x and y satisfying the following formula were calculated. In addition, x and y obtained by this measurement serve as an index as to whether or not the black member placed on the back side of the printed matter is easily seen through. A white plate was used to measure R2 (white backing), and a black plate was used to measure R1 and R3 (black backing). Moreover, in the case of a reflectance (R1-R3) measurement, B filter (measurement wavelength range: 400 nm-1120 nm) was used. The white and black backings are those of the standard specifications provided in the MR-12. Moreover, in the case of a measurement, it measures in arbitrary ten places, and x which satisfy | fills a following formula (1-1) and y which satisfy | fills a following formula (1-2) by the average of the ten measured values concerned respectively I asked.
x = (R2-R1) / R2 (1-1)
y = (R2-R3) / R2 (1-2)

Example 2
In Example 1, UV flexo matte varnish Z (manufactured by T & K TOKA Co., Ltd.) was used as the UV curable ink in place of UV matte OP varnish 3 H, and an UV curable film was formed by flexo method, except for the following. Printed matter was obtained by the same method as in 1. The obtained printed matter was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 1
Printed matter was produced in the same manner as in Example 1 except that UV L-Gloss OP varnish M (manufactured by T & K TOKA Co., Ltd.) was used in place of UV matte OP varnish 3 H as the ultraviolet curing ink in Example 1. I got The obtained printed matter was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 2
In Example 1, except that UV Rex FP gloss varnish (manufactured by Dainichi Seika Kogyo Co., Ltd.) was used instead of UV matte OP varnish 3H as the UV curable ink, and a UV curable film was formed by a flexo method. In the same manner as in Example 1, a printed material was obtained. The obtained printed matter was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 3
Printed matter was obtained in the same manner as in Example 1 except that the formation of the protective layer was omitted in Example 1. The obtained printed matter was evaluated in the same manner as in Example 1. The measurement area of the measurement (glossiness, infrared camera observation, water resistance, transparency evaluation value) performed in the evaluation was made to coincide with that in Example 1. The results are shown in Table 1.

  From Example and Comparative Example 3, it was found that since the ink (water-based ink) contained in the display layer is weak in water resistance, a protective layer for protecting the display layer is necessary. Further, it was found from the Examples and Comparative Examples 1 and 2 that the protective layer had a gloss of 7 or less, which does not interfere with optical reading using an infrared ray or the like. Furthermore, according to Example and Comparative Examples 1 and 2, when the rate of change from y to x ((x−y) / y) due to the provision of the protective layer is 15% or less, it is possible to form the protective layer. It has been found that the penetration of the used ink into the paper substrate is not so severe as to cause a strikethrough or near strikethrough condition.

1 printed matter 10 paper substrate 11 display layer 12 printing layer 20 protective layer

Claims (5)

A paper base,
A display layer provided in a partial area of one side of the paper substrate and displaying optical read information;
A protective layer covering at least the display layer;
A portion of the protective layer contacts the paper substrate;
The gloss of the protective layer is 7 or less,
Printed matter characterized by satisfying the following formula (1).
{(X−y) / y} ≦ 15% (1)
(In the formula (1), x represents a transparency evaluation value in a portion of the surface of the paper substrate in contact with the protective layer, represented by the following formula (1-1). Y represents the following The transparency evaluation value in the part which is shown in Formula (1-2) and is not contacting the protective layer among the surfaces of a paper base material is represented.
x = (R2-R1) / R2 (1-1)
y = (R2-R3) / R2 (1-2)
In the above formulas (1-1) and (1-2), R1, R2 and R3 are as follows.
R1: The reflectance of the surface of the paper substrate in the area where the protective layer is provided, as measured with the black plate placed on the back side opposite to the surface side where the protective layer is provided on the paper substrate.
R2: reflection of the surface of the paper substrate in a region where the protective layer is not provided, as measured with the white plate placed on the back side opposite to the surface side where the protective layer of the paper substrate is provided rate.
R3: reflection of the surface of the paper substrate in the area where the protective layer is not provided, as measured with the black plate placed on the back side opposite to the surface side where the protective layer of the paper substrate is provided rate. )   The printed matter according to claim 1, wherein the optical reading information is character information or an identification code read by optical character recognition.   The printed matter according to claim 1, wherein the display layer is formed of a water-based ink.   The printed matter according to any one of claims 1 to 3, wherein the protective layer is formed of an ultraviolet curing ink.   The printed material according to any one of claims 1 to 4, wherein a print layer is provided on at least a part of the surface of the paper base opposite to the surface on which the display layer is provided.

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