JP2002011985A - Concealed printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concealed printed matter which securely keeps a transfer concealing layer and prevents a see-through phenomenon from occurring with such other advantages that the mechanical suitability in a printer and the like is high and the printed matter can be discarded as a common refuse after its use. SOLUTION: This concealed printed matter 1 is of such a structure that concealed information 3 such as number or symbol formed on a mount 2 is covered by the releasable transfer concealing layer 4 in such a way that the information 3 is invisible. The mount 2 has an upper layer 5 for retaining the transfer concealing layer 4 and is made up of paper having a three-tier structure that a center layer 6 filled internally with a pigment with high opacity is sandwiched between the upper layer 5 and a lower layer 7. Compared to an ordinary single layer paper or film, the concealed information 3 on the mount 2 is not seen through even under a high-intensity light and thus the thickness of the transfer concealing layer 4 can be reduced and its control can be simplified. Since a thin transfer foil is used for the concealing layer 4, the release of the concealing layer 4 by a roller or the like during the mechanical issuance of the printed matter prior to its use does not occur. Further, the concealed printed matter 1 can be discarded as a common refuse because it has no metallic layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concealed printed matter used for a lottery ticket, an international telephone card, an Internet connection card, a small online payment card, and the like.

[0002]

2. Description of the Related Art In lotteries and international telephone cards as described above, a concealing layer is formed so as to cover numbers and symbols printed on a backing paper, and the concealing layer is peeled off by scratching. Widely used. As a method of forming the concealing layer, printing is generally performed using silk ink so as to cover from above, but recently,
In order to provide mass production effects and cost advantages, those in which a hiding layer is formed by transfer are also used.

[0003]

However, when the concealing layer is formed of the transfer foil, a highly smooth backing sheet is required to securely adhere to the backing sheet on which the numbers and symbols are printed. Further, the transfer foil is more transparent than silk ink because of the thinness of the transfer foil. Therefore,
A concealed printed material using a mount having an opaque layer interposed therebetween is used. However, since the opaque layer is formed by using a metal foil or by metal deposition, there are limitations on the types of printers that can be used. In addition, there is a danger that static electricity accumulated in the metal layer will spark during printing. In addition, there is an environmental problem that it is difficult to handle as garbage.

The present invention has been made in view of the above problems, and an object of the present invention is to securely hold a transfer concealment layer and to prevent see-through, and to provide a machine such as a printer. An object of the present invention is to provide a concealed printed matter which has good suitability and can be discarded as general waste after use.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method in which concealment information such as numbers and symbols formed on a backing sheet is covered with a peelable transfer concealment layer so as to be invisible. Concealed printed matter, wherein the backing paper has an upper layer holding a transfer concealing layer, and is formed of a three-layered paper in which a central layer filled with a highly opaque pigment is sandwiched between the upper layer and the lower layer. It is characterized by becoming.

[0006]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view for explaining a concealed printed matter according to the present invention. As shown in the figure, the concealed printed matter 1 is printed or printed with concealment information 3 such as numbers and symbols on a three-layered mount 2 and is transferred and concealed by a transfer foil so as to cover the concealment information 3. This is a configuration in which a layer 4 is formed.
The mount 2 has a structure in which three layers of an upper layer 5, a center layer 6, and a lower layer 7 are laminated. The total thickness of the paper is desirably 250 μm or less from the viewpoint of printer suitability.

The upper layer 5 of the backing sheet 2 needs to have a high smoothness in order to transfer the transfer foil, and usually has a smooth surface of 150 seconds or more on which the transfer foil is well fixed. Specifically, a surface having a smoothness of 150 seconds or more is obtained by using calendered high-quality paper or coated paper or by performing a mat coating process.

The central layer 6 of the mount 2 is a layer having high opacity, and specifically, a non-metallic material containing a high opacity pigment such as paper into which black pigment is formed, black cardboard, or the like. Use The pigment is not limited to black, but the central layer 6 preferably has a transmission density of 1.7 or more as measured by a transmission densitometer.

The lower layer 7 of the mount 2 can be made of any material such as high-quality paper. When applying a pattern to the back surface by color printing, white paper may be used.

The three layers may be laminated by using an adhesive, or the upper layer 5 and the lower layer 7 may be laminated and sandwiched with the central layer 6 having high opacity.

The concealment information 3 formed on the backing paper 2 may be printed by inkjet printing or offset printing.

By using a colored pigment having a spectral characteristic similar to the printing color of the concealment information 3 to color the center layer 6, the printing of the concealment information 3 can be made red, blue, etc. other than black. Can be. In addition, it is also possible to obtain a security effect of the mount at the manufacturing stage by adding a fluorescent agent or making a watermark in the center layer 6. Furthermore, since there is no influence of see-through, there is an advantage in design.

[0014]

EXAMPLE Black paper containing a black pigment (basis weight: 64 g /
m ² ) was sandwiched between high-quality papers equivalent to a basis weight of 64 g / m ² so as to be sandwiched from both sides, and matte-coated on one side to prepare a backing sheet. The total thickness of the resulting mount is 200μ
m, the smoothness of the matte coating surface was 250 seconds, and the light transmission density was 5.20.

After characters were printed on the backing paper produced by the ink jet printer (Cytex 6450), foil transfer was performed on the surface with a continuous foil tape transfer machine so as to cover the characters. It was confirmed that the printer was not caught by the printer during printing, and that the transfer foil was well fixed and cut in the transfer step. In addition,
The transfer foil used was a silver scratch foil made by Kurtz Co., and the transfer temperature was 70 ° C.

In the concealed printed matter obtained in this manner, the lower characters could not be seen through the transfer foil.

[0017]

As described above, the concealed printed matter of the present invention is a concealed printed matter in which concealing information such as numbers and symbols formed on a backing sheet is covered with a peelable transfer concealing layer so as to be invisible. Wherein the mount has an upper layer holding a transfer hiding layer, and is made of a three-layer paper in which a central layer filled with a highly opaque pigment is sandwiched between the upper layer and the lower layer. Because of this feature, the concealment information on the mount does not show through even when light of high intensity is applied, and the thickness and management of the concealment layer can be simplified as compared with ordinary single-layer paper or film.

Further, since a transfer foil can be used for the hiding layer,
The protrusion of the scratch part from the backing is about 1 μm,
There is no such thing as peeling off before use with a roller at the time of machine issuance.

Further, since there is no metal layer as in the prior art, it is possible to discard it as general garbage at the end of use.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view for explaining a concealed printed matter according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concealed printed matter 2 Backing paper 3 Concealment information 4 Transfer concealment layer 5 Upper layer 6 Center layer 7 Lower layer

Claims (3)

[Claims] 1. A concealed printed matter in which concealment information such as numbers and symbols formed on a backing sheet is covered with a peelable transfer concealing layer so as to be invisible, wherein the backing sheet holds the transfer concealing layer. A concealed printed matter comprising a three-layered paper having an upper layer and a central layer filled with a pigment having high opacity sandwiched between the upper layer and the lower layer. 2. The concealed printed matter according to claim 1, wherein the surface of the upper layer has a smoothness of 150 seconds or more. 3. The central layer has a transmission density of 1.7 or more as measured by a transmission densitometer.
The concealed printed matter described in 1.