JPH036442Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pressure-sensitive copy type slip in which the copied information cannot be distinguished under light sources such as incandescent light bulbs, fluorescent lights, and the sun (hereinafter referred to as normal light sources).

Pressure-sensitive recording media, which have a carbon copy layer formed on part of carbon paper or slips, can easily copy recorded information, so various formats have been developed and used in various fields. . However, these carbon papers and pressure-sensitive recording materials have the disadvantage that the copy information copied onto the copy paper is easily tampered with, and various counterfeiting and tampering prevention measures are being considered.

Pressure-sensitive copy slips as pressure-sensitive recording media are also used in various fields. One example of this is its use as a request slip for making a cash card for withdrawing bank deposits.Specifically, it is used as follows.

The customer first fills out necessary information such as address, name, telephone number, and password on a pressure-sensitive copy slip, which is a request form. The bank performs various procedures based on this slip and issues the card. At this time, some of the slips filled with necessary information are kept even after the card is issued. This is because if a customer inquires about the personal identification number after the card is issued, it is necessary to confirm the customer's identity by checking the stamp or signature on the slip. Therefore, the storage of slips is extremely strict. If confidential information is leaked to a third party while the slip is being stored, it is expected that the cash card will be forged based on this information and misused.

Therefore, in pressure-sensitive copying slips that are used in this way, it is strongly recommended that the copying information be made difficult to forge or tamper with, and that the copying information be constructed so that it cannot be read as is. It is rare.

Under these circumstances, the inventor of the present invention has developed a copy slip in which the copied characters formed on a part of the copy paper by applying pressure with a writing instrument are made indistinguishable under incandescent light bulbs or fluorescent lights. That is, on the upper paper with a pressure-sensitive copying carbon ink layer provided on the back side of the base, and on the part of the other base opposite to the pressure-sensitive copying carbon ink layer, two lights with different spectral distributions from the carbon ink are emitted equally. An application was previously filed for a copying slip comprising at least one set of bottom paper and a bottom sheet provided with a decorative pattern using a coloring material that exhibits a so-called metamel property, which is a phenomenon that causes a color sensation.

However, in a copy slip with such a structure, hue and density control is extremely strict to ensure that the carbon ink and the coloring material that makes up the decorative pattern exhibit metamel properties, resulting in slight imbalances. However, there was a risk that they would not be able to achieve their intended objectives.

This invention was created in view of the above circumstances, and when pressurized with type or writing instruments,
The pressurized part can be transferred onto the surface of another adjacent base material, and the copied information such as transferred letters and numbers cannot be discerned under normal light sources, and it also has the effect of preventing counterfeiting and tampering. The purpose of this document is to provide a copy slip with a pressure-sensitive copy section, and the top sheet has a pressure-sensitive copy section and a pressure-sensitive copy slip with a decorative printing layer on the top. at least one lower sheet provided so as to face and be adjacent to the pressure-sensitive copying section, and each of the pressure-sensitive copying sections has one of a color forming agent and a color developer added thereto. In addition, the hue of the decorative printing layer and the hue of the area where the color forming agent and the color developer react to form a color appear to be the same under normal light sources such as natural light bulbs, fluorescent lights, and the sun. but,
The pressure-sensitive copying slip is characterized in that it appears differently when observed using a light source or filter having spectral characteristics other than those of the normal light source.

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

FIG. 1 is an explanatory cross-sectional view of a pressure-sensitive copy slip 1 of the present invention, in which 2 is an upper sheet provided with a pressure-sensitive copy section 3, and 5 is a pressure-sensitive copy having a decorative printing layer 6 applied thereto. The lower sheet is provided with a portion 7, and each sheet is joined by a connecting portion 9.

Here, the pressure-sensitive copying section 3 and the pressure-sensitive copying section 7 are made of image-forming materials such as printing ink and paint, and are printed on paper, synthetic resin sheets, etc. by an intaglio printing method, a screen printing method, an inkjet printing method, etc. The image forming material must have the following properties. That is, one image-forming material contains at least a color former together with a vehicle, and the other image-forming material contains a vehicle and a color developer. If necessary, various auxiliary agents such as colorants, drying accelerators, drying inhibitors, and color tone adjusting agents may be added to the main ingredient in these image forming materials.

Here, the color former is a substance that donates electrons or accepts protons such as acids to develop color. Examples include dimethylmethane-based organic coloring agents, xanthene-based organic coloring agents, and spiro-based organic coloring agents as electron-donating organic coloring agents.
These may be used alone or in combination.

Also, a color developer is one that accepts electrons or
Alternatively, it is a substance that has the property of donating protons and develops color by reacting with the color former.
Examples include phenolic color developers, aromatic carboxylic acid color developers, and aromatic carboxylic acid metal salt color developers as electron-accepting color developers that develop color by reacting with the electron-donating organic color former. These agents can be used alone or in combination.

As mentioned above, these color forming agents and color developing agents must be contained in each of the image forming materials, but at least one of them must be encapsulated in microcapsules or used in a pressure-sensitive copying section. It is necessary to provide a protective layer on at least one of the two.

By doing this, the color former and color developer will come into contact only when the microcapsules or protective layer are destroyed by pressure, and electrons or protons will be exchanged between the color former and the color developer. , the desired color development occurs in the pressure-sensitive copying section 7.

On the other hand, a decorative printing layer 6 such as a colored pattern or background pattern is applied on the pressure-sensitive copying section 7. This decorative printing layer 6
may be formed using printing ink, writing ink, paint, or the like. The hue of the decorative printing layer 6 is adjusted to match the hue of the color developed by the reaction between the color forming agent and the color developer in each pressure-sensitive copying section 3 and 7, so that it exhibits metamel property under normal light. I'll keep it. In this way, the copy information (the part where the coloring agent and the color developer react and develop color) in the pressure-sensitive copying section 7 of the pressure-sensitive copying slip 1 will be transferred to the decorative printing layer 6 under a normal light source. Although the content cannot be confirmed due to interference, if the pressure-sensitive copying section 7 is observed through a filter with special spectral characteristics or while irradiated with light having a special spectral energy distribution, the copy information can be seen. The content will be verified immediately. The spectral reflectance curve of the part where the color forming agent and the color developing agent react and are colored, and the decorative printing layer 6
Preferred specific examples of the spectral reflectance curve and the spectral characteristic curve of the special filter are shown in FIGS. 2 to 4.

As explained above, in the pressure-sensitive copy slip of the present invention, the color development in the pressure-sensitive part is determined by the chemical reaction between the color former and the color developer, so the color development is always constant, at least within the same lot. Obtained in the pressure section. Therefore, the coloring material forming the decorative printing layer is
Since color matching can be performed based on the constant color development in the pressure-sensitive area, the hue and density management of coloring materials becomes extremely easy and reliable, which in turn makes it possible to obtain high-quality pressure-sensitive copying slips. For pressure-sensitive copying slips using conventional carbon ink, it was necessary to control the hue and density of both the carbon ink and the ink for forming decorative patterns, which was extremely difficult.) In addition, in the present invention, as a matter of course, by simply irradiating light with a desired spectral energy dispersion or observing through a filter having a desired spectral transmittance, it is possible to copy images that would normally be hidden under a light source. It also has the effect of allowing information to be confirmed.

[Brief explanation of the drawing]

Figure 1 is an explanatory cross-sectional view of a pressure-sensitive copy slip, Figure 2 is a spectral reflectance curve of color development due to the reaction between a color former and a color developer, Figure 3 is a spectral reflectance curve of a decorative printing layer, Figure 4 shows the spectral characteristic curves of the filters. 1...Pressure-sensitive copy slip, 2...Top sheet, 3,
7...Pressure-sensitive copying section, 5...Lower sheet, 6...Printing layer for decoration.

Claims (1)

[Claims for Utility Model Registration] (1) An upper sheet provided with a pressure-sensitive copying section and a pressure-sensitive copying section on which a decorative printing layer is applied can be adjacent to and facing the pressure-sensitive copying section. each pressure-sensitive copying section has one of a color former and a color developer added thereto, and a hue of the decorative printing layer. The hue of the part where the color forming agent and the color developing agent react and develop color appears the same under a normal light source such as an incandescent lamp, fluorescent lamp, or the sun, but
A pressure-sensitive copy slip characterized in that it appears differently when observed using a light source or filter having spectral characteristics other than those of the normal light source. (2) The pressure-sensitive copying slip according to claim 1, wherein at least one of the color former and the color developer is encapsulated in microcapsules.