JPH0223383A - Secrecy leak prevention system using copying machine and copying paper - Google Patents

Abstract

PURPOSE:To disable reproduction by recopying or photography by coating or impregnating one side of the copying paper with an ultraviolet-ray light emitting material, forming an image of an object on the surface with white toner by using the copying machine, and reproducing a copy image as a light nonemission body while ultraviolet rays are projected. CONSTITUTION:One side of the copying paper is coated or impregnated with the ultraviolet-ray light emitting material and the image of the object is formed on the surface coated or impregnated with the ultraviolet-ray light emitting material by using a copying machine. Then characters, etc., on the paper surface are nearly invisible; and fully white paper is obtained by copying and a white picture is taken by photography. When the characters etc., are reproduced, the entire paper surface where the ultraviolet-ray light emitting material is present emits light by ultraviolet-ray irradiation and no ultraviolet ray is transmitted through white toner, so the ultraviolet- ray light emitting material in the lower layer emits no light to generate light-and-shade contrast there, thus reproducing a document (character, etc.). Consequently, the document can not be recopied by a copying machine, photographed, and read visually and the secrecy leak prevention is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a secret leakage prevention system using a copying machine and copying paper.

[Conventional technology]

Recent technological innovations include not only various inventions and know-how, but also so-called software for commercial sales and sales, and companies are investing large amounts of capital to develop various software. has formed a significant asset value, and therefore various measures are being taken to prevent such software from being leaked to anyone other than those involved.

Furthermore, privacy matters for companies, such as personnel matters, must be protected as trade secrets.

By the way, recent magnetic tapes (disks) are used to record objects.
Except for the recording and reproduction of information, it is generally done by writing, and the means used are writing, printing, and copying.

It is unnecessary to explain further that when records are recorded by such means, the characters are mostly written on gi or paper-like materials, and these are stored.

Even the trade secrets mentioned above are usually recorded and kept on paper.

Therefore, prevention of leakage of the various trade secrets (software) that have the above-mentioned property value has become a problem.

When stealing document records, there are cases where the document itself is stolen, and cases where the document is memorized by looking at it, photographed, or copied. Theft is easily revealed, and can be prevented by storing it in a safe, etc., so there is little problem of secret leakage. There is no major problem in this respect either.

The problem lies between the document leaving storage, being used, and returning to storage. However, there is also a problem if there is a mistake in document storage and the document is easily obtained.

The person who steals this secret, whether it is someone outside the company or someone inside the company, takes a photo with a camera or copies it with a stationary or recently popular handheld copy machine. Most of the time,

Therefore, in order to prevent the leakage of trade secrets recorded on paper-like materials, it is conceivable to prevent the above-mentioned camera exposure and copying.

The following methods are known as techniques for preventing secret leakage through such copying.

In this method, aluminum is vapor-deposited on a paper-like material, and dark brown transparent ink is printed on it to form copy paper. Documents are printed on this paper with black ink, and the document can be read as is. When the document is copied, the copy paper is coated with black toner, making it impossible to copy the document in a recognizable manner.

[Problem to be solved by the invention]

When using the above-described method of printing documents using aluminum vapor deposition, brown transparent ink, and black ink, there were the following problems.

(1) Since it can be visually read under normal brightness, it can be memorized or photographed.

(2) The cost is high because aluminum vapor deposition is performed.

(3) Documents are printed, so they are not suitable for easily prepared originals or documents that only require a large number of copies.

(4) Because it is a specially processed paper coated with aluminum vapor deposition, there is no electrostatic charge, so it can only be used for printing purposes and cannot be used as copy paper.

Therefore, in view of these problems in the prior art, first of all, in order to prevent text from being visually readable under normal brightness, and therefore from photographing and copying, I came up with the idea of using a substance that is invisible under ordinary bright natural light and visible light, but emits light under special ultraviolet light. In other words, they attempted to reproduce documents using only ultraviolet irradiation.

Therefore, based on this idea, we tried printing the target document on paper by using this ultraviolet light emitting substance alone or by mixing it with printing ink, but we found that the ultraviolet light emitting substance formed fine letters and the letters were distinguishable. I couldn't get it to emit light like that. In addition, there remains the problem that printing does not add to the need for copying easily prepared manuscripts or documents that can be copied.

For this reason, an attempt was made to mix an ultraviolet light-emitting substance into the white toner used in copying machines, which has recently begun to be sold, and to make copies on paper.

However, since white toner basically consists of a resin that can be heat-fused, such as an epoxy resin, it has been found through experiments that it is completely impossible to use this together with an ultraviolet light emitting substance.

At the same time, during this experimental process, it was confirmed that the white toner does not transmit ultraviolet rays. The reason for this is probably that the pigment or the metal fine particles used for charging during copying have a light-shielding effect.

Based on this experience, the inventor of the present invention solved the above-mentioned problems of the prior art by reversing the idea of using ultraviolet light-emitting substances while keeping the basic idea of using the ultraviolet light-emitting substance.

The present invention provides a secret leakage prevention system and copying system using a copying machine which, although it is a copied document, cannot be recopied, cannot be photographed, and can only be reproduced under ultraviolet irradiation. The purpose is to provide paper.

[Means to solve the problem]

A secret leakage prevention system using a copying machine according to the present invention consists of the following constituent elements (A) to (C) in order to solve the problems of the above-mentioned conventional technology.

(A) coating or impregnating at least one side of the copy paper with an ultraviolet luminescent substance; (B) applying a white toner to the surface coated with or impregnated with the ultraviolet luminescent substance using a copying machine; forming an image of the object; (C) reproducing the reproduced image as a non-luminescent object under ultraviolet irradiation;

The copying paper mentioned in claim [1] may be made of any known material such as plate transparent paper or synthetic film, as long as it can be used in copying machines using general toner.

Further, the ultraviolet luminescent substance is, for example, a material that emits light when irradiated with ultraviolet light with a wavelength of 352 nm and is generally used in various fields, or a material mixed with an appropriate fixing resin or solvent. be.

As for the white toner, it is sufficient to use products that are currently being demonstrated or sold by two major companies in the copying industry.

As for ultraviolet irradiation, for example, a fluorescent lamp of Flufflight Blue (trade name) may be used.

The secret leakage prevention system using a copying machine according to claim (2) has the above-mentioned configuration requirements (
In addition to A) to (C), the following configuration requirement (D) is further provided.

(D) After the above component (B), the copy paper is passed through the copy machine again to shade the white toner image.

This shading, also called a screen, refers to printing a large number of dots, plus signs, X symbols, and other patterns and symbols within a predetermined area.

It goes without saying that toner for this copying may be of a type other than the original toner.

The secret leakage prevention system using a copying machine according to claim (2) has the above-mentioned configuration requirements (
In addition to A) to (D), the following configuration requirement (E) is further provided.

(E) A desired color pattern other than the song is printed on the opposite side of the copy sheet from the copy image, either beforehand or after copying, or by using a copy machine.

The color pattern referred to herein may be any of various colors including black, and any suitable pattern may be used, such as a moiré pattern or camouflage pattern, including shading.

In order to solve the problems of the above-mentioned prior art, the copying paper according to claim (2) of the present invention includes at least one paper-like material that can be passed through a copying machine.
It is coated or impregnated with an ultraviolet light emitting substance.

The paper material referred to herein may be natural paper, or any material known per se that can withstand the working temperature of a copying machine and can be coated with or impregnated with an ultraviolet light emitting substance.

In addition, ultraviolet light-emitting substances are inorganic phosphors, etc. that emit ultraviolet light,
For example, it includes a substance that emits light when irradiated with ultraviolet light having a wavelength of 352 nm, and a mixture thereof with a fixing resin, a solvent, and the like.

In order to solve the problem of the prior art described above, the copy paper of claim (2) has, in addition to the constituent features of claim (2), a desired pattern printed on the non-copy side of the paper-like material.

The desired pattern here may be any color including black, and may be any appropriate pattern, such as a moiré pattern or camouflage pattern, including hatching.

[For production]

According to the secret leakage prevention system using a copying machine according to claim [1], characters on the paper are hardly visible due to copying using white toner, and when this is copied, the copy paper comes out completely blank.

Since it is a white toner, even if you take a photo, it will appear blank.

During reproduction, the entire surface of the paper containing the ultraviolet light-emitting substance emits light when irradiated with ultraviolet light, and the image area (letters, etc.) of the white toner does not transmit ultraviolet light, so there is no light emission from the ultraviolet light-emitting substance in the lower layer, and there is a difference between brightness and darkness. Contrast is created and documents (characters, etc.) can be reproduced.

According to the secret leakage prevention system using a copying machine set forth in claim (2), although the secret leakage prevention system using a copying machine set forth in claim [1] has the above-mentioned basic unique effects, The above white toner image area is slightly raised, so there is still a slight problem that depending on the viewing angle, you may be able to read letters, etc. However, due to the shading of this system, dots, etc. will appear from above on the white toner image area. As a result, the brightness and darkness of the dots are visually noticeable, and characters and the like in the raised areas of the white toner image cannot be distinguished at all.

According to the system for preventing secret leakage using a copying machine according to claim (2), in the system for preventing secret leakage using a copying machine according to claim (2), finished copy paper is exposed to a strong light source from the back side. There is still a slight problem that a white toner image is visible when looking at it, but in this system, by applying a pattern to the back side of the copy paper (the side opposite to the toner image), this copy paper becomes a strong light source. Even when looking through it, this pattern creates a strong contrast, and the contrast of the white toner image does not appear to the eye at all (because the pattern overlaps with the copied image), only the pattern can be seen. ).

According to the copying paper of claim (2) of the present invention, it can be used in the secret leakage prevention system using the above-mentioned copying machine.
It can be used as copy paper.

According to the copy paper of claim (2), since the pattern is printed on the back side of the copy paper in advance, the application or impregnation of the ultraviolet light emitting substance can be done on one side of the copy paper, which is easy.
When using it, it is easy to understand which side should be used for copying.

〔Example〕

Hereinafter, embodiments of the secret leakage prevention system using the copying machine of the present invention and copy paper will be described in detail.

(First Example) The copy paper used was paper (high-quality paper) that is generally used for copying.

The ultraviolet light-emitting substance was prepared using 48% inorganic phosphor, 44% skillenated alkyd resin, 6% high-boiling aliphatic solvent, and 2% geothermal additive thereof.

This ultraviolet light-emitting substance was very thinly coated on one side of the copy paper using a roller.

A black light blue fluorescent lamp (trade name) was used as an ultraviolet irradiation means for reproduction. This fluorescent lamp is configured so that it can irradiate light with a wavelength of 300 to 400 nm.

A Mita 2055 copying machine was used for copying with white toner.

When the -a printed matter was copied using the above-mentioned equipment, it was not possible to copy it again and it was also impossible to take a photograph.

The letters and other characters could be perfectly reproduced under the ultraviolet rays of a black light blue fluorescent lamp.

(Second example) The copy paper used was commonly used high-quality paper.

The ultraviolet light-emitting substance was prepared with 45% inorganic phosphor, 47% skillenated alkyd resin, 7% high-boiling aliphatic solvent, and 1% other additives.

This ultraviolet light-emitting substance was very thinly coated on one side of the copy paper using a roller.

As the ultraviolet irradiation means for reproduction, a Black Light Blue fluorescent lamp (trade name) was used as in the first embodiment.

A Mita 2055 copying machine was used for copying with white toner.

As the shading, MAXON screen 20% 701in
es/1nch was used.

When I copied a general printed matter using the above device, I was unable to copy it again and also was unable to take a photograph. In addition, no matter how the surface of the copy paper was tilted, it was not possible to distinguish the copied images at all.

The letters and other characters could be perfectly reproduced under the ultraviolet rays of a black light blue fluorescent lamp.

(Third Example) The copying paper used was one that had approximately the same award as the paper generally used for copying.

The ultraviolet light-emitting substance was prepared with 46% inorganic phosphor, 46% skillenated alkyd resin, 6% high-boiling aliphatic solvent, and 2% other additives.

This ultraviolet light-emitting substance was coated very thinly on one side of the copy paper using a roller.

A black pattern was printed on the other entire surface of the copy paper.

This pattern is generally called moire.

As the ultraviolet irradiation means for reproduction, a Black Light Blue fluorescent lamp (trade name) was used as in the first example.

The copying machine that makes copies using white toner is Mi ta 205.
Five machines were used.

When I copied a general printed matter using the above device, I was unable to copy it again and also was unable to take a photograph. In addition, no matter how the surface of the copy paper was tilted, it was impossible to distinguish the copied image at all. Furthermore, even when viewed from the back with a strong light source, the copied image was not visible at all (the copied image and moire do not overlap; only the moire is visible).

Furthermore, under the ultraviolet irradiation of a black/light blue fluorescent lamp, the letters and other characters could be perfectly reproduced.

Copy paper obtained in this example, whose image can be reproduced by ultraviolet irradiation, is attached and submitted as reference material.

〔Effect of the invention〕

Documents that have been copied and created using the system of the present invention as set forth in claim [1] will no longer be able to be recopied using a copying machine, photographed, or read with the naked eye, thereby preventing the leakage of trade secrets and other secrets. It has now become possible to demonstrate its effectiveness.

By the system of the present invention described in claim (2), while exhibiting the effect according to claim [1] above, by shading,
In particular, even if the angle of the eye with respect to the paper surface is changed, the strong contrast of the shading makes it impossible to distinguish the copied image at all, making it possible to exhibit an even more reliable effect of preventing leakage of secrets.

The system of the present invention as set forth in claim (2) provides the effects of claims (2) and (2) above, and by applying a pattern to the back side of the copy paper, even when the copy paper is exposed to light using a strong light source. The copied image cannot be made to stand out, and it is possible to achieve an even more reliable effect of preventing leakage of secrets.

According to the copying paper of the present invention as described in claim (2), the effects obtained according to the above claims (2) and (2) can be obtained by simply coating or impregnating a general paper-like material suitable for copying with an ultraviolet light emitting substance. It has the advantage of being easy to manufacture and costs less than conventional aluminum vapor deposition.

At the same time, it has the advantage that it can be used as is as a general copy paper.

According to the copying paper of the present invention as set forth in claim (2), the paper that exhibits the effects obtained according to the above-mentioned claims (2) and (2) is coated or impregnated with an ultraviolet light-emitting substance on a general paper-like material that can withstand copying, and then It can be manufactured by simply printing a pattern on the surface, and has the advantage of being lower in cost than conventional aluminum vapor deposition.

at the same time, One side remains the same even as general copy paper. There are advantages that can be used.

Claims (1)

[Scope of Claims] [1] A secret leakage prevention system using a copying machine consisting of the following constituent elements (A) to (C). (A) coating or impregnating at least one side of the copy paper with an ultraviolet luminescent substance; (B) applying a white toner to the surface coated with or impregnated with the ultraviolet luminescent substance using a copying machine; forming an image of the object; (C) reproducing the reproduced image as a non-luminescent object under ultraviolet irradiation; [2] A secret leakage prevention system using a copying machine according to claim [1], characterized by comprising the following constituent feature (D). (D) After the above component (B), the copy paper is passed through the copy machine again to shade the white toner image. [3] A secret leakage prevention system using a copying machine according to claim [2], characterized by comprising the following constituent feature (E). (E) A desired color pattern other than white is printed on the opposite side of the copy sheet from the copy image, either in advance or after copying, or by using a copy machine. [4] Copying paper that can be passed through a copying machine and has at least one side coated with or impregnated with an ultraviolet light emitting substance. [5] The copy paper according to claim 4, wherein a desired pattern is printed on a non-copying side surface of the paper.