JPH04500250A - Safety paper for creating certificates - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Safety paper for creating certificates There have been attempts to forge paper certificates for some time, and Efforts have already been made for a considerable time to obtain suitable means for detecting counterfeiting. " The meaning of 'certificate' is then to be understood quite normally and includes all kinds of obtaining financial or other benefits to the printed materials (Druckwerken) and their respective owners; Including documents that can be used in a narrow sense, such as certificates, banknotes, securities, checks, etc. However, it is also possible to deal with personal items such as admission tickets, train tickets, etc. Legitimation-und Identiftka tionspapiere) or even another type of certificate. It can be a topic.

Detecting counterfeit certificates is usually done by checking that the original has certain markings (Kennzeich en), the mark cannot be forged, but , can be counterfeited at great cost or only poorly counterfeited. An original is distinguished from a forgery because it cannot be tampered with. This sign indicates that anyone Special papers that are not readily available, such as fluorescent fillers (Ein lagen), Planchette, refreshing pattern, metal system or other freely available papers (eiBear beitet) The use of special paper is counted. But also the optical shape of the certificate (O p, tische Gestaltung) can serve as a marker, then e.g. For example, markings, ripples, complex color layers, or precisely composed The motif is printed on paper or another printing technique is used that makes counterfeiting difficult. It will be done. All such signs have been thoroughly proven in many fields, especially When a sign is provided in common, for example, a paper watermark containing fluorescent and fluorescent fillings and at the same time to oppose counterfeiting (nacha r+wungswidrig) fully demonstrated when printed.

This type of marking on certificates has the disadvantage that the features incorporated in the paper are usually immediately For example, it cannot be detected by simply observing under ultraviolet light (fluorescent fillings). or planset) or by special testing methods (metallic) or at least Inspection using transmitted light (watermark pattern) is also required to achieve the objective. but Also, the optical shape of a document is not always suitable for immediate identification of forgery. in rare cases Since the original and the counterfeit exist side by side, it is difficult to recognize the difference in optical shape. Due to the increasing complexity of front printing, only experts with great experience can It is possible.

Especially in the case of bulk certificates, this disadvantage is especially arise. A large number of such certificates are placed in front of one inspector in a short period of time. or the possibility of testing other than by simple observation, which is not extremely intensive. The result is that there is almost no one. A typical example of such a bulk certificate is a ride. tickets, admission tickets and such title deeds, which deeds further include, for reasons of cost, The standard for signs against counterfeiting (nacharmungswidrig) is generally It's not as expensive as paper money.

Another drawback is which characteristics must be used to make each certificate presumptively genuine. Potential counterfeiters have to imitate signs. alscher) can be recognized relatively without problems.

European Patent Publication No. 90130 describes a method to overcome the above-mentioned drawbacks. It is shown. This method for controlling the authenticity of certificates of the color reaction system known by photo paper (carbonless copy paper or NCR paper) Working according to the principle, the cough color reaction system is based on an electron-emitting capsule (Farbbi). ldner) and a color developer that absorbs electrons (Farbentwickler). including. As a color developer, for example, toner (Tone), attapulgite (Att. apulgit), zeolite, bentonite and kaoli Kaolin, or phenolic resin is used, and is made into an encapsulated body. Ionic dyes (kationische Farbstoffe) are colorless. (or very weakly colored) Leukoform L (Leukoform) , for example, crystal violet lactone (Kristallviolett- Lactori) or Benzoyl leucomethylene brau (Benzoyl Ie) ukomethylenb]aU).

One of the components of both, especially the color developer of the color-reactive system, is certified as safe against counterfeiting. It is carried as one layer on at least a portion of the surface. Another ingredient, i.e. The molded body contains a colored marker liquid which is mounted on the certificate to be inspected for control purposes. It's inside. In a certificate of authenticity, a color reaction occurs between the components of the color reaction system, and the color reaction causes the development of a color different from the original color of the marker liquid. For non-authentic certificates, the mark is It appears in the color of the marker liquid.

The solution according to European Patent Publication No. 90130 requires only a few suitable documents. (a+obHen) The genuineness is discreetly tested at the expense of auxiliary means. It has the advantage of being able to

Besides this advantage, however, there are still disadvantages. Therefore, the counterfeiter changes the safety certificate later. The counterfeiter then carries one component of the color-reactive system onto the paper. layer and make the desired change to the visible reactive color on the document. Another drawback is that mastery Knowledge of the underlying reaction principle makes it easier for counterfeiters to obtain safety paper later. For example, cardboard (Kartonbla) tt) with a color developer, or a suitable husband himself for another purpose. Procuring cardboard that has been prepared and already layered, thus e.g. - It is said that it is relatively easy to forge, for example, colored cardboard using a copying machine. It is recognized that

The invention will now be described. It is an object of the present invention to overcome this remaining drawback of the prior art. Is Rukoto.

This problem has been solved by the invention by uniformly distributing the color developer on the paper. . This means that the color developer is already ready before web formation. added to a piece of paper, i.e. incorporated into it (eingearbeitet) .

In the direction of the present invention, as a color developer, - e.g. Silton, Bentonite, Activated clay quality like attapulgite (Clay-Qualitat) or treated processed anhydride, aluminum silicate, magnesium silicate synthetic products like - Unique zinc salicylate linkage (Zinksalizylat-Verbin (dung) - para-phenylphenol, rose alkylphenol with formaldehyde Recognized as a phenolic resin, such as a condensate product of alcohol.

When the safety paper of the present invention is brought into contact with the marking liquid containing the envelope, the color developer present in the paper The reaction between the molded body and the envelope no longer exists on the surface as usual, and the reaction between the exists in In this case, the mark soaks into the paper and then bleeds onto the other side of the paper. , ie the landmark is formed mirror-image there. Each of these landmarks has its own characteristics. Removal from the deed is no longer possible without damaging the document. deer In particular, safety concerns indicate that papers with integrated color developers represent genuine safety papers. more fundamentally enhanced, i.e. special paper mentioned at the beginning (e.g. fluorescent filling) objects, plansets, watermarks, metals, etc.) are the same, and special paper cannot be used by anyone. I can't put it in. Another advantage is that landmarks can be placed on both sides with the same result. It is in being able to do. Previously paper had to be layered on both sides whereas It was.

In the present invention, all leucobases known from NCR Gi's technology can be used as color formers. A substance can be inserted into the pure substance. However, the desired reaction color can be adjusted as usual. It is possible. At that time, the original color of the marking liquid should be as clear as possible from the color produced by the color reaction. The colors are selected so that color superposition is possible.

In other cases, it is possible to consider that the marking liquid includes only the envelope as a general color medium. It is. The color of the [invisible mark] of such quantity, which is only visible on the original certificate, is However, it is less convenient because there is no sign of counterfeiting (Nicht-Er). scheinen) may also lead to incorrect conclusions in the examiner. , and the landmark device is useless. Furthermore, for example, the place of railway tickets on supranational railway lines. It is also common in many cases of use, such as when den Ausgebern) and which is achieved by the present invention. Certificates that do not have a can be used.

In another form of the invention, a portion of the surface of the safety paper has a neutral color on one or both sides. alisations farbe). Neutralized like that The original color of the marker liquid will appear because no color reaction will occur in the marked area when marking is applied. do. In the non-neutralized areas of the paper, on the other hand, the gap between the envelope and the color developer A color reaction passes and an overlapping color appears. This means that the original color is immediately different from the overlapping color. A person who is able to compare time and at the same time lacks that primary color vision (farbfe) Particularly quick and reliable control by hlsichtige Personen enable rules.

Another possibility for color differentiation is stamp pads consisting of several parts (Sten+Pelkisse). n), and the stamp pad has a small number (at least one part is visible). containing the stamping fluid without the encapsulant, and at least one other portion of the stamp base containing the encapsulant. Contains a marking liquid with a molded body.

When marking the certificate, a color reaction occurs in the area with the envelope, while the other part of the colored body Since the color reaction does not occur in the dark areas, the original color of the marker liquid becomes visible here. .

Other marks of authenticity known to the paper, such as watermarks, fluorescent fillings, etc. The ability to possess the power of When this happens, it can be appropriately adopted for enhanced authenticity testing. At that time, The fact that the striped pattern appears much more clearly in the paper according to the invention than in other cases It is then manifested as something quite special and unexpected.

The following examples illustrate the invention in detail without limiting it to these examples.

Conventionally, for example, phenothiazine leucobase (Ph) is stamped in green or red stamp color. enothiazin-Leukobase) (“Burgascript Blue S-4G ``Pergascript BIau S 4G'') is melted as a packaged body. (gelOst).

A watermark paper is prepared as the paper, and the watermark paper is activated as a color developer. Contains Atanogurgite. This paper is now printed with stamp colors that include envelope moldings. When printed, the stamp printing force appears in dark blue. Stamp printing, which occurs in the same way, lacks and changes the reaction partner for the package. rather it has its original green or red color, thereby giving it the appearance of a watermark as another intrinsic feature. With the result that the existence of or at least as “as inauthentic as possible.”

The results show whether and how watermarked paper and uncoated plain paper print. It has nothing to do with what happens.

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Claims (3)

[Claims] 1. A marking device allows color moldings to be attached to paper containing a color developer. , a color reaction system consisting of a color molded body and a color developer, based on the principle of pressure-sensitive copying paper. on safety paper for the production of certificates that can be verified as genuine by , a safety paper characterized in that the color developer is uniformly distributed on the paper. 2. A claim characterized in that part of its surface is coated on one or both sides with a neutral color. Safety paper as described in Section 1. 3. The paper has additional safety features known in itself, such as watermarks, fluorescent fillings, etc. The safety paper according to claim 1 or 2, further comprising a label.