ES2234647T3 - REGISTRATION ROLE WITH A COMBINATION OF VARIOUS SAFETY FEATURES. - Google Patents

Abstract

The invention relates to a recording paper (I) comprising at least two of the following security features (1), (2), (4) and (5), or (II) comprising at least one of the following security features (2), (4), and (5) and at least one of the following security features (1) and (3): (1) a water-insoluble dye (A) which is incorporated into the paper and which bleeds when placed in contact, for example, with an organic solvent; (2) a dye (B) which is applied to the rear side and which becomes fluorescent in daylight when brought into contact with an alkaline substance; (3) a watermark (4) is incorporated into the paper or printed thereon; (4) cellulose which is placed in the paper, is imbued with a dye (C) and/or is treated with an optical brightening agent, and which becomes fluorescent when exposed to UV radiation, and; (5) a layer applied to the rear side, which comprises acceptors and encapsulated microcapsules containing color formers, whereby the color formers enter into a color forming reaction with the acceptors by means of pressure.

Description

Registration paper with a combination of several safety features

The invention relates to a registration paper With a combination of several security features. Further, the invention describes, with respect to a characteristic of security, a procedure for verifying authenticity of a registration paper according to the invention.

Registration papers determine in life daily life of society and professional life. They have already been proposed in the past different solutions for registration papers with security features for applications such as transfer forms or checks, diplomas, certificates, packaging papers for pharmaceuticals, banknotes lottery, stamps or, in general, as prints or copies, whose manufacturing, authorized by using the papers characteristic and allowed for this purpose, it has to be checked. Along with the verification of authenticity there is also, for a large number of such papers, the interest of Protect against subsequent fakes.

The use has been known for many years of watermarks as a security feature for documents whose authenticity, in the form of a passive analysis, must be checked. The use of security threads was also proposed checked in the same way.

Document DE 195 01 289 A 1 shows the application, for a heat-sensitive recording paper, of fibers colored and fluorescent under ultraviolet irradiation, which they are mixed in small quantities with the paper fibers before the formation of the leaf, which, however, entails prolonged cleaning stops on paper machines thus causing considerable technical disadvantages in production. The same time, scrap of paper made in this way can Recycle only in a very restricted way, due to the fibers Synthetic visible to the naked eye.

In document DE 25 18 871 A 1 a Safety feature for non-stick paper that provides on the support paper, or on it, two similar substances, the which contain at least one chromophore, in the form of a compound azo, and at least one dye or pigment. Within the framework of a active analysis can be applied on paper, for the verification of authenticity, a reagent through a seal, a marker or roller device where the substance reacts with the reagent on the support paper with the appearance of coloration. The security feature, thus described, can be combined with a watermark as a safety feature additional.

It is known from document DE 296 17 106 U 1 the use of dyes or pigments with anthraquinonic base as Only security feature. These dyes or pigments, applied on the mass of paper or incorporated on the surface of the paper, can be diluted with an acetone treatment to Verify the authenticity of the paper. Document DE 0 072 481 B 1 provides a mixture of acid 2- (4'-amino-3'-sulfophenyl) -6-methylbenzothiazol-7-sulfonic  or its salts for a safe counterfeit paper, where a verification of authenticity is planned with a dissolution of diluted potassium permanganate. Document DE 27 47 349 C 2 discloses, as the only security feature for secure papers against counterfeits, which should be used especially For payment instructions to be filled in by hand, the use of pyrenesulfonic acids or their metal salts in the mass of paper or on the surface of the paper.

For the recognition of manipulations mechanics in completed forms, for example by erasing, scraping, writing off with adhesive tape or similar, document DE 298 15 121 U 1 discloses the display of a painting on inkjet printing papers, whose mixture Pigment is composed of precipitated silicic acid and at least one absorption pigment that absorbs excitation radiation in the ultraviolet or visible spectral range.

It is known from EP 0 844 097 A 1 a heat sensitive recording material, which presents, as a First security feature, a printed latent image on its back side, produced by a security ink which contains a fluorescent reagent. For the development of a second security feature in the form of an image waterproof on the back side of the record material heat-sensitive, the security ink contains a water-repellent agent. The fluorescent reagent used as a pigment or dye and the Safety ink containing the water repellent agent is contained or dispersed in an aqueous support, which may also contain a binder, in addition to these components. It is a disadvantage of this proposed the fact that the provision of preprints by usual printing procedures, due to the water-resistant nature of the security ink.

It is known by the document DE-A-39 18 765 a security paper for the production of documents, in which, for the manufacture of a color mark, a color developer is added to paper pulp as a component of a system of two components already before the formation of the strip, or the paper (conveniently on both sides) is coated or impregnated with the color developer. If one color former, like the other component, comes into contact with the developer, a change originates of color, which confirms the authenticity of the document. For one further improvement of security against counterfeiting, paper can be additionally provided with watermarks or layers fluorescents not defined in detail.

The document FR-A-2 539 533 refers to a method for identifying security papers sensitive to pressure and heat sensitive. To that end it is added to the fibers of paper a suitable titrant dye, for example with a base pyrenesulfonic or a mixture of dyes. If the surface of a sheet of paper, which contains one of these dyes, contact with a marker or pen containing an organic solvent or mixture of organic solvents, especially a mixture of alcohol benzyl and diethanolamine, a visible coloration originates at simple sight The mixture of benzylalcohol and diethanolamine is adequate also for the development of color reactive components encapsulated in self-copying registration papers or in thermosensitive record. While in registration papers self-dissolution is achieved a dissolution of the envelopes of the microcapsules and, thus, the color former can enter in contact with the developer, must take place, in papers of thermosensitive record, a solution of the developers present in solid form, and then a color reaction. Not taken in consideration a combination of watermarks marked as no sufficiently safe, or fluorescent fibers not defined in greater detail with the disclosed color marking system, the mentioned in this document as belonging to the state of the technique.

The mission of the present invention consists in create a combination of several security features to registration papers, which materializes the realization of simple authenticity analysis and you get it for another part, effective protection against counterfeit attempts, the which can be used in some way for the realization of cross analysis for the verification of authenticity. The same time, the registration papers to make available, must be provided on the front and back, without problems, of the Prepress calls.

The solution of the previous problem foresees a role registration, with a combination of several features of security, which is characterized by the following combination of safety features (1), (2), (3), (4) and (5):

one

and where the characteristics of security They are:

-

(1) a dye (A) insoluble in water incorporated into the paper and invisible to simple sight, which, when a surface is moistened with a organic solvent or an acid, causes a visible coloration, when less on the face opposite the face on which the registry,

-

(2) a dye (B), only slightly visible in the acidic pH range or neutral in daylight, which is applied with a regular pattern or irregular over the entire surface of the face opposite to the face on which the registration is planned and suffers, in contact with an alkaline substance, a color reaction that results in a durable daylight fluorescent color,

-

(3) a watermark incorporated into the paper or printed on the paper,

-

(4) cellulose incorporated into the paper, which has been dyed with a dye (C) and / or treated with an optical brightener, which is fluorescent under UV irradiation,

-

(5) a layer SC that is applied to the face opposite the face on which it is planned registration and in which they are acceptors and microcapsules containing encapsulated color formers, in where color formers produce a coloring reaction with the acceptors when they are under pressure.

Within the framework of numerous investigations The following were especially effective combinations of two characteristics: 1 + 2; 1 + 5; 2 + 5.

In the combination of the characteristic of security (2) with the safety feature (5) the pattern of dye B, regular or irregular, is applied on the SC layer previously applied

In combinations of more than two safety features, the application by parts of the safety feature (5) is the embodiment preferred.

Without the invention being limited to combinations of more than two safety features mentioned In the following, security effects have been shown especially accented in the following combinations of more than two of the safety features indicated in claim 1:

(1/2/3), (1/2/4), (1/2/5), (1/3/5), (1/4/5), (2/3/5), (2/4/5);

(1/2/3/4), (1/2/3/5), (1/3/4/5)

By dosing and type of dye (A) as a safety feature (1), indicated in the subordinate claims, not only a authenticity check, as defined in more detail in the subordinate claims and among which it is to understand a verification of the authenticity of the registration paper according to the invention, as well as the recognition of attempts to falsify registration.

It has been shown suitable for the dye (A) an amount incorporated in the paper from 0.005 to 0.1% by weight, referred to the "atro" part of the dye, especially a amount from 0.01 to 0.03% by weight. As a dye (A) you can An azine or anthraquinonic dye should be used.

An irregular pattern formation with respect to colorant (B) applied as a safety feature (2) preferably corresponds to a fine grain structure, which, expressed in another way, it can be called a splash, while the regular pattern preferably corresponds to a structure in the form of strips. In daylight, the requested face with the dye (B), which faces the face opposite the face scheduled for registration, appears slightly colored to simple view.

Preferred embodiments of the invention of the dye (B) mentioned in the claims subordinate, enable, especially when the dye is soluble in water and applied without binder, the solution of problem of correct printing on the back by means of printing flexo or offset printing, when it is required in certain fields of application such as, for example, lottery tickets. An appropriate application weight is in the range of one mass referred to an area of 0.01 to 40 mg / m2, especially in a range of 0.05 to 7.5 mg / m2. Is especially preferred that the pattern formed from the dye (B) be fluorescent under ultraviolet irradiation. How especially suitable as dye (B) a pyrenenesulfonic base dye.

For the formation of fluorescence in the Cellulose to be used in accordance with the safety feature (4), a base dye (C) has been especially advantageous styrenic and fluorescent under ultraviolet irradiation, because with he does not bind any annoying coloration of the paper in the light of day nor of the material and water circuits used in the machine of papermaking within the framework of production. He procedure for coloring a part of the cellulose to use is not an object of the present invention and can be carried out in advantageous form, because the cellulose to be dissolved dissolves separately with water containing the dye (C) above described in a shredder, where a 0.03-3% range of dye (C), referred to the cellulose to treat. An especially high efficiency, with respect to Verification of the authenticity of the agreement registration paper with the invention, it is achieved when the fluorescence of the dye (C), used for the treatment of cellulose under irradiation UV is different from the fluorescence of the dye (B), which It is used to create the security feature (2). Further, to achieve a high efficiency of a verification of the authenticity that uses the security feature (4), is regulates a clearly recognizable difference in the degree of coloration, or in the degree of luminosity of the cellulose part colored with a dye (C) and / or treated with a brightener optical, compared to the remaining part of cellulose not colored or poorly colored and / or not polished or poorly polished optically

As cellulose for characteristic (C) it can a cellulose of one-year-old plants or wood of conifer, which is preferably not crushed.

The registration paper according to the invention preferably contains 0.005-3% by weight, preferably 0.05-0.5% by weight, of cellulose fluorescent, referred to its cellulose content.

The mass referred to a surface of the SC layer which forms the safety feature (5) is in the range from 1 to 10 g / m2, preferably in the range from 4 to 7 g / m2. A composition is indicated below suitable of the SC layer without the invention being limited to this composition:

20 to 50% in microcapsule weight, preferably 25 to 40% by weight

20 to 60% in color of color acceptor, preferably 30 to 45% in weight

8 to 40% in binder weight, preferably 10 to 25% by weight

5 to 30% in separator weight, preferably 8 to 20% by weight.

How separators are considered starch inhibited and / or cellulose powder. The color tone produced as consequence of printing, as a reaction of the color former with the acceptors in the SC layer, it is preferably found in contrast with the color of the SC layer. A training only in some parts of the SC layer representing the safety feature (5), which also enables the recognition of attempts to forgery of registration, has been especially convenient when combined with the safety features (1) and / or (4), to simplify a verification of authenticity by taking advantage of the safety feature (1) and, on the other hand, to make visible cellulose fluorescence according to the safety feature (4).

The combinations according to the invention of security features are preferably used for paper inkjet printing, especially for a paper inkjet printing presenting a receiving layer for the inkjet printing. Another preferred embodiment provides combinations according to the invention of security features for a registration paper that presents a heat sensitive recording layer. Very especially preferred is, in this case, the introduction of a pigmented layer between the paper and the thermosensitive record layer. In addition, it is preferred that over the heat sensitive recording layer is applied a layer of protection.

As a procedure to verify the authenticity of a registration paper that you submit in accordance with the invention a safety feature 1 - eventually corresponding to the embodiments indicated in the subordinate claims 8 to 10, has been shown adequate a procedure, in which the surface of the face opposite the face intended for registration, moistened with a mixture of a Primary alcohol, a secondary alcohol and an acid. Humidification it is preferably carried out in this case by means of a tip of test, sponge or seal.

The watermarks mentioned as safety features (3) means, in the sense of the invention, authentic watermarks produced on the papermaking machine in the wet paper web, the so-called motos or printed marks stamped on the wet paper band, the so-called pseudo marks of
Water.

Azino dyes are understood, in the sense of the invention, dyes characterized by a pyrazine ring (paradiazine ring) with condensed aromatic nucleus.

By preprints is understood in the description of the present invention, for example prints applied by flexo printing or offset printing, especially offset printing dry or anhydrous, such as, for example, inscriptions on forms, in which you can fill in the fields of the form, for example using an inkjet printer or a thermal printer for subsequent use in accordance with the provision.

The indications made in the description and claims to the mass referred to a surface and% in weight refers to the "atro" weight, that is, parts by dry weight absolute.

Registration papers in accordance with the invention, along with the five safety features claimed according to claim 1 with its variants of preferred embodiments, equivalent to all claims subordinates may also have other characteristics of security.

Without limiting it, they can be used in the context of the present invention the registration layers thermosensitive known from the following reports: DE 29 29 102 A1; DE 29 37 915 A1; DE 32 37 247 A1; DE 32 42 262 A1.

Without limiting it, they can be used within the framework of the present invention the receiving layers of inkjet printing known from the following memories: DE 32 37 381 A1; EP 0 524 635 A1; EP 0 602 230 A1; EP 0 602 400 A1.

The following Examples explain the invention, Without limiting this:

Production of paper bands

Within the framework of a series of essays it is prepared a mixture (a) from deciduous and coniferous cellulose bleached and crushed, with the addition of the usual substances in a crusher with a density of 3.8%.

A cellulose is treated in a second crusher bleached conifer, not crushed, with styrenic dye Pergasol F-6G® (Ciba Spezialitätenchemie GmbH), which produces a yellowish fluorescence under UV irradiation, for preparation of a second mixture (b). This adjusts one 2% density. 0.3% dye is added to the dissolution water, referred to cellulose (atro) to be treated.

The mixture (b) is added to a mixture of fibers (d) colored with black lacquer Nigrosin H® (blue dye from Bayer AG), which, for the rest, is equivalent to the mixture (a), for the preparation of the mixture (e). About a sieve paper making machine thick is prepared, from the above a paper band (I), which presents the safety features (1) and (4), with a mass referred to an area of 87 g / m2, in which at 99.9 parts by weight of cellulose of the mixture (d) correspond 0.1 parts by weight of cellulose of the mixture (b). The amount of dye added corresponds to 0.05% by weight, based on the cellulose of the mixture (e).

A paper band (II) is prepared using the same mixture (e) with a mass referred to an area of 87 g / m2, with simultaneous use of a drop dispenser that Produces watermarks. This paper band (II) presents the safety features (1), (3) and (4).

By using only the fiber blend (d), prepares, in a thick sieve paper making machine, a paper strip (III) presenting the safety feature (1) with a mass referred to an area of 87 g / m2.

By simultaneous use of a dispenser drops that produces watermarks, a paper band (IV) is prepared which presents the safety features (1) and (3), using the fiber mixture (d).

By using only the fiber blend (a), prepares, in a thick sieve paper making machine, a paper strip (V) with a mass referred to an area of 87 g / m2.

Through the simultaneous use of a dispenser drops that produces watermarks, a paper band is prepared (VI) presenting the safety feature (3), using the fiber blend (a).

The paper bands (I) to (VI) are provided in one of its faces of a starch preparation of 0.5 g / m2.

Examples 1-5

For the production of registration papers heat-sensitive paper strips (I) are covered up to (V) firstly on the face opposite the face on which it is intended starch preparation, with an intermediate layer containing a oil absorbing pigment and then provided with a layer of thermosensitive record. On the face provided with a preparation of starch the thermosensitive registration papers of a aqueous solution of a dye with pyrenesulfonic base, of so that an irregular pattern in the form of a structure originates fine-grained, which extends over the entire surface of this face of the paper band. 3.5 mg / m2 are applied. The thermosensitive registration papers, obtained in this way from of the paper bands (I) to (IV), are indicated as Examples 1-4 in Table 1 with its characteristics of security. The paper band (V), provided with a registration layer thermosensitive, is provided on its back side in some parts of an SC layer with an application weight of 5 g / m2 and finally provides for the entire surface of the solution of dye indicated in Examples 1-4. This paper of heat-sensitive record indicated in Example 5 contains the safety features indicated in Table 1.

Examples 1-5 are assigned the paper bands (I) to (V) as follows:

Example 1, paper band III

Example 2, paper band I

Example 3, paper band II

Example 4, paper band IV

Example 5, paper band V

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TABLE 1

2

For the production of registration papers for the inkjet printing paper bands are provided (III) up to (IV) and (VI) on one side of a receiving layer for the inkjet printing.

Examples 6 and 7

Registration papers prepared from the paper bands (III) and (IV) for jet printing of ink are coated, as indicated in Example 5, lines 1-3, on the back side in some parts with a SC layer. The security features of registration papers prepared in this way are indicated in Table 2.

Example 8

A band of registration paper produced at from the paper strip (IV) it is coated, as indicated in the Example 5, on the back side both in some parts with a layer SC, as well as, additionally, on the entirety of the surface, with a dye solution according to the Examples 1-5. The registration paper contains the safety features indicated in Table 2.

Example 9

A band of registration paper produced at from the paper strip (VI) it is coated, as indicated in the Example 5, on the back side, both in some parts with a SC layer, as well as, additionally, over the entire surface, with a dye solution according to the Examples 1-5. The registration paper contains the safety features indicated in Table 2.

Examples 6-9 are assigned the paper bands (III), (IV) and (VI) as follows:

Example 6, paper band III

Example 7, paper band IV

Example 8, paper band IV

Example 9, paper band VI

TABLE 2

3

Claims (25)

1. Registration paper with a combination of several security features , characterized by the following combinations of security features (1), (2), (3), (4) and (5): 4 and where the characteristics of security They are:

-

(1) a dye (A) insoluble in water incorporated into the paper and invisible to simple sight, which, when a surface is moistened with a organic solvent or an acid, causes a visible coloration, when less on the face opposite the face on which the registry,

-

(2) a dye (B), only slightly visible in the acidic pH range or neutral in daylight, which is applied with a regular pattern or irregular over the entire surface of the face opposite to the face on which the registration is planned and suffers, in contact with an alkaline substance, a color reaction that results in a durable daylight fluorescent color,

-

(3) a watermark incorporated into the paper or printed on the paper,

-

(4) cellulose incorporated into the paper, which has been dyed with a dye (C) and / or treated with an optical brightener, which is fluorescent under UV irradiation,

-

(5) a layer SC that is applied to the face opposite the face on which it is planned registration and in which they are acceptors and microcapsules containing encapsulated color formers, in where color formers produce a coloring reaction with the acceptors when they are under pressure.

2. Registration paper according to claim 1, characterized in that the registration paper has, at least on its face intended to receive the registration, a receiving layer for the inkjet printing process or, at least on its face in the that registration is planned, a thermosensitive registration layer. 3. Registration paper according to one of claims 1 or 2, characterized in that the pattern formed from the dye (B) is fluorescent when subjected to UV irradiation. 4. Registration paper according to one of claims 1 to 3, characterized in that the dye (B) is applied to a mass referred to a surface in the range of 0.01 to 40 mg / m2. 5. Registration paper according to one of claims 1 to 4, characterized in that the dye (B) is applied to a mass referred to a surface in the range of 0.05 to 7.5 mg / m2. 6. Registration paper according to one of claims 1 to 5, characterized in that the dye (B) is soluble in water. 7. Registration paper according to one of claims 1 to 6, characterized in that the dye (B) is applied without binder. 8. Registration paper according to one of claims 1 to 7, characterized in that the dye (B) is a dye with pyrenesulfonic base. 9. Registration paper according to one of claims 1 to 8, characterized in that the dye (A) is incorporated into the paper in an amount of 0.005 to 0.1% by weight, based on the proportion of "atro" fiber. 10. Registration paper according to one of claims 1 to 9, characterized in that the dye (A) is incorporated into the paper in an amount of 0.01 to 0.03% by weight, based on the proportion of "atro" fiber. 11. Registration paper according to one of claims 1 to 10, characterized in that the dye (A) is an azine or anthraquinonic dye. 12. Registration paper according to one of claims 1 to 11, characterized in that the fluorescence of the cellulose stained with the dye (C) is colored under UV irradiation. 13. Registration paper according to one of claims 1 to 12, characterized in that the cellulose stained with the dye (C) comes from one-year-old plants. 14. Registration paper according to one of claims 1 to 12, characterized in that the cellulose stained with the dye (C) comes from coniferous wood cellulose. 15. Registration paper according to one of claims 1 to 14, characterized in that the cellulose is not crushed. 16. Registration paper according to one of claims 1 to 15, characterized in that the paper contains 0.005-3% by weight of fluorescent cellulose, based on its cellulose content. 17. Registration paper according to one of claims 1 to 16, characterized in that the paper contains 0.05-0.5% by weight of fluorescent cellulose, based on its cellulose content. 18. Registration paper according to one of claims 1 to 17, characterized in that the mass referred to a surface of the layer SC is comprised between 1 and 10 g / m2. 19. Registration paper according to one of claims 1 to 18, characterized in that the mass referred to a surface of the layer SC is comprised between 4 and 7 g / m2. 20. Registration paper according to one of claims 1 to 19, characterized in that the SC layer is applied only in some parts. 21. Registration paper according to one of claims 1 and 3 to 20, characterized in that the registration paper is a paper intended for the inkjet printing process. 22. Registration paper according to one of claims 2 or 20, characterized in that the registration paper has an intermediate layer containing a pigment between the paper and the heat sensitive registration layer. 23. Registration paper according to one of claims 2 to 20 or 22, characterized in that a protective layer is incorporated into the heat-sensitive registration layer. 24. Procedure for verifying the authenticity of the recording paper according to one of claims 1, 2, 9, 10 or 11, characterized in that the surface of the face, opposite the face on which the recording is provided, is moistened with a mixture of a primary alcohol, a secondary alcohol and an acid. 25. Procedure for verifying the authenticity of the registration paper according to claim 24, characterized in that it is moistened by a sample needle, a sponge or a seal.