The paper is protected from a fake

 

(57) Abstract:

The paper is intended to provide the identification of the authenticity of documents, banknotes, bonds, checks, tickets, cards and other types of securities or commercial paper. In the paper composition is administered at least two chemical reagent, each of which provides a flow of color reaction of the chemical reagent and the indicator of authenticity with a speed that does not match the velocity of the color response of each of the other chemicals with this indicator of authenticity. The color, at least one of the reaction products of each chemical reagent indicator of authenticity is different from the color of at least one of the reaction products of each of the other chemicals with this indicator of authenticity. The technical result is to increase the effectiveness of the protection of printed documents from forgery due to the difficulty of decryption and playback of the composition of the paper. 13 C.p. f-crystals.

The invention relates to valuable papers and can be used for the identification of the authenticity of the documents, in particular banknotes, bonds, checks, tickets, cards and other kinds of valuable eldat two chemical each of which provides a flow of the color reaction at a temperature that does not coincide with the temperature of the flow of the color reaction, other chemical reagent, the color of the reaction product of each chemical reagent different from the color of the reaction product of another chemical.

The disadvantage of this analog is the high complexity of the manufacture of paper, introducing a color-forming reagent in the composition of the paper using molten microcapsules.

The closest analogue for the device is a paper that described in the patent FR 2694772, 18.02.1994, D 21 H 21/46, which injected a chemical reagent, providing course the color reaction with the indicator of authenticity.

The main disadvantage of the prototype is not a high efficiency protection against counterfeiting because of the relatively simple framework for analysis and interpretation of composition as a chemical reagent and indicator of authenticity.

Thus, the problem to which the invention is directed, is to create a paper that facilitates the proof of identity or impeding the counterfeiting of printed documents.

Technical result achieved reliability protect printed documents from forgery due to the difficulty of decryption and playback of the composition of the paper.

The paper is protected from a fake, contains at least two chemical reagent, each of which is designed in such a way that ensures the flow of the color reaction of the chemical reagent with the indicator of authenticity with a speed that does not match the velocity of the color response of each of the other chemicals with this indicator of authenticity. The color, at least one of the reaction products of each chemical reagent indicator of authenticity is different from the color of at least one of the reaction products of each of the other chemicals with this indicator of authenticity.

In addition, in the particular case of the invention, the concentration of at least one of the chemical reagents may be within such limits that ensures the flow of the color reaction of the specified chemical indicator of authenticity with a predetermined speed.

In addition, in the particular case of the invention, at least one of the chemical reagents may be incorporated into the paper web.

In addition, in the particular case of the invention, at least one of the chemical reagents can the reagent.

In addition, in the particular case of the invention, at least one of the chemical reagents may be included in the paper by impregnation of the paper web with a solution of the corresponding primary reagent and subsequent processing of the impregnated paper web precipitator.

In addition, in the particular case of the invention, at least one of the chemical reagents may be included in the paper by mixing paper pulp with the specified chemical reagent.

In addition, in the particular case of the invention, at least one of the chemical reagents may be included in the paper by mixing the pulp with a solution of the corresponding primary reagent and further processing the mixture by the precipitator.

In addition, in the particular case of the invention, at least one of the chemical reagents may be a colorless coupler connection of groups of chemical elements.

In addition, in the particular case of the invention, the final products of the reaction, at least one of the chemical reagents with the indicator of authenticity may be colorless.

In addition t the b a compound of the metal.

In addition, in the particular case of the invention, the solution of one of the chemical reagents may be an aqueous solution of potassium thiocyanate solution of the other reactant may be a yellow blood salt, the precipitator may be a polyhexamethylene guanidine, and the indicator of authenticity can be an aqueous solution of trivalent iron nitrate, acidified with nitric acid.

In addition, in the particular case of the invention, the solution of one of the chemical reagents may be an alcohol solution artcreation, the solution of the other reactant may be a divalent iron sulfate, the precipitator may be an aqueous solution of acid phosphoric acid sodium, and the indicator of authenticity can be an alkaline solution of yellow blood salt.

In addition, in the particular case of the invention, the solution of one of the chemical reagents may be an alkaline solution artcreation, solutions of other reagents may be an aqueous solution of diethylaniline and sulphate of zinc, the precipitator may be an aqueous solution of an acidic phosphoric acid>/P>In addition, in the particular case of the invention, one of the chemical reagents may be an iron sulfate, another agent can be an acid phosphoric acid sodium, and the indicator of authenticity can be a solution of sodium azide.

Below are examples of the invention, the flow rate of each of the color-forming reagent was 0.1-0.2% of the weight of the paper.

Example 1. Pulp or paper treated with an aqueous solution mixture of potassium thiocyanate (KCNS) and yellow blood salt (K4[Fe(CP)6]) with subsequent deposition of these reagents polyhexamethylene guanidine.

As an indicator of authenticity used a 5% aqueous nitrate of iron III [Fe(NO3)3] was acidified (pH 1-2) with nitric acid (oxidizer). The result has been a change in color of the treated areas of the paper from light yellow-brown to black for 20-30 seconds. Time changes color depends on the concentration of nitric acid.

Example 2. The paper was sequentially treated with alcoholic solution of artcreation and iron II sulfate (FeSO4), and then iron salts were transferred to insoluble in water formula 5% alkaline solution of yellow blood salt. The result has been a change in color of the treated areas of paper from red to blue within one minute. The reaction rate depends on the concentration of alkali in the indicator or acidic salt in the reagent.

Example 3. Pulp or paper sequentially processed acidified aqueous solution of sulphate of iron III (Fe2(SO4)3and an aqueous solution of acid phosphoric acid sodium. As an indicator of authenticity used 5% alkaline solution of sodium azide (NaN3). The result has been a change in color of the treated areas of the paper from brown to light yellow for 30 seconds, followed by bleaching approximately 2-3 minutes Time of color change is determined by the concentration of alkali in the indicator or acidic salt in the reagent.

Example 4. Pulp or paper sequentially treated with an alkaline solution of artcreation, an aqueous solution of diethylaniline and sulphate of zinc. To neutralize the alkali, sedimentation and impairment of artcreation, as well as for deposition of sulphate of zinc produced treatment with an aqueous solution of phosphoric acid sodium (NaH2PO4).

As an indicator of authenticity used the people of paper from purple-red to bright yellow-green for one minute. The reaction rate is determined by the concentration of alkali in the indicator or acidic salt in the reagent.

Thus, the use of these reagents or other reagents corresponding to formula of the invention, helps to protect the paper against forgery simple and accessible methods to identify paper or a printed document, for example, when determining the authenticity of the document or the manufacturer of the paper web.

Authentication authentication is as follows.

On paper or document executed on paper, containing color-forming reagents, put the indicator of the authenticity of the corresponding composition. As a result of chemical reactions, surface color paper varies in predetermined way. In this case, the identification is performed as to change color, for example, the color transition, and the rate of change in color when exposed to light.

If painted are only intermediate reaction products, and final products of the reaction are colorless, the impact of light on the paper leaves no visible traces, resulting in the appearance of the document is not changed.

the girl so that provides a flow of the color reaction of the chemical reagent with the indicator of authenticity with a speed that does not match the velocity of the color response of each of the other chemicals with this indicator of authenticity, the color of at least one of the reaction products of each chemical reagent indicator of authenticity is different from the color of at least one of the reaction products of each of the other chemicals with this indicator of authenticity.

2. Paper under item 1, in which the concentration of at least one of the chemical reagents is within such limits that ensures the flow of the color reaction of the specified chemical indicator of authenticity with a predetermined speed.

3. Paper under item 1 or 2, in which at least one of the chemicals included in the paper.

4. The paper by p. 3, in which at least one of the chemicals included in the paper web by impregnation of the paper web with a solution of a specified chemical.

5. Paper under item 1 or 2, in which at least one of the chemicals included in the paper by propick is per blade precipitator.

6. Paper under item 1 or 2, in which at least one of the chemicals included in the paper by mixing paper pulp with the specified chemical reagent.

7. The paper by p. 6, in which at least one of the chemicals included in the paper by mixing the pulp with a solution of the corresponding primary reagent and further processing the mixture by the precipitator.

8. Paper according to any one of paragraphs.1-7, in which at least one of the chemical reagents is a colorless coupler connection of groups of chemical elements.

9. Paper according to any one of paragraphs.1-8, in which the final products of reaction of at least one chemical indicator of authenticity are colorless.

10. Paper according to any one of paragraphs.1-9, in which at least one chemical reagent is a compound of the metal.

11. Paper under item 5 or 7, in which the solution of one chemical reagent is an aqueous solution of potassium thiocyanate solution of the other reactant yellow blood salt, precipitator - polyhexamethylene guanidine, and the indicator of authenticity is an aqueous solution of ferric nitrate of iron, podcas dstanley an alcoholic solution of artcreation, the solution of the other reactant - ferrous sulfate iron precipitator - water solution of the acid phosphoric acid sodium, and the indicator of authenticity - alkaline solution of yellow blood salt.

13. Paper under item 5 or 7, in which the solution of one chemical reagent is an alkaline solution artcreation, solutions other reagents aqueous solution of diethylaniline and sulphate of zinc, precipitator - water solution of the acid phosphoric acid sodium, and the indicator of authenticity - alkaline solution of sodium nitrate.

14. Paper under item 1, in which one of the chemical reagents is an iron sulfate, another reagent acid phosphate sodium, and the indicator of authenticity - solution of sodium azide.

 

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FIELD: designs or pictures characterized by special or unusual light effects.

SUBSTANCE: safety paper has a layer characterized by variable optical properties, made semitransparent, with transparency from 20 to 80%, and provided with coloring agent composed of optically changeable pigments.

EFFECT: enhanced protection.

1 cl, 2 dwg

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