CN1078713C - Silver-salt photosensitive anti-forge technology - Google Patents
Silver-salt photosensitive anti-forge technology Download PDFInfo
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- CN1078713C CN1078713C CN 98102845 CN98102845A CN1078713C CN 1078713 C CN1078713 C CN 1078713C CN 98102845 CN98102845 CN 98102845 CN 98102845 A CN98102845 A CN 98102845A CN 1078713 C CN1078713 C CN 1078713C
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Abstract
In the present invention, according to sensitive chemical principles, sensibilized silver salt emulsion is spread on a film base to prepare the film base into a sensitive layer, a desensitiser is spread on the sensitive layer of the silver salt emulsion in the modes of specific figures or characters, through illumination, argentum atoms contained in parts without the coating of the desensitiser separate out quickly, the argentum atoms contained in parts coated with the desensitiser separate out slowly, and therefore, the specific figures or characters composed of the argentum atoms appear. The present invention is used for the identification of imitations.
Description
The present invention relates to photosensitive anti-counterfeiting technology.More particularly, the present invention relates to a kind of silver salt emulsion and adopt it and chemical sensitization and/or optical sensibilization to come false proof method.
Though anti-counterfeiting technology kind in the market is more, all has different problems.For example, the easy quilt that has is imitated; What have is not easy to identify; The Special Equipment that needs that has could detect, and popularization acquires a certain degree of difficulty; What have can be with reusing after the recycling of packaging, thereby lose anti-fake effect or the like.This class anti-counterfeiting technology mainly comprises: adopt anti-counterfeiting technologies such as computer-generated hologram coding, optically variable films, nuclear radiation, fluorescence, laser, thermoprint, carbon-free pressure-sensitive manifolding to carry out false proof.
CN1100504 has reported the method for black box of the false proof and software protection of a kind of credit card, certificate and trade mark, can be used for anti-false sign and software protection, a kind of " function " is sealed in the shell, only with electric signal with get in touch outward.Anti-broken shell measure a lot (as wiring in the shell, photosensitive, fill with certain air pressure or material, be divided into multilayer multicompartmented etc., and various combination).The anti-broken shell scheme of each product is seldom heavy mutually.Related to photosensitive in the anti-broken shell measure in the document.
Obviously, these technology or false proof level is low, or expensive effort.Therefore, people expect to develop a kind of simple and convenient, photosensitive method for anti-counterfeit that quality is high and economic always.
Through the long-term research extensively and profoundly of the inventor, unexpectedly find a kind of anti-counterfeiting technology, it can solve the variety of problems of prior art.
An object of the present invention is to provide a kind of silver salt emulsion.
Another object of the present invention is that the employing silver salt emulsion is the method for anti-counterfeit of chemical sensitization and/or optical sensibilization.
Therefore, the present invention relates to following content:
1. a silver salt emulsion comprises silver chloride, silver bromide, silver iodide, silver tartrate, silver citrate and silver nitrate, and wherein, each component concentration ratio is respectively:
1 mole of silver citrate
Silver tartrate: 0.4-0.7 mole
Silver chloride: 0.3-0.6 mole
Silver iodide: 0.01-0.05 mole
Silver bromide: 0.2-0.7 mole
Silver nitrate: 0.001-0.05 mole
2. according to the silver salt emulsion of heading 1, wherein said silver salt emulsion carries out chemical sensitization with zinc paste, and the consumption of described zinc paste is a 1-10 gram/kilogram emulsion.
3. according to the silver salt emulsion of heading 1, wherein said silver salt emulsion carries out optical sensibilization with methine cyanines, cyclonite cyanines, polymethine cyanines or part cyanines, and its consumption is a 5-20 mg/kg emulsion.
4. according to the silver salt emulsion of heading 1, wherein said emulsion carries out desensibilization with desensitiser to be handled, and used desensitiser comprises: bifurcation piperazine class dyestuff, tetrazine class dyestuff, quinoxaline, nitro-derivative, some azo dyes, anthraquinone derivative, styryl derivative, anil, azacyanine, bipyridyl compound or single methyl Austria etc.
5. photosensitive method for anti-counterfeit may further comprise the steps:
The silver salt emulsion of chemical sensitization and/or optical sensibilization is applied on the sheet base makes photosensitive layer, with specific figure or written form desensitiser is applied on the silver salt photosensitive layer and handles, stick protective seam then to hide light to carry out local desensibilization.
6. according to the method for heading 5, wherein used light source is daylight, incandescent light, daylight light and/or ultraviolet light.
Different with the anti-counterfeiting technology of prior art, the present invention utilizes photosensitive colour-changing and sensitization technology to be undertaken false proof by the photochemical reaction appearing technique special sign.
The present invention uses the photographic chemistry principle, and a kind of new silver salt anti-counterfeiting technology is provided.That is to say, to be applied on the sheet base through the silver salt emulsion of sensitizing, make photosensitive layer, on the silver salt emulsion photosensitive layer, coat desensitiser again, after illumination with the form of specific figure or literal, be not coated with the part of desensitiser, silver atoms is separated out soon, scribbles the part of desensitiser, and silver atoms is separated out slowly, thereby show specific figure or the literal formed by silver atoms, be used to differentiate fakement.Do not need special equipment during detection, utilize daylight or general illumination light source to carry out easily.The present invention is achieved in that the preparation silver salt emulsion; Emulsion is carried out chemical sensitization and optical sensibilization; Coat and make photosensitive layer on the sheet matrix; On photosensitive layer, coat desensitiser more after drying with the form of specific figure or literal; Cut, pack and make photosensitive anti-counterfeiting mark, paste or hang on a certain position of commodity, when differentiating commodity true and false; protective seam on the photosensitive anti-counterfeiting mark can be torn, expose photosensitive layer, be put under the Different Light and shine different time; can show specific figure of certain commodity or literal, wherein
One, emulsion: form by gelatin or other protective colloids, silver chloride, silver bromide, silver iodide, silver tartrate, silver citrate and excessive silver nitrate.
Two, chemical sensitization: except that can carrying out according to a conventional method the chemical sensitization, also available zinc paste carries out chemical sensitization.
Three, optical sensibilization: utilize methine cyanines, cyclonite cyanines, polymethine cyanines, part cyanines (referring to skin lattice pressgang Jede, photograph chemistry (the 4th fascicle), P.84-209).
Four, coating: the silver salt emulsion that will carry out chemical sensitization, optical sensibilization is coated on the sheet base, as paper substrate, cellulose triacetate base, dacron chip base etc., makes photosensitive layer.
Five, desensibilization is handled: will be mixed with certain density desensitiser solution, the form with specific figure or literal is imprinted on the photosensitive layer that scribbles above-mentioned silver salt emulsion, and containing the special pattern or the literal that subtract quick material should be colourless, sunken shape before illumination.Cut at last, pack, make anti-counterfeiting mark.
Desensitiser comprises: bifurcation piperazine class dyestuff, tetrazine class dyestuff, quinoxaline, nitro-derivative, some azo dyes, anthraquinone derivative, styryl derivative, anil, azacyanine, bipyridyl compound, single methyl Austria etc. are (referring to skin lattice pressgang Jede, photograph chemistry (the 4th fascicle), P.294-309).
Six, manifesting of special pattern or literal: tear the anti-counterfeiting mark protective seam, expose photosensitive layer and with it under the sunshine, shine the some time under incandescent light, daylight light or the ultraviolet light, specific stealthy figure or literal can display.
Embodiment: press following formulated (A), (B), (C) three kinds of solution: (A) liquid: 500 milliliters of deionized waters
Gelatin 80 grams
Ammonium chloride 2 grams
Ammonium bromide 1.5 grams
Potassium iodide 0.5 gram (B) liquid: 150 milliliters of deionized waters
Tartrate 3.0 grams
Sodium bicarbonate 1.5 grams
Alum 1.9 gram (C) liquid: deionized water 160 milliliters
Citric acid 8.0 grams
Silver nitrate 30.0 grams
In 55 ℃ (± 1), mix (A) liquid and reach (B) liquid, under stirring (C) liquid is added in half an hour in the mixed liquor, place half an hour.Add powdery zinc oxide 2.5 grams, add again optical sensitizer 3,3 '-diethyl thiophene carbon cyanines salt compounded of iodine (0.1% methanol solution) carry out optical sensibilization for 12 milliliters, after adding other an amount of auxiliary agents (referring to G.F. Du Fen, P.165-173) the photographic emulsion chemistry, is coated on the barium base stock.The poly-vinyl alcohol solution of picric 1% solution of desensitiser and 2% is mixed, be imprinted on the emulsion layer with the specific stealthy figure or the form of literal.At last, cut packing, promptly make anti-counterfeiting mark.
Tear the anti-counterfeiting mark protective seam, the photosensitive layer that will expose shines under Different Light, and stealthy figure that it is specific or literal can display (seeing attached list) in the different time.
| Light source | Irradiation time (second) | Do not subtract the color of quick part | Subtract the color of quick part |
| The sunshine direct projection | 2-3 | Taupe | Yellow |
| 40 watts of incandescent lamps (5cm place) | 30-40 | Taupe | Yellow |
| 8 watts of daylight lamps (5cm place) | 30-40 | Taupe | Yellow |
| Room scattering light (200 Lux) | 150-180 | Taupe | Yellow |
Claims (6)
1. a silver salt emulsion comprises silver chloride, silver bromide, silver iodide, silver tartrate, silver citrate and silver nitrate, and wherein, each component concentration ratio is respectively:
Silver citrate: 1 mole
Silver tartrate: 0.4-0.7 mole
Silver chloride: 0.3-0.6 mole
Silver iodide: 0.01-0.05 mole
Silver bromide: 0.2-0.7 mole
Silver nitrate: 0.001-0.05 mole
2. according to the silver salt emulsion of claim 1, wherein said silver salt emulsion carries out chemical sensitization with zinc paste, and the consumption of described zinc paste is a 1-10 gram/kilogram emulsion.
3. according to the silver salt emulsion of claim 1, wherein said silver salt emulsion carries out optical sensibilization with methine cyanines, cyclonite cyanines, polymethine cyanines or part cyanines, and its consumption is a 5-20 mg/kg emulsion.
4. according to the silver salt emulsion of claim 1, wherein said emulsion carries out desensibilization with desensitiser to be handled, and used desensitiser comprises: azines, tetrazine class dyestuff, quinoxaline, nitro-derivative, some azo dyes, anthraquinone derivative, styryl derivative, anil, azacyanine, bipyridyl compound or single methyl Austria etc.
5. one kind is adopted the described silver salt emulsion of claim 1 to carry out false proof method, may further comprise the steps:
The preparation silver salt emulsion; Emulsion is carried out chemical sensitization and optical sensibilization; Coat and make photosensitive layer on the sheet matrix; On photosensitive layer, coat desensitiser more after drying with the form of specific figure or literal; Cut, pack and make photosensitive anti-counterfeiting mark, paste or hang on a certain position of commodity, when differentiating commodity true and false; protective seam on the photosensitive anti-counterfeiting mark can be torn; expose photosensitive layer, be put under the Different Light and shine different time, can show specific figure of certain commodity or literal.
6. according to the method for claim 5, wherein used light source is daylight, incandescent light, daylight light and/or ultraviolet light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98102845 CN1078713C (en) | 1998-07-10 | 1998-07-10 | Silver-salt photosensitive anti-forge technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98102845 CN1078713C (en) | 1998-07-10 | 1998-07-10 | Silver-salt photosensitive anti-forge technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1213090A CN1213090A (en) | 1999-04-07 |
| CN1078713C true CN1078713C (en) | 2002-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98102845 Expired - Fee Related CN1078713C (en) | 1998-07-10 | 1998-07-10 | Silver-salt photosensitive anti-forge technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1078713C (en) |
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1998
- 1998-07-10 CN CN 98102845 patent/CN1078713C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1213090A (en) | 1999-04-07 |
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