CN103242708A - Near-infrared absorption printing ink for anti-fake identification - Google Patents
Near-infrared absorption printing ink for anti-fake identification Download PDFInfo
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Abstract
The invention relates to near-infrared absorption printing ink for anti-fake identification. The printing ink contains a special infrared absorption material; the special infrared absorption material is designed to have average reflectivity less than 20% within a broad-band near-infrared range of 850nm-1250nm; the reflectivity is converted to absorption rate reaching 80% or more, so that excellent infrared absorption performances are shown. Especially within a band range of 1100nm-1200nm, the infrared absorption material has the highest infrared absorption efficiency; and specifically, the material has a highest infrared absorption peak value within infrared spectrum of 1100nm-1200nm of the material. The peak value is compared with the absorption value in other infrared regions, so that the near-infrared absorption printing ink can be further used for anti-fake identification by virtue of mathematical calculation.
Description
Technical field
The present invention relates to a kind of for anti-counterfeit recognition the near infrared absorption material and by the near infrared absorption printing-ink of this material preparation.
Background technology
In existing anti-forgery ink system, the application of fluoresent printing ink, temperature sensitive ink, infrared excitation luminous printing ink is very universal.Near infrared absorption printing ink has also obtained popularization as a kind of false proof means in recent years.Particularly near infrared absorption material the application in false proof field of scope between 700 to 2000nm is well known to those skilled in the art.Especially in all kinds of currency, certificate, magnetic card, Valued Securities, the near-infrared absorption anti-counterfeiting technology that is used for anti-counterfeit recognition has obtained widespread use.
Analyze from the infrared absorption performance, the absorption peak of most known near infrared absorption materials is in the 700-1100nm infrared band at present, and relevant infrared absorbing material is applied in the patents such as WO03038001, CN1714126A, CN101237991 and has obtained description.Because the infrared absorbing material of maximum absorption band before 1100nm is more, in fact the specific wavelength near infrared absorption material case of original infrared anti-false feature of counterfeiting currency in the counterfeit money of a plurality of national currencies, occurred adopting, and these infra-red materials that are used for forging are Infrared dyes or the pigment of maximum absorption peak before 1100nm.Therefore, if also the infrared signature peak value in a certain wavelength band before 1100nm carries out the contrast of absorptive character with this peak value and same material to prepare the infra-red material that the strongest infrared absorption peak value is arranged after the 1100nm wave band, can effectively avoid adopting one or more commercially available infrared absorbing materials to the imitation of characteristic infrared absorption, highlight the uniqueness of infrared absorbing material, and further strengthen the technical difficulty of anti-counterfeit recognition, effectively the crime prevention molecule adopts general infra-red material to the forgery of safety product.
Infra-red material is prepared infrared absorption printing ink as a kind of pigment and ink adhesive by physical mixed become a kind of disclosed technology.At present, there has been several different methods infrared absorbing material can be made into printing, flexographic ink, silk-screen ink, flexographic ink or ink for ink-jet print.Wherein, carved gravure printing and silk screen printing are outstanding carriers of performance infrared absorption effect.Print the field at currency or security, all infrared absorbing material is made into printing all the time and adopts the carved gravure typography to be printed as the infrared absorption pattern and then to reach the false proof purpose of machine-readable identification.As far back as distribution in 2002 Euro in just adopted this infrared engraving intaglio printing ink as the anti-counterfeit recognition means.But because gravure is general meticulousr, therefore for the lower gravure pattern of line density, its infrared identification is higher to the detector accuracy requirement.Because silk screen printing can give effective printing area of printed patterns the best, and silk-screen ink can use minimum material addition to make printing ink embody best infrared absorption effect.Therefore, be best suited for being used in the machine-readable anti-false of currency, field of securities for the near infrared absorption screen printing ink of anti-counterfeit recognition.
Existing infrared absorption printing divides from the structure of the infrared absorbing material selected for use, mainly contains inorganic infrared absorbing material and organic infrared absorbing material.Wherein organic infrared absorbing material is various in style, Chinese patent CN1372166 discloses a kind of negative image recording material for the hot mode exposure system, wherein it has comprised a kind of infrared absorbing agents with substituent cyanine dyes, this dyestuff substituting group contains nucleidic mass and is at least 28 atom such as halogen atom, perhaps substituting group contains non-share electron pair such as carbonyl etc., is typical organic infrared absorbing dye.Because the chemical property of most of organic infrared absorbing material is stable inadequately, so it is not suitable for the Application Areas that patience is had relatively high expectations, and particularly for the printing in high-end false proof field, it uses organic infrared absorbing material to exist the risk of less stable.
US Patent No. 6410613 discloses a kind of infrared absorption component.This is a class organic coordination compound, adopts cupric ion as the metal ion in the title complex, and to reach raising to the assimilation effect of near-infrared wavelength, its product color is light blue.Because this product has certain water-soluble, therefore be not suitable in the product that printing ink patience is had relatively high expectations, as security, banknote etc.
The Japanese Patent spy opens JP2001-97984 and discloses and a kind ofly do not absorb in visible wavelength range, but the material of strong absorption is arranged at near-infrared band.It is mainly contained the near infrared absorption resin Composition of phosphate radical by copper hydroxide and a class.This resinoid has narrow wave band infrared absorption characteristics, and the strongest absorption peak is about 800nm, and it equally also exists the defective of product patience.
Simultaneously, related to a kind of narrow wave band near infrared absorption material (IR-taggant) among the international monopoly WO03038001 of SICPA company application, it is the phthalocyanine based compound, and maximum absorption wavelength is about 750nm.
Publication number is that the Chinese patent of CN1714126A discloses a series of infrared absorbing dye.This class dyestuff maximum absorption peak and has good thermostability between 1000-1100nm, long-time use can not lose infrared receptivity, can be applied in the higher ink system of stability requirement.
Can see that most of organic infrared absorbing material absorbing wavelength and have the infrared absorption characteristics of narrow wave band between 700-1100nm.Therefore, for the tamperer, adopt one or more commercially available organic infrared absorbing materials can easier simulate the feature of infrared absorption printing ink.
In CN1690135A, disclose a kind of anti-forgery ink with infrared absorbent powder of high-absorbable light color as far back as inventor of the present invention in 2004, comprised the inorganic infrared absorbent powder that a class has the near infrared absorption performance in the printing ink.Wherein having in the relevant components of a class infrared absorbing material to mainly include Cu element, P element and oxygen element, is that a class is based on the infrared absorbing material of copper phosphoric acid salt.This class infra-red material has average ir-absorbance more than 80% at the 750-1250nm infrared band, and has reflectivity more than 80% at the 400-700nm visible light wave range, have very unique wide band infrared anti-false application performance, this phosphatic infrared absorption is that the performance by cupric ion decides.
But, be not that all contain the phosphatic infrared absorbing material of copper and all can reach the desired material in the 1100-1200nm wavelength band of the present invention this anti-counterfeiting characteristic requirement of the strongest infrared absorption efficient is arranged.As Liu Huimin, do the good fortune dawn the paper that " luminous with show " delivered " mix the spectral investigation of copper phosphoric acid salt and fluorphosphate glass " though in clearly put down in writing the existence of mixing the near infrared absorption explanation of copper phosphoric acid salt Cu2+ at the 31st page, absorption band belongs to the 2Eg → 2T2g transition of d9 ion.Delivering relevant spectrogram from paper analyzes, wherein mix the phosphatic infrared absorption peak value of copper between the 10000-12000 wave number, be between the infrared 830-1000nm wave band, though this infrared absorption also has than wide band, very easily reached by the combination of the organic infra-red material of other multiple commercially available narrow wave bands by the offender but this wide band is infrared, on Application in Anti-counterfeiting, had very big risk.
Summary of the invention
Technical problem solved by the invention provides a kind of near infrared absorption printing-ink for anti-counterfeit recognition.Contain a kind of special infrared absorbing material in the described printing ink.The reflectivity that it is designed to have in 850-1250nm wide band near infrared range on average less than 20% is converted into specific absorption and can reaches more than 80%, shows excellent infrared absorption performance.Particularly in the 1100-1200nm wavelength band, material has the strongest near infrared absorption efficient, is embodied in the near infrared spectral range of 700-2000nm, and this material has a near infrared absorption peak value the strongest to be between the 1100-1200nm.The absorption value of this peak value and other near infrared region is compared, can be further used for anti-counterfeit recognition by mathematical computations.
Infrared absorbing material in the printing ink of the present invention has the ir-absorbance more than 80% in 850-1250nm wide band near infrared range, and at 1100-1200nm a maximum infrared absorption peak is arranged.Described infrared absorbing material is the mineral compound that mantoquita is directly obtained by simple chemical reaction in for acidic solution between the 1-5 in the pH value as chemical feedstocks.Contain a certain amount of carbonate in order to guarantee to react in the compound of back, directly selecting phosphoric acid mantoquita or carbonic acid mantoquita in this reaction for use is that raw material participation reaction is the scheme that can preferentially select.The infrared absorbing material that obtains by operational path of the present invention also is the another kind of compound mantoquita that directly prepares.Must contain P and two kinds of elements of C in the part of the inorganic infrared absorbent powder that end reaction obtains at least, be embodied in and contain a certain amount of phosphate radical and carbonate in the compound mantoquita.The effect of copper only is to have given infrared absorbing material at wideer infrared absorption wave band of 850nm-1250nm in the compound, and the position of concrete infrared peak value is then decided by the phosphate radical in the compound and carbonate part and cupric ion synergy.For infrared absorbing material of the present invention, determined peak type and the peak value of infrared absorption peak in the material as phosphate radical, the carbonate content of part.Material of the present invention is calcined slough part water after, by the coherent element analysis, the contriver thinks that the mineral compound of carbon of the elementary composition phosphorus of amounting to into copper that mass percent is 10%-65%, 1%-40% of concrete chemistry, 0.5%-20% can satisfy the desired reflectivity that has on average less than 20% among the present invention in 850-1250nm wide band near infrared range, and in the 1100-1200nm wavelength band, material has the strongest this requirement of infrared absorption peak value.
It should be noted that, the mantoquita that the present invention mentions is directly to obtain by the chemical reaction under the certain condition by single raw material, phosphate radical and carbonate that reaction produces have mutual synergy, even therefore with commercially available carbonic acid mantoquita and phosphoric acid mantoquita simply with stoichiometric ratio physical mixed in addition, also can't embody the infrared property of the excellence that material of the present invention shows.
A kind of possible concrete preparation technology of the infrared absorbing material among the present invention forms the water-based dispersion soln for single mantoquita is scattered in the water.Drip the acidic solution that contains phosphate radical under 35 ℃～65 ℃ temperature of reaction in solution, the control pH value is between 1-5.After dropping, in 75 ℃～110 ℃ solution is proceeded the high-speed stirring reaction, the reaction times is 0.5～6 hour.Reaction product after filtration, directly obtain inorganic infrared absorbent powder after the washing, dry, calcining.
The processing that also can further organise of the inorganic infrared absorbent powder material that aforesaid method makes, its surface makes material have better dispersiveness in binder.Selected surface treatment agent comprises: titanate coupling agent, sodium stearate, acrylic resin, resol, urea-formaldehyde resin, polyvinylpyrrolidone a kind of.
Infrared absorbing material of the present invention can be used as a kind of pigment and ink adhesive and prepares infrared absorption printing ink by physical mixed.At present, there has been several different methods infrared absorbing material can be made into printing, flexographic ink, silk-screen ink, flexographic ink or ink for ink-jet print.But, infrared absorbing material of the present invention, most preferably be used for making the infrared absorption screen printing ink, screen printing ink in particular for currency or security printing field, effective printing area that it can give printed patterns the best demonstrates fully singularity and the uniqueness of infrared absorbing material of the present invention on absorption bands.Be suitable for use in most the machine-readable anti-false of currency, field of securities.
Near infrared absorption printing-ink of the present invention, can be used for silk screen printing or carved gravure printing, when being used for engraving and printing, if when being used for the bigger carved gravure printed patterns of line density, the content of described infrared absorbing material in printing ink is preferably mass percent more than 40%, and anti-counterfeit printing effect preferably can be provided.When being used for silk screen printing, the content of described infrared absorbing material in printing ink is that mass percent gets final product more than 3%.Screen printing ink preferably contains the infrared absorbing material of 3-19%, the binder of 5-35%, stopping composition and pigment, the wax of 0.5-10%, the tensio-active agent of 0.1-2%, the siccative of 1-3% and the solvent of 1-25% of 5-40%.For the printing of currency, security, consider that from red absorption peak contrast effect the content of infrared absorbing material is should be more than 3%.In the ink formulations design, for guaranteeing ratio of infrared absorption intensity, can consider the addition of infra-red material is increased to 19% in the less position of some pattern plane.For a person skilled in the art, what of addition are only influential to the absorption intensity of printing ink, and to the final not influence of absorption peak position of printing ink.Under the prerequisite that does not influence ink performance, can identify the requirement of the ratio of infrared absorption intensity that will reach according to reality, the design addition of infra-red material in printing ink comprises solid part summation of infrared absorbing material, stopping composition and pigment in theory even can reach more than 30% in the printing-ink.
In addition, it is the main body that determines the ink printing performance that binder is used in the printshop, can comprise the Synolac printing ink, resol oil, acrylic resin oil, polyvinyl butyral urea formaldehyde of any viscosity etc.By the resin of different performance is allocated, those skilled in the art can obtain the binder of different viscosity.
Pigment and stopping composition also are that printing ink is needed, and pigment can be for the organic or inorganic pigment of random color, as permanent bordeaux, permanent yellow, phthalocyanine blue, titanium white etc.; It should be noted that if in ink formulations, used too much titanium dioxide pigment, can reduce the ratio of infrared absorption intensity of printing ink, and then influence the anti-counterfeit recognition effect.For this reason, can improve the ability of printing ink anti-counterfeit recognition by the method that increases infrared absorbing material according to a certain percentage.
Stopping composition comprises calcium carbonate, silicon-dioxide, wilkinite, barium sulfate etc.;
Wax can be polyethylene wax, tetrafluoroethylene wax, oxidized polyethlene wax;
Tensio-active agent can be anion surfactant, nonionic surface active agent;
Solvent can be for Dormant oils, kerosene, have the boiling point organic solvent of certain boiling characteristics.
Near infrared absorption printing-ink of the present invention is preferred for secure file, for example the production of currency, certificate etc.Further, infrared absorbing material of the present invention can be in same printing ink with prior art in the effective combination of disclosed other various types of infrared absorbing materials, need carry out calculation of correlation again in conjunction with the characteristic infrared absorption ratio of back 1100-1200nm peak value and other position.Printing-ink among the present invention can be used as independently that anti-counterfeiting characteristic prints, and perhaps unites use with the non-infrared absorption printing ink with identical visible hue, absorbs pattern thereby form the infrared pairing of hiding.In addition, infrared absorption printing ink of the present invention can be united use with the infrared oil suction China ink of other type on identical file, to increase the disguise of machine-readable identification.
In order to be distinguished with the infrared absorbing material that is forged easily, infra-red material of the present invention is designed to have the reflectivity that has on average less than 20% in 850-1250nm wide band near infrared range, be converted into specific absorption and can reach more than 80%, show excellent more broadband infrared absorption performance.Simultaneously, be combined in the 1100-1200nm near-infrared band scope, material has the strongest this feature of infrared absorption efficient, can effectively itself and existing infrared absorbing material be distinguished.Further the peak value of the specific ir-absorbance in the 1100-1200nm wavelength band and the specific ir-absorbance of 800-1100nm region of ultra-red are compared, can obtain the ratio of a relative absorption value by mathematical computations, this ratio is that other infrared absorbing materials are beyond one's reach between 1.05-1.3, can be used for further anti-counterfeit recognition.A kind of feasible comparative approach is that the absorptance values with 1150nm wave band and 850nm wave band compares, and obtains the ratio (1150nm/850nm) of relative absorption value.Silk screen printing can give effective printing area of printed patterns the best, and pattern can be large-area unanimous vote face pattern after the silk screen printing, and the printing ink rete is thicker, uses most economical material addition can make printing ink embody best ratio of infrared absorption intensity.Therefore, this class pattern is very suitable for the identification of ratio (1150nm/850nm) this peak value ratio between 1.05-1.3 of relative absorption value.For the bigger carved gravure printed patterns of partial line rod density, could embody faint contrast effect when the addition of this material in printing ink is above greater than 40%.The accessibility that adopts the silk-screen ink printing is that other any mode of printing institute is inaccessiable.
The present invention has further overcome the deficiency in the existing infrared absorption technology, by to the existing improvement that contains the inorganic copper infra-red material, provides a kind of and has satisfied the infrared absorbing material of above-mentioned requirements and be made into currency or the needed printing-ink of certificate.
The present invention is on the material foundation of CN1690135A patent application, further found a class formation material, it is particularly suitable as employed infrared absorbing material in the printing, satisfies described requirement and has overcome prior art does not have the strongest infrared absorption efficient near infrared 1100-1200nm wave band shortcoming.
Now by embodiment the printing-ink of infrared absorbing material of the present invention and making thereof is described further, but these embodiment do not have any restriction to scope of the present invention.
Embodiment
For further specifying the present invention, specify with the following Examples:
Embodiment 1
The infrared absorbing material synthesis technique:
Take by weighing 89g copper carbonate and 10g ytterbium nitrate in reactor, add deionized water, under certain temperature, carry out dispersed with stirring, form the water-based dispersion soln.Be that introversive this solution splashed into the 50% biphosphate ammonia solution of 50g and the 85% phosphoric acid hydrogen ammonia solution of 10g in 15 minutes under 500 rev/mins the condition at 55 ℃, stir speed (S.S.).After dropwising, insulated and stirred reaction 30 minutes, being warming up to the water temperature again is 95 ℃, is incubated to stop after 4 hours stirring.The solid product that reaction is generated repeatedly washs, separates, and 105 ℃ of oven dry 2 hours, high-temperature calcination 3 hours namely get required inorganic infrared absorbing material.Through the power spectrum test, the elementary composition mass percent of amounting to into of materials chemistry is 39% copper, 17% phosphorus, 9% carbon, 0.3% ytterbium.
Embodiment 2
The infrared absorbing material synthesis technique:
Take by weighing the 97g copper carbonate in reactor, add deionized water, under certain temperature, carry out dispersed with stirring, form the water-based dispersion soln.Be under 500 rev/mins the condition, successively to splash into the 30% phosphoric acid hydrogen ammonia of 15g and 85% phosphoric acid solution of 25g to this solution at 45 ℃, stir speed (S.S.), be incubated the 50% biphosphate ammonia solution that splashes into 10g after 100 minutes again.After dropwising, insulated and stirred reaction 30 minutes, being warming up to the water temperature after the sealing pressurization again is 115 ℃, is incubated to stop after 30 minutes stirring.The solid product that reaction is generated repeatedly washs, separates, and 105 ℃ of oven dry 2 hours, high-temperature calcination 3 hours namely get required inorganic infrared absorbing material.Through the power spectrum test, the elementary composition mass percent of amounting to into of materials chemistry is 35.5% copper, 19.2% phosphorus, 10.7% carbon.
Embodiment 3
The infrared absorbing material synthesis technique:
Take by weighing 97g copper carbonate and 8g neodymium phosphate in reactor in reactor, add deionized water, under certain temperature, carry out dispersed with stirring, form the water-based dispersion soln.Be that introversive this solution splashed into the 30% phosphoric acid hydrogen ammonia of 30g in 15 minutes, was incubated 85% phosphoric acid solution that splashes into 95g after 60 minutes again under 600 rev/mins the condition at 55 ℃, stir speed (S.S.).After dropwising, insulated and stirred reaction 60 minutes, being warming up to the water temperature again is 85 ℃, is incubated to stop after 120 minutes stirring.The solid product washing that will reaction generates, separate, 105 ℃ of oven dry 2 hours, high-temperature calcination 3 hours namely get required inorganic infrared absorbing material.Through the power spectrum test, the elementary composition mass percent of amounting to into of materials chemistry is 40.1% copper, 27.4% phosphorus, 2.3% carbon.
Embodiment 4
The infrared absorbing material synthesis technique:
Take by weighing the 75g cupric pyrophosphate in reactor, add deionized water, under certain temperature, carry out dispersed with stirring, form the water-based dispersion soln.Be that introversive this solution splashed into 50% ammoniacal liquor of 30g in 15 minutes, be incubated 85% sodium carbonate solution and 40 that successively splashes into 120g after 30 minutes again and restrained 85% phosphoric acid under 600 rev/mins the condition at 35 ℃, stir speed (S.S.).After dropwising, insulated and stirred reaction 60 minutes, being warming up to the water temperature after the sealing pressurization again is 115 ℃, is incubated to stop after 30 minutes stirring.The solid product washing that will reaction generates, separate, 105 ℃ of oven dry 2 hours, high-temperature calcination 3 hours namely get required inorganic infrared absorbing material.Through the power spectrum test, the elementary composition mass percent of amounting to into of materials chemistry is 39.1% copper, 19.8% phosphorus, 14.3% carbon.
Embodiment 5
The infrared absorbing material process of surface treatment:
Get 200 gram embodiment 1 gained inorganic powders and be dispersed in the 1000ml acetone that is dissolved with 3% sodium stearate, under 55 ℃ of temperature, 1000 rev/mins the condition of stir speed (S.S.), carried out stirring reaction 30 minutes.Question response finishes back elimination acetone, and 105 ℃ of dryings obtain through sodium stearate surface-treated infrared absorbent powder.
Embodiment 6
Red infrared absorption screen printing ink:
Preparation technology is: the material that is weighed into aforementioned proportion in charging basket, adopt dispersion machine pre-mixing 30 minutes, then the mixture in the charging basket is ground in sand mill, 100 eye mesh screens filter and are infrared absorption silk screen finished product printing ink after the back product reaches silk-screen ink utilisation technology index after testing.
Embodiment 7
UV solidifies the preparation of blue infrared absorption screen printing ink:
In charging basket, be weighed into the material of aforementioned proportion, adopt dispersion machine pre-mixing 30 minutes, then the mixture in the charging basket is ground in sand mill, 100 eye mesh screens filter the back product and reach after testing and be UV after the silk-screen ink utilisation technology index and solidify blue infrared absorption silk screen finished product printing ink.
Because blue phthalocyanine blue pigment itself has characteristic infrared absorption, after preparation printing ink, corresponding infrared absorption peak value ratio need be recomputated for this reason.
Embodiment 8
Colourless infrared absorption screen printing ink:
Preparation technology is: the material that is weighed into aforementioned proportion in charging basket, adopt dispersion machine pre-mixing 30 minutes, then the mixture in the charging basket is ground in sand mill, 100 eye mesh screens filter and are infrared absorption silk screen finished product printing ink after the back product reaches silk-screen ink utilisation technology index after testing.
Embodiment 9
Colourless infrared absorption screen printing ink:
Preparation technology is: the material that is weighed into aforementioned proportion in charging basket, adopt dispersion machine pre-mixing 30 minutes, then the mixture in the charging basket is ground in sand mill, 100 eye mesh screens filter and are infrared absorption silk screen finished product printing ink after the back product reaches silk-screen ink utilisation technology index after testing.The printing ink that the infrared absorbent powder of employing embodiment 5 makes has stability preferably, can be difficult for precipitation, layering through long storage.
Above-described embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that the common engineering technical personnel in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (10)
1. near infrared absorption printing-ink that is used for anti-counterfeit recognition, it is characterized in that: contain infrared absorbing material in the described near infrared absorption printing-ink, described infrared absorbing material has average ir-absorbance more than 80% in 850-1250nm wide band near infrared range, and at 1100-1200nm a near ir absorption peaks the strongest is arranged.
2. near infrared absorption printing-ink according to claim 1 is characterized in that: contain cupric ion, phosphate radical and carbonate in the described infrared absorbing material; The position of the strongest near infrared absorption peak value of described infrared absorbing material is decided by wherein phosphate radical and the content of carbonate part and cupric ion.
3. near infrared absorption printing-ink according to claim 1 is characterized in that: contain the copper that mass percent is 10%-65%, the phosphorus of 1%-40% and the carbon of 0.5%-20% in the described infrared absorbing material.
4. near infrared absorption printing-ink according to claim 3, it is characterized in that: described infrared absorbing material is the mineral compound that mantoquita is directly obtained by chemical reaction in acidic solution as chemical feedstocks, be specially and single mantoquita be scattered in the water formation water-based dispersion soln; Drip the acidic solution that contains phosphate radical under 35 ℃～65 ℃ temperature of reaction in solution, control pH value is between 1-5; After dropping, in 75 ℃～110 ℃ solution is proceeded the high-speed stirring reaction, the reaction times is 0.5～6 hour; Answer product after filtration, directly obtain inorganic infrared absorbent powder after the washing, dry, calcining.
5. near infrared absorption printing-ink according to claim 1, it is characterized in that: described near infrared absorption printing-ink is the printing ink for silk screen printing.
6. near infrared absorption printing-ink according to claim 1, it is characterized in that: described near infrared absorption printing-ink is the printing ink during for the bigger carved gravure printed patterns of line density, and the content of described infrared absorbing material this moment in printing ink is that mass percent is more than 40%.
7. near infrared absorption printing-ink according to claim 5, it is characterized in that: the content of described infrared absorbing material in printing ink is that mass percent is more than 3%.
8. near infrared absorption printing-ink according to claim 7 is characterized in that: wherein contain the infrared absorbing material of mass percent 3-19%, the binder of 5-35%, stopping composition and pigment, the wax of 0.5-10%, the tensio-active agent of 0.1-2%, the siccative of 1-3% and the solvent of 1-25% of 5-40%.
9. near infrared absorption printing-ink according to claim 8, it is characterized in that: described binder comprises Synolac printing ink, resol oil, acrylic resin oil, the polyvinyl butyral urea formaldehyde of any viscosity.
10. each described near infrared absorption printing-ink of claim 1-9 is for the preparation of the secure file of need anti-counterfeit recognition.
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| IT201900005354A1 (en) * | 2019-04-08 | 2020-10-08 | Epta Inks S P A | Anti-counterfeiting security ink absorbing radiation in the part of the electromagnetic spectrum from 700nm to 1100nm |
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| CN105733355A (en) * | 2016-01-19 | 2016-07-06 | 惠州德斯坤实业有限公司 | Infrared absorption ink and bank card |
| CN107418302A (en) * | 2016-05-24 | 2017-12-01 | 中钞油墨有限公司 | Spirit soluble dyestuff type Antiforge infrared ink and its manufacture method |
| CN107418302B (en) * | 2016-05-24 | 2020-12-29 | 中钞油墨有限公司 | Alcohol-soluble dye type infrared anti-counterfeiting ink and manufacturing method thereof |
| CN106909955A (en) * | 2017-02-22 | 2017-06-30 | 上海交通大学 | A kind of method for anti-counterfeit based on infrared external reflection |
| CN108267415A (en) * | 2018-01-03 | 2018-07-10 | 苏州市明大高分子科技材料有限公司 | The label of radiation-hardenable composition based on infrared spectrum and recognition methods |
| CN110218485A (en) * | 2019-07-25 | 2019-09-10 | 李兴宇 | A kind of infrared absorption anti-forgery ink |
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| CN103242708B (en) | 2015-07-22 |
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Address after: 200063 158 Cao Yang Road, Shanghai Patentee after: SHANGHAI BANKNOTE PRINTING Co.,Ltd. Patentee after: China Banknote Printing and Minting Group Co.,Ltd. Address before: 200063 158 Cao Yang Road, Shanghai Patentee before: SHANGHAI BANKNOTE PRINTING Co.,Ltd. Patentee before: CHINA BANKNOTE PRINTING AND MINTING Corp. |
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