CN112068410B - Direct-writing holographic miniature encryption method - Google Patents
Direct-writing holographic miniature encryption method Download PDFInfo
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- CN112068410B CN112068410B CN202011013542.4A CN202011013542A CN112068410B CN 112068410 B CN112068410 B CN 112068410B CN 202011013542 A CN202011013542 A CN 202011013542A CN 112068410 B CN112068410 B CN 112068410B
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 65
- 238000000576 coating method Methods 0.000 claims abstract description 65
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000003384 imaging method Methods 0.000 claims abstract description 20
- 238000007747 plating Methods 0.000 claims abstract description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000001681 protective effect Effects 0.000 claims abstract description 16
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- 239000000853 adhesive Substances 0.000 claims abstract description 9
- 230000001070 adhesive effect Effects 0.000 claims abstract description 9
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- 238000005323 electroforming Methods 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 31
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 26
- 239000002131 composite material Substances 0.000 claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 21
- 229910052723 transition metal Inorganic materials 0.000 claims description 21
- 150000003624 transition metals Chemical class 0.000 claims description 21
- 150000003220 pyrenes Chemical class 0.000 claims description 20
- 238000007774 anilox coating Methods 0.000 claims description 19
- 239000000919 ceramic Substances 0.000 claims description 19
- CMLFRMDBDNHMRA-UHFFFAOYSA-N 2h-1,2-benzoxazine Chemical compound C1=CC=C2C=CNOC2=C1 CMLFRMDBDNHMRA-UHFFFAOYSA-N 0.000 claims description 18
- 125000005462 imide group Chemical group 0.000 claims description 18
- 239000013078 crystal Substances 0.000 claims description 14
- 239000011259 mixed solution Substances 0.000 claims description 14
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- 238000002156 mixing Methods 0.000 claims description 7
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- 229910052909 inorganic silicate Inorganic materials 0.000 claims description 6
- 150000002910 rare earth metals Chemical class 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 4
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 4
- DHRLEVQXOMLTIM-UHFFFAOYSA-N phosphoric acid;trioxomolybdenum Chemical compound O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.OP(O)(O)=O DHRLEVQXOMLTIM-UHFFFAOYSA-N 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
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- 239000003513 alkali Substances 0.000 description 1
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/0005—Adaptation of holography to specific applications
- G03H1/0011—Adaptation of holography to specific applications for security or authentication
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Credit Cards Or The Like (AREA)
- Holo Graphy (AREA)
Abstract
The invention belongs to the technical field of package anti-counterfeiting, and particularly relates to a direct-writing holographic miniature encryption method, which has the technical key points that: s1, coating an optical/mechanical variable information layer on a base film; s2, coating protective ink; s3, forming an imaging layer on the protective printing ink, and pressing a holographic microstructure on the surface of the imaging layer; s4, vacuum aluminum plating is carried out to form a vacuum aluminum plated layer; s5, slitting according to the size requirement of the product; s6, adopting an electroforming nickel plate with miniature encryption to mold; s7, coating adhesive sticker; and S8, die cutting and slitting. The invention aims to provide a direct-writing holographic miniature encryption method, which has the advantages of difficult counterfeiting, convenient use and easy identification of an anti-counterfeiting mark through adding an optical/mechanical variable information layer, and has industrial value.
Description
Technical Field
The invention belongs to the technical field of package anti-counterfeiting, and particularly relates to a direct-writing holographic miniature encryption method.
Background
Laser holographic images are used as anti-counterfeiting marks due to the high manufacturing difficulty and high access threshold, and are widely applied to packages, certificates, stamps, cards and coins and the like. At present, the high-efficiency laser holographic image manufacturing method transfers a grain pattern with a certain specific shape from a metal master to a product to be imprinted in an imprinting mode. With the development of science and technology, the mobility of personnel, the driving of benefits and the lack of standardization of management, the holographic technology is gradually diffused, so that the anti-counterfeiting mark is true and false and is difficult to distinguish, the situation that the anti-counterfeiting mark cannot be anti-counterfeiting is caused, the legitimate benefits of a merchant are seriously infringed, and even the health and the life of a consumer are harmed. Therefore, an anti-counterfeiting product which is higher, difficult to forge, convenient to use and easy to identify is urgently needed.
In view of the defects of the existing anti-counterfeiting technology, the inventor develops a direct-write holographic miniature encryption method based on years of abundant experience and professional knowledge of the materials, and by matching with theoretical analysis and research and innovation, the direct-write holographic miniature encryption method has the advantages of being difficult to forge, convenient to use and easy to identify, and has industrial value.
Disclosure of Invention
The invention aims to provide a direct-writing holographic miniature encryption method, which has the advantages of difficult counterfeiting, convenient use and easy identification of an anti-counterfeiting mark through adding an optical/mechanical variable information layer, and has industrial value.
The technical purpose of the invention is realized by the following technical scheme:
the invention provides a direct-write holographic miniature encryption method, which comprises the following operation steps:
s1, coating an optical/mechanical variable information layer on a base film;
s2, coating protective ink;
s3, forming an imaging layer on the protective printing ink, and pressing a holographic microstructure on the surface of the imaging layer;
s4, vacuum aluminum plating is carried out to form a vacuum aluminum plated layer;
s5, slitting according to the size requirement of the product;
s6, adopting an electroforming nickel plate with miniature encryption to mold;
s7, coating adhesive sticker;
and S8, die cutting and slitting.
Further, the optically/mechanically variable information layer in step S1 includes the following components in parts by weight: 30-40 parts of printing ink, 20-30 parts of amphiphilic pyrene derivative materials, 5-8 parts of transition metal polyacid compounds and 5-8 parts of main chain type benzoxazine containing an imide structure.
Wherein the chemical structural formula of the amphiphilic pyrene derivative material is as follows:
the compound is green when the humidity is lower than 5 percent, is yellow when the humidity is 100 percent, is added into the optical/mechanical variable information layer, can obtain yellow information when water is sprayed on the optical/mechanical variable information layer, and can identify the authenticity when the yellow is converted into green after the water is evaporated; the transition metal polyacid compounds are combined together to form a transition metal polyacid-based composite film, and hydrogen bonds of the transition metal polyacid compounds are combined with the amphiphilic pyrene derivative material, so that charge transfer can occur between the transition metal polyacid compounds and the amphiphilic pyrene derivative under the irradiation of ultraviolet light, and the transition metal polyacid compounds are converted from white to dark blue; the refractive index difference between the main chain type benzoxazine containing the imide structure and the transition metal polyacid compound and the amphiphilic pyrene derivative material is large, when pressure is applied, the main chain type benzoxazine containing the imide structure is stretched to be 1.5 times of the length, the visible light transmittance is reduced from 90% to 10%, after the pressure is removed, the initial state can be recovered within 10s, the transmittance is recovered to 90%, and authenticity can be identified by the method.
Further, the vacuum aluminum plating layer comprises the following components: 20-30 parts of aluminum wire, 3-5 parts of inorganic silicate-based rare earth crystal material, 5-10 parts of magnetic crystal material and 10-20 parts of butterfly scale powder. The butterfly scale powder is used as the outermost coating, so that the chemical/mechanical variable information layer can be protected from being corroded by acid and alkali, the stripping capability can be improved through chitin in the butterfly scale powder, and the printing quality is guaranteed.
Further, the inorganic silicate-based rare earth crystal material is Li2SrSiO4、Li2BaSiO4Or Li2MgSiO4Any one of them. The addition of the inorganic silicate-based rare earth crystal material can form an excited state after absorbing visible light through the special spectral properties of rare earth elements, expand a light band and conduct light energy, and can improve the curing rate of the photosensitive adhesive in the imprinting process through the conduction of magnetic quanta when being used in combination with the magnetic crystal material; and the color change range of the light wave of the transition metal polyacid compound is expanded, so that the color change sensitivity of the transition metal polyacid compound is improved.
Further, the transition metal polyacid compound is WO doped with phosphomolybdic acid, hexatungstic acid or graphene oxide3/MoO3Any one of the composite powders.
The pyrene derivative has larger chemical activity and can realize charge transfer, and the pyrene derivative can form a charge transfer bridge with the transition metal polyacid compound, so that the three transition metal polyacid compounds are connected with the pyrene derivative through hydrogen bonds, and the color change process of the transition metal polyacid compound is completed.
Further, the operation method of step S1 is: adding 20-30 parts of amphiphilic pyrene derivative material and 5-8 parts of transition metal polyacid compound into a DMF (dimethyl formamide) solvent, uniformly mixing to form a mixed solution, coating the mixed solution on the base film to form a composite film with the thickness of 0.01-0.1 mu m, drying at room temperature, dissolving 5-8 parts of main chain type benzoxazine containing an imide structure in DMF, coating the composite film with the thickness of 0.01-0.1 mu m, drying at room temperature to form a film, and coating ink. The preparation method of the composite membrane is a drop-film method, and the composite membrane prepared by the method is more compact and more sensitive in color development. And the main chain type benzoxazine containing the imide structure is attached to the surface layer of the composite film, so that the main chain type benzoxazine containing the imide structure can be stretched under the action of pressure, and the purpose of identifying authenticity is realized due to the difference of refractive indexes and color change.
Further, in step S1, when the ink is coated, the anilox roller is a ceramic roller, the ink is transparent, and the dry coating amount is 0.2-0.25 g/m2And drying and curing.
The chemical structural formula of the main chain type benzoxazine containing the imide structure is as follows:
further, when the holographic mold pressing layer is coated in the step S3, a ceramic roller is adopted as the anilox roller, and the dry coating amount is 0.6-0.8 g/m2。
Further, when the vacuum aluminum plating is performed, the thickness of the vacuum aluminum plating layer is 10 to 14 nm.
Further, in step S3, pressing a holographic microstructure on the surface of the imaging layer, heating the plate roller to 180 to 200 ℃, and transferring the holographic microstructure on the plate roller onto the imaging layer with a pressure of 0.5 Pa.
In conclusion, the invention has the following beneficial effects:
the invention provides a direct-writing holographic miniature encryption method, which provides three methods for identifying authenticity: firstly, the color change of the amphiphilic pyrene derivative can be obtained by changing the humidity, and the authenticity can be identified by changing the humidity; secondly, charge transfer is generated between the transition metal polyacid compound and the amphiphilic pyrene derivative through ultraviolet illumination, so that the transition metal polyacid compound is subjected to color change to identify the authenticity, finally, the main chain type benzoxazine material containing the imide structure can be stretched through the pressure of external action to change the transmittance, the color change is formed through the refractive index difference between the Zhu face type benzoxazine material containing the imide structure and the transition metal polyacid compound, and the purpose of identifying the authenticity is achieved; the three methods are simple, effective, strong in reversibility and high in industrial value.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the detailed description of the embodiments, features and effects of the direct-write holographic miniature encryption method according to the present invention is provided below.
Example 1: a direct-write holographic miniature encryption method comprises the following operation steps: according to the weight portion, calculating the weight portion,
s1, coating an optical/mechanical variable information layer on a base film; adding 20-30 parts of amphiphilic pyrene derivative material and 5-8 parts of transition metal polyacid compound into a DMF (dimethyl formamide) solvent, uniformly mixing to form a mixed solution, coating the mixed solution on a base film to form a composite film with the thickness of 0.01-0.1 mu m, drying at room temperature, dissolving 5-8 parts of main chain type benzoxazine containing an imide structure in DMF, coating the composite film with the thickness of 0.01-0.1 mu m, drying at room temperature to form a film, and coating ink; the anilox roller is a ceramic roller, the printing ink is transparent, and the dry coating amount is 0.2-0.25 g/m2Drying and curing;
s2, coating protective ink, wherein a ceramic roller is adopted as an anilox roller, the ink is transparent, and the dry coating amount is 0.2-0.25 g/m2Drying and curing;
s3, forming an imaging layer on the protective printing ink, heating the plate roller to 180-200 ℃, and transferring the holographic microstructure on the plate roller to the imaging layer by using 0.5Pa pressure, wherein the anilox roller adopts a ceramic roller and a dry rollerThe coating amount is 0.6-0.8 g/m2；
S4, vacuum aluminum plating is carried out to form a vacuum aluminum plated layer, and 20-30 parts of aluminum wires, 3-5 parts of inorganic silicate-based rare earth crystal materials, 5-10 parts of magnetic crystal materials and 10-20 parts of butterfly scale powder are sublimated at high temperature and then sublimated to the thin film coated with the protective layer at low temperature in a vacuum state;
s5, slitting according to the size requirement of the product;
s6, adopting an electroforming nickel plate with miniature encryption to mold;
s7, coating adhesive sticker;
and S8, die cutting and slitting.
Example 2: a direct-writing holographic miniature encryption method comprises the following operation steps of:
s1, coating an optical/mechanical variable information layer on a base film; adding 20 parts of amphiphilic pyrene derivative material and 8 parts of phosphomolybdic acid into a DMF (dimethyl formamide) solvent, uniformly mixing to form a mixed solution, coating the mixed solution on a base film to form a composite film with the thickness of 0.01-0.1 mu m, drying at room temperature, dissolving 8 parts of main chain type benzoxazine containing an imide structure in DMF, coating the composite film with the thickness of 0.01-0.1 mu m, drying at room temperature to form a film, and coating ink; the anilox roller is a ceramic roller, the printing ink is transparent, and the dry coating amount is 0.2-0.25 g/m2Drying and curing;
s2, coating protective ink, wherein a ceramic roller is adopted as an anilox roller, the ink is transparent, and the dry coating amount is 0.2-0.25 g/m2Drying and curing;
s3, forming an imaging layer on the protective printing ink, heating the plate roller to 180-200 ℃, transferring the holographic microstructure on the plate roller to the imaging layer by using 0.5Pa pressure, wherein the anilox roller is a ceramic roller, and the dry coating amount is 0.6-0.8 g/m2；
S4, vacuum aluminum plating is carried out to form a vacuum aluminum plating layer, and 30 parts of aluminum wires and Li are added in a vacuum state2BaSiO45 parts of magnetic crystal material 10 parts and butterfly scale powder 20 parts, sublimating at high temperature and then sublimating at low temperature to the film coated with the protective layer;
s5, slitting according to the size requirement of the product;
s6, adopting an electroforming nickel plate with miniature encryption to mold;
s7, coating adhesive sticker;
and S8, die cutting and slitting.
Example 3: a direct-writing holographic miniature encryption method comprises the following operation steps of:
s1, coating an optical/mechanical variable information layer on a base film; adding 30 parts of amphiphilic pyrene derivative material and 8 parts of hexatungstic acid into a DMF (dimethyl formamide) solvent, uniformly mixing to form a mixed solution, coating the mixed solution on a base film to form a composite film with the thickness of 0.01-0.1 mu m, drying at room temperature, dissolving 5 parts of main chain type benzoxazine containing an imide structure in DMF, coating the composite film with the thickness of 0.01-0.1 mu m, drying at room temperature to form a film, and coating ink; the anilox roller is a ceramic roller, the printing ink is transparent, and the dry coating amount is 0.2-0.25 g/m2Drying and curing;
s2, coating protective ink, wherein a ceramic roller is adopted as an anilox roller, the ink is transparent, and the dry coating amount is 0.2-0.25 g/m2Drying and curing;
s3, forming an imaging layer on the protective printing ink, heating the plate roller to 180-200 ℃, transferring the holographic microstructure on the plate roller to the imaging layer by using 0.5Pa pressure, wherein the anilox roller is a ceramic roller, and the dry coating amount is 0.6-0.8 g/m2；
S4, vacuum aluminum plating is carried out to form a vacuum aluminum plating layer, and 20 parts of aluminum wires and Li are added in a vacuum state2SrSiO45 parts of magnetic crystal material and 10 parts of butterfly scale powder, sublimating at high temperature and then sublimating at low temperature to the film coated with the protective layer;
s5, slitting according to the size requirement of the product;
s6, adopting an electroforming nickel plate with miniature encryption to mold;
s7, coating adhesive sticker;
and S8, die cutting and slitting.
Example 4: a direct-writing holographic miniature encryption method comprises the following operation steps of:
s1, coating an optical/mechanical variable information layer on a base film; will be provided withAmphiphilic pyrene derivative material 25 parts and graphene oxide doped WO3/MoO3Adding 8 parts of composite powder into a DMF (dimethyl formamide) solvent, uniformly mixing to form a mixed solution, coating the mixed solution on a base film to form a composite film with the thickness of 0.01-0.1 mu m, drying at room temperature, dissolving 7 parts of main chain type benzoxazine containing an imide structure in DMF, coating the mixture on the composite film with the thickness of 0.01-0.1 mu m, drying at room temperature to form a film, and coating ink; the anilox roller is a ceramic roller, the printing ink is transparent, and the dry coating amount is 0.2-0.25 g/m2Drying and curing;
s2, coating protective ink, wherein a ceramic roller is adopted as an anilox roller, the ink is transparent, and the dry coating amount is 0.2-0.25 g/m2Drying and curing;
s3, forming an imaging layer on the protective printing ink, heating the plate roller to 180-200 ℃, transferring the holographic microstructure on the plate roller to the imaging layer by using 0.5Pa pressure, wherein the anilox roller is a ceramic roller, and the dry coating amount is 0.6-0.8 g/m2；
S4, vacuum aluminum plating is carried out to form a vacuum aluminum plating layer, and 20 parts of aluminum wires and Li are added in a vacuum state2SrSiO45 parts of magnetic crystal material and 10 parts of butterfly scale powder, sublimating at high temperature and then sublimating at low temperature to the film coated with the protective layer;
s5, slitting according to the size requirement of the product;
s6, adopting an electroforming nickel plate with miniature encryption to mold;
s7, coating adhesive sticker;
and S8, die cutting and slitting.
Example 5: a direct-writing holographic miniature encryption method comprises the following operation steps of:
s1, coating an optical/mechanical variable information layer on a base film; WO doped with 25 parts of amphiphilic pyrene derivative material and graphene oxide3/MoO3Adding 8 parts of composite powder into a DMF (dimethyl formamide) solvent, uniformly mixing to form a mixed solution, coating the mixed solution on a base film to form a composite film with the thickness of 0.01-0.1 mu m, drying at room temperature, dissolving 7 parts of main chain type benzoxazine containing an imide structure in DMF, coating the mixture on the composite film with the thickness of 001-0.1 mu m, drying at room temperature to form a film, and then coating ink; the anilox roller is a ceramic roller, the printing ink is transparent, and the dry coating amount is 0.2-0.25 g/m2Drying and curing;
s2, coating protective ink, wherein a ceramic roller is adopted as an anilox roller, the ink is transparent, and the dry coating amount is 0.2-0.25 g/m2Drying and curing;
s3, forming an imaging layer on the protective printing ink, heating the plate roller to 180-200 ℃, transferring the holographic microstructure on the plate roller to the imaging layer by using 0.5Pa pressure, wherein the anilox roller is a ceramic roller, and the dry coating amount is 0.6-0.8 g/m2；
S4, vacuum aluminum plating is carried out to form a vacuum aluminum plating layer, and 20 parts of aluminum wires and Li are added in a vacuum state2MgSiO45 parts of magnetic crystal material and 6 parts of butterfly scale powder, sublimating at high temperature and then sublimating at low temperature to the film coated with the protective layer;
s5, slitting according to the size requirement of the product;
s6, adopting an electroforming nickel plate with miniature encryption to mold;
s7, coating adhesive sticker;
and S8, die cutting and slitting.
And (3) carrying out a color change test on the anti-counterfeiting mark obtained in the embodiment 1-5, wherein the test method comprises the following steps:
1. at room temperature, the humidity is 30%, water of 40 ℃ is sprayed on the anti-counterfeiting mark obtained in the embodiment 1-5, and then the anti-counterfeiting mark is placed in an oven to be dried (the humidity is less than 5%), and color change is observed.
| Humidity | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| 40％ | Yellow green | Yellow green | Yellow green | Yellow green | Yellow green |
| 100％ | Yellow colour | Yellow colour | Yellow colour | Yellow colour | Yellow colour |
| ＜5％ | Green colour | Green colour | Green colour | Green colour | Green colour |
2. And (3) placing the anti-counterfeiting mark obtained in the embodiment 1-5 under ultraviolet light with the wavelength of 420nm for irradiating for 10min, removing the ultraviolet light, standing for 30min, and observing the color change.
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Irradiation with 420nm UV lamp | Dark blue-green | Dark blue-green | Dark blue-green | Dark blue-green | Dark blue-green |
| Removing the ultraviolet lamp for 10min | Blue green color | Blue green color | Blue green color | Blue green color | Blue green color |
| Removing the ultraviolet lamp for 20min | Light green | Light green | Light green | Light green | Light green |
| Removing the ultraviolet lamp for 30min | Yellow colour | Yellow colour | Yellow colour | Yellow colour | Yellow colour |
3. And pressing the anti-counterfeiting mark obtained in the embodiment 1-5 by adopting 5Pa pressure, removing the pressure after 1min, and observing the color change.
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Pressure 5Pa | Light green | Light green | Light green | Light green | Light green |
| After the pressure is removed for 10s | Light yellow | Light yellow | Light yellow | Light yellow | Light yellow |
When pressure is applied, the main chain type benzoxazine resin containing the imide structure extends, the light transmittance is improved, the optical information material absorbs more ultraviolet light in visible light, the color is changed from white to light blue, and the yellow of the amphiphilic pyrene derivative jointly colors to generate green; when the pressure is removed, the main chain type benzoxazine resin containing the imide structure shrinks back to the original shape, the refractive index is changed, the light transmission is reduced, the optical information material is changed from light blue to white, the blue background color is removed, and the light yellow of the amphiphilic pyrene derivative is reappeared.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A direct-write holographic miniature encryption method is characterized by comprising the following operation steps:
s1. coating an optically/mechanically variable information layer on the base film;
s2, coating protective ink;
s3, forming an imaging layer on the protective ink, and pressing a holographic microstructure on the surface of the imaging layer;
s4, vacuum aluminum plating is carried out to form a vacuum aluminum plating layer;
s5, slitting according to the size requirement of the product;
s6, adopting an electroforming nickel plate with miniature encryption to mold;
s7, coating adhesive sticker;
s8, die cutting and slitting; the optical/mechanical variable information layer in step S1 includes the following components in parts by weight: 30-40 parts of printing ink, 20-30 parts of amphiphilic pyrene derivative materials, 5-8 parts of transition metal polyacid compounds and 5-8 parts of main chain type benzoxazine containing an imide structure.
2. The direct-write holographic miniature encryption method of claim 1, wherein said vacuum aluminum plating layer comprises the following components: 20-30 parts of aluminum wire, 3-5 parts of inorganic silicate-based rare earth crystal material, 5-10 parts of magnetic crystal material and 10-20 parts of butterfly scale powder.
3. The direct-write holographic miniature encryption method of claim 2, wherein said inorganic silicate-based rare earth crystal material is Li2SrSiO4、Li2BaSiO4Or Li2MgSiO4Any one of them.
4. The direct-write holographic stereolithography method according to claim 1, wherein said transition metal polyacid compound is WO doped with phosphomolybdic acid, hexatungstic acid or graphene oxide3/MoO3Any one of the composite powders.
5. The direct-write holographic miniature encryption method according to claim 1, wherein said operation method of step S1 is: adding 20-30 parts of amphiphilic pyrene derivative material and 5-8 parts of transition metal polyacid compound into a DMF (dimethyl formamide) solvent, uniformly mixing to form a mixed solution, coating the mixed solution on the base film to form a composite film with the thickness of 0.01-0.1 mu m, drying at room temperature, dissolving 5-8 parts of main chain type benzoxazine containing an imide structure in DMF, coating the composite film on the composite film with the thickness of 0.01-0.1 mu m, drying at room temperature to form a film, and coating ink.
6. The direct-write holographic miniature encryption method according to claim 5, wherein in said step S1, when said ink is applied, a ceramic roller is used as an anilox roller, the ink is transparent, and the dry coating amount is 0.2-0.25 g/m2And drying and curing.
7. The method of claim 1, wherein a ceramic roller is used as the anilox roller in the step S3 of applying the image layer, and the dry coating amount is 0.6-0.8 g/m2。
8. The direct-write holographic miniature encryption method as claimed in claim 1, wherein the thickness of the vacuum aluminum plating layer is 10-14 nm when the vacuum aluminum plating is performed.
9. The direct-write holographic miniature encryption method according to claim 1, wherein in step S3, the holographic microstructure is pressed on the surface of the imaging layer, the plate roll is heated to 180-200 ℃ and the holographic microstructure on the plate roll is transferred onto the imaging layer with a pressure of 0.5 Pa.
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| US20050179253A1 (en) * | 2004-02-18 | 2005-08-18 | Amagic Holographics, Inc. | Method of attaching hologram films to printed matter |
| CN101870218A (en) * | 2005-01-14 | 2010-10-27 | 卡伯特公司 | Anti-counterfeiting characteristic spare, its use and manufacture method thereof |
| CN103325301A (en) * | 2013-05-03 | 2013-09-25 | 武汉华工图像技术开发有限公司 | Holographic miniature encrypting and positioning optics rule-changeable exposing and anti-counterfeiting mark and preparation technology thereof |
| CN107033189B (en) * | 2017-05-04 | 2019-06-25 | 南京工业大学 | Platinum (II) complex and preparation method and application thereof |
| CN110525103A (en) * | 2019-08-21 | 2019-12-03 | 杨志勇 | Exempt from print protection gloss oil holographic false proof positioning directly boiling hot gilding film and preparation method thereof |
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| WO2001005600A1 (en) * | 1999-07-16 | 2001-01-25 | American Coating Technology, Inc. | Heat-shrinkable ink-jet recording material |
| WO2007042177A1 (en) * | 2005-10-11 | 2007-04-19 | Smart Holograms Ltd. | Multiple security means comprising an interactive security element |
| WO2012028835A1 (en) * | 2010-09-03 | 2012-03-08 | De Montfort University | Multi-spectral holographic security marker, method for its manufacture and holographic security system |
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