CN111098617A - Latent image embossing anti-counterfeiting structure and preparation process thereof - Google Patents

Latent image embossing anti-counterfeiting structure and preparation process thereof Download PDF

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Publication number
CN111098617A
CN111098617A CN202010019993.2A CN202010019993A CN111098617A CN 111098617 A CN111098617 A CN 111098617A CN 202010019993 A CN202010019993 A CN 202010019993A CN 111098617 A CN111098617 A CN 111098617A
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China
Prior art keywords
parts
latent image
convex
counterfeiting
ink
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CN202010019993.2A
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Chinese (zh)
Inventor
刘念
鄢洁莹
伍皎洁
吴胜军
尹胜超
茹意
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Wuhan Hongjinlong Printing Co Ltd
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Wuhan Hongjinlong Printing Co Ltd
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Priority to CN202010019993.2A priority Critical patent/CN111098617A/en
Publication of CN111098617A publication Critical patent/CN111098617A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14Security printing
    • B41M3/148Transitory images, i.e. images only visible from certain viewing angles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00Inking and printing with a printer's forme
    • B41M1/10Intaglio printing ; Gravure printing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00Inking and printing with a printer's forme
    • B41M1/14Multicolour printing
    • B41M1/18Printing one ink over another
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/005Colour cards; Painting supports; Latent or hidden images, e.g. for games; Time delayed images
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00Inks
    • C09D11/02Printing inks
    • C09D11/03Printing inks characterised by features other than the chemical nature of the binder
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00Inks
    • C09D11/02Printing inks
    • C09D11/10Printing inks based on artificial resins
    • C09D11/102Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00Inks
    • C09D11/02Printing inks
    • C09D11/10Printing inks based on artificial resins
    • C09D11/106Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00Inks
    • C09D11/02Printing inks
    • C09D11/10Printing inks based on artificial resins
    • C09D11/106Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C09D11/107Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof

Abstract

The invention relates to the technical field of printing anti-counterfeiting, in particular to a latent image embossing anti-counterfeiting structure and a preparation process thereof. The latent image embossing anti-counterfeiting structure comprises a bottom piece and a concave part formed on the surface of the bottom piece by pressing an embossing die, wherein the depth of the concave part is 0.008-0.012 mm; convex parts are formed between the adjacent concave parts, and the convex parts form the anti-counterfeiting pattern. The embossing die comprises regular trapezoidal convex parts arranged at intervals, inverted trapezoidal concave parts are formed between every two adjacent convex parts, the upper bottom of each convex part is 0.08-0.12mm, and the height of each convex part is 0.06-0.1 mm; the regular trapezoid is an isosceles trapezoid with a base angle of 45 degrees; the depressed part bears printing ink, and the depressed part forms an anti-counterfeiting pattern. The anti-counterfeiting pattern can be seen only when the structure obtained by the invention is obliquely viewed at a certain angle, and the latent image anti-counterfeiting effect is good.

Description

Latent image embossing anti-counterfeiting structure and preparation process thereof
Technical Field
The invention relates to the technical field of printing anti-counterfeiting, in particular to a latent image embossing anti-counterfeiting structure and a preparation process thereof.
Background
In the layout design, the angle, thickness, density, shape, etc. of some lines are changed on the base map of the regular arrangement of lines to form an implicit image, which is called a latent image. The latent image is widely applied to the anti-counterfeiting design of the plate pattern. Latent image patterns are designed from primary anti-counterfeiting common entrance tickets to advanced anti-counterfeiting bank notes. The latent image not only improves the aesthetic feeling of the layout, but also has the anti-counterfeiting function. The latent image has more patterns and the anti-counterfeiting function is strong or weak.
The latent image is mainly established by changing the shape and arrangement of lines, the creation modes are different, the appearance characteristics of the latent image are different, and the anti-counterfeiting function is different. The latent image can be realized by changing the line angle, thickness and density, and can be relief latent image, split line latent image and refraction latent image. The refraction latent image is a hidden latent image, a latent image cannot be seen in the front view, and the latent image is displayed in the oblique light view, and the blocking effect of the ink bulges on oblique light is utilized. The primary condition for achieving the refractive latent image is that the printing ink must have a certain thickness. The thicker the thick layer, the more pronounced the refractive latent image effect, since the more light the lines can block, the greater the difference in shade of color. Secondly, the lines are very thin, closely spaced and too thick, and latent images can be seen under normal conditions. The requirement of the refraction latent image on the printing process is very high, and the horizontal and longitudinal ink expansion degrees are required to be the same in the printing process, otherwise, the color density difference is generated, and the latent image can be seen under normal conditions.
Because the requirement of the latent image mode is very high, in the actual anti-counterfeiting printing process, the best latent image effect needs to be achieved through multiple times of debugging, time and labor are wasted, and therefore the latent image anti-counterfeiting structure and the preparation process thereof are needed, wherein the good latent image anti-counterfeiting effect can be achieved by limiting embossing die data and printing pressing data.
Disclosure of Invention
The invention aims to solve the problems and provides a latent image embossing anti-counterfeiting structure and a preparation process thereof.
The technical scheme for solving the problems is to provide a latent image embossing anti-counterfeiting structure which comprises a bottom piece and a concave part formed on the surface of the bottom piece by pressing an embossing die, wherein the depth of the concave part is 0.008-0.012 mm; convex parts are formed between the adjacent concave parts, and the convex parts form the anti-counterfeiting pattern.
Preferably, the recess depth is 0.01 mm.
The invention also aims to provide a preparation process of the latent image embossing anti-counterfeiting structure, which comprises the following steps:
(1) preparing a bottom piece;
(2) preparing an embossing die, wherein the embossing die comprises regular trapezoidal convex parts arranged at intervals, inverted trapezoidal concave parts are formed between every two adjacent convex parts, the upper bottom of each convex part is 0.08-0.12mm, and the height of each convex part is 0.06-0.1 mm; the regular trapezoid is an isosceles trapezoid with a base angle of 45 degrees; the depressed part bears printing ink, and the depressed part forms an anti-counterfeiting pattern;
(3) and laying the bottom piece on one surface of the embossing die provided with the convex part and the concave part, and applying pressure to the bottom piece or/and the embossing die to form the concave part and the convex part on the surface of the bottom piece and transfer printing ink of the concave part to the convex part of the bottom piece.
Preferably, the upper bottom of the boss is 0.1mm, and the height of the boss is 0.08 mm.
Preferably, the length of the lower bottom of the depression is not limited, but the shorter the better, preferably, the lower bottom of the depression is less than 0.1 mm.
Preferably, the embossing die is a metal die.
Preferably, the operation of step (3) is carried out three times, and the printing inks used in the three times are a reflective ink containing nano Cr powder, a medium ink and an absorbing ink containing nano Al powder in sequence.
Preferably, the reflective ink comprises, by mass, 7-9 parts of polyvinyl butyral, 1.5-2.5 parts of fumarated rosin ester, 9-11 parts of talcum powder, 1.5-2.5 parts of acetyl tributyl citrate, 64-68 parts of ethylene glycol and 3-5 parts of nano Cr powder.
Preferably, the absorbing ink comprises, by mass, 10-30 parts of ethoxylated trimethylolpropane triacrylate, 40-60 parts of urethane acrylate, 5-15 parts of acrylate, 1-10 parts of 1, 6-hexanediol diacrylate, (1-5 parts of 2, 4, 6-trimethylbenzoyl) diphenylphosphine oxide, 1-3 parts of isooctyl p-dimethylaminobenzoate, 0.01-0.5 part of silicone oil, 0.01-0.5 part of sodium dodecyl benzene sulfonate, 1-5 parts of PE wax and 10-18 parts of nano Al powder.
Preferably, the medium ink comprises, by mass, 1-2 parts of TEOS, 8-12 parts of ethanol and 10-15 parts of acrylic resin.
The invention has the beneficial effects that:
1. through debugging many times, obtain the concave-convex structure degree of depth and the embossing die data that can form good latent image anti-fake effect for when the printing pattern who obtains was looked to the light skew with certain angle, just can see anti-fake pattern.
2. And carrying out three times of gravure printing to obtain a Cr-medium-Al structure composite ink layer, wherein the reflected light color of the composite ink layer is changed by utilizing the interference effect of the multilayer optical ink layer when the composite ink layer is observed at different angles, so that the anti-counterfeiting pattern with a specific color can be seen only when the composite ink layer is obliquely viewed at a certain angle, and the refraction latent image effect is further improved.
3. The excellent anti-counterfeiting effect is achieved by using the double latent image effects of the pattern latent image and the color latent image.
4. Different ink layers are configured by different components, so that the fluidity, the thin consistency and the curing speed of each ink layer are different, the ink layers with different thicknesses are obtained, the color variation is improved, and the color change effect is improved.
Drawings
FIG. 1 is a schematic view of a latent image embossed security structure viewed obliquely to light;
fig. 2 is a schematic view of a latent image embossed security structure in front view.
Detailed Description
The following are specific embodiments of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Example 1
A latent image embossing anti-counterfeiting structure comprises a bottom piece and a concave part formed on the surface of the bottom piece by pressing an embossing die, wherein the depth of the concave part is 0.01 mm; convex parts are formed between the adjacent concave parts, and the convex parts form the anti-counterfeiting pattern.
The preparation process of the latent image embossing anti-counterfeiting structure comprises the following steps:
(1) preparing a bottom piece: paper with smooth surface is selected.
(2) Preparing an embossing die, wherein the embossing die comprises regular trapezoidal convex parts arranged at intervals, inverted trapezoidal concave parts are formed between every two adjacent convex parts, the upper bottom of each convex part is 0.1mm, and the height of each convex part is 0.08 mm; the regular trapezoid is an isosceles trapezoid with a base angle of 45 degrees; the depressed part constitutes anti-fake pattern, and the shorter base length of the depressed part of the inverted trapezoid is 0.1mm, and the embossing die is made into a roller shape by stainless steel.
(3) The bottom piece clamp is arranged between an embossing die and a pressing roller, an ink fountain and an ink scraping knife are arranged below the embossing die, the embossing die is opened to rotate and ink is applied, the depressed part bears ink, the raised part and other ink which is not provided with the anti-counterfeiting pattern part are scraped by the ink scraping knife, the pressing roller is opened to rotate and press, one end of the bottom piece is installed at a rotating shaft to be rolled, the raised part is pressed out of a concave part on the bottom piece, the depressed part is pressed out of a convex part on the bottom piece, and the ink of the depressed part is transferred to the convex part, so that the anti-counterfeiting pattern with concave-convex feeling is formed.
When printing, firstly, carrying reflective ink in an ink fountain, wherein the reflective ink is obtained by mixing 8 parts of polyvinyl butyral, 2 parts of fumaric acid rosin ester, 10 parts of talcum powder, 2 parts of acetyl tributyl citrate, 66 parts of ethylene glycol and 4 parts of nano Cr powder, stirring and dispersing at 40 ℃, and then grinding to the fineness of 10 mu m. After printing, drying for 15min at room temperature, and drying and curing.
And clamping the base piece subjected to the primary printing between an embossing die and a pressing roller in situ again, and carrying out secondary printing, wherein during the secondary printing, medium ink is loaded in an ink fountain, and is obtained by mixing 1.5 parts of TEOS, 10 parts of ethanol and 12 parts of acrylic resin, stirring and dispersing at 37 ℃, and grinding to the fineness of 15 mu m. After printing, drying for 15min at room temperature, and drying and curing.
And finally clamping the base piece subjected to secondary printing between an embossing die and a pressing roller in the original position, and carrying absorption ink in an ink duct, wherein the absorption ink is obtained by mixing 20 parts of ethoxylated trimethylolpropane triacrylate, 50 parts of urethane acrylate, 10 parts of acrylate, 5 parts of 1, 6-hexanediol diacrylate, (2, 4, 6-trimethylbenzoyl) diphenylphosphine oxide, 2 parts of isooctyl p-dimethylaminobenzoate, 0.3 part of silicone oil, 0.3 part of sodium dodecyl benzene sulfonate, 2 parts of PE wax and 15 parts of nano Al powder, stirring and dispersing at 40 ℃, and grinding to the fineness of 10 mu m. And after printing, drying for 15min at room temperature, and drying and curing to obtain the latent image embossing anti-counterfeiting structure.
The latent image embossed forgery-preventing structure obtained in this example has an excellent forgery-preventing effect, as shown in fig. 1, when viewed obliquely, and as shown in fig. 2, when viewed frontally.
Example 2
In the embodiment, the latent image embossing anti-counterfeiting structure comprises a bottom piece and a concave part formed on the surface of the bottom piece by pressing an embossing die, wherein the depth of the concave part is 0.008 mm; convex parts are formed between the adjacent concave parts, and the convex parts form the anti-counterfeiting pattern.
The preparation process of the latent image embossing anti-counterfeiting structure comprises the following steps:
(1) preparing a bottom piece: paper with smooth surface is selected.
(2) Preparing an embossing die, wherein the embossing die comprises regular trapezoidal convex parts arranged at intervals, inverted trapezoidal concave parts are formed between every two adjacent convex parts, the upper bottom of each convex part is 0.08mm, and the height of each convex part is 0.06 mm; the regular trapezoid is an isosceles trapezoid with a base angle of 45 degrees; the concave part forms an anti-counterfeiting pattern, the shorter bottom edge of the inverted trapezoidal concave part is 0.08mm, and the embossing die is in a plate shape made of nickel-based alloy.
(3) The bottom piece is clamped between an embossing die and a foaming plate, the embossing die is used for brushing ink, so that the concave part bears ink, the convex part and other ink which is not provided with the anti-counterfeiting pattern part are scraped by a doctor blade, then the foaming plate is opened and pressed downwards, so that the convex part is pressed on the bottom piece to form a concave part, the concave part is pressed on the bottom piece to form a convex part, and the ink of the concave part is transferred to the convex part, so that the anti-counterfeiting pattern with concave-convex feeling is formed.
When printing, firstly coating reflective ink on an embossing die, wherein the reflective ink is obtained by mixing 7 parts of polyvinyl butyral, 1.5 parts of fumaric acid rosin ester, 9 parts of talcum powder, 1.5 parts of acetyl tributyl citrate, 64 parts of ethylene glycol and 3 parts of nano Cr powder, stirring and dispersing at 40 ℃, and grinding to the fineness of 10 mu m. After printing, drying for 15min at room temperature, and drying and curing.
And then carrying out secondary printing, and brushing medium ink on an embossing die, wherein the medium ink is obtained by mixing 1 part of TEOS, 8 parts of ethanol and 10 parts of acrylic resin, stirring and dispersing at 37 ℃, and grinding to the fineness of 15 mu m. After printing, drying for 15min at room temperature, and drying and curing.
And finally, brushing absorption ink on an embossing die, wherein the absorption ink is prepared by mixing 10 parts of ethoxylated trimethylolpropane triacrylate, 40 parts of urethane acrylate, 5 parts of acrylate, 1 part of 1, 6-hexanediol diacrylate, (1 part of 2, 4, 6-trimethylbenzoyl) diphenylphosphine oxide, 1 part of isooctyl p-dimethylaminobenzoate, 0.01 part of silicone oil, 0.01 part of sodium dodecyl benzene sulfonate, 1 part of PE wax and 10 parts of nano Al powder, stirring and dispersing at 40 ℃, and grinding to the fineness of 10 mu m. And after printing, drying for 15min at room temperature, and drying and curing to obtain the latent image embossed anti-counterfeiting structure.
Example 3
A latent image embossing anti-counterfeiting structure comprises a bottom piece and a concave part formed on the surface of the bottom piece by pressing an embossing die, wherein the depth of the concave part is 0.012 mm; convex parts are formed between the adjacent concave parts, and the convex parts form the anti-counterfeiting pattern.
The preparation process of the latent image embossing anti-counterfeiting structure comprises the following steps:
(1) preparing a bottom piece: paper with smooth surface is selected.
(2) Preparing an embossing die, wherein the embossing die comprises regular trapezoidal convex parts arranged at intervals, inverted trapezoidal concave parts are formed between every two adjacent convex parts, the upper bottom of each convex part is 0.12mm, and the height of each convex part is 0.1 mm; the regular trapezoid is an isosceles trapezoid with a base angle of 45 degrees; the concave part forms an anti-counterfeiting pattern, the shorter bottom edge of the inverted trapezoidal concave part is 0.1mm in length, and the embossing die is made into a roller shape by nickel-based alloy.
(3) The bottom piece clamp is arranged between an embossing die and a pressing roller, an ink fountain and an ink scraping knife are arranged below the embossing die, the embossing die is opened to rotate and ink is applied, the depressed part bears ink, the raised part and other ink which is not provided with the anti-counterfeiting pattern part are scraped by the ink scraping knife, the pressing roller is opened to rotate and press, one end of the bottom piece is installed at a rotating shaft to be rolled, the raised part is pressed out of a concave part on the bottom piece, the depressed part is pressed out of a convex part on the bottom piece, and the ink of the depressed part is transferred to the convex part, so that the anti-counterfeiting pattern with concave-convex feeling is formed.
When printing, firstly, the reflective ink is loaded in an ink fountain, and is obtained by mixing 9 parts of polyvinyl butyral, 2.5 parts of fumaric acid rosin ester, 11 parts of talcum powder, 2.5 parts of acetyl tributyl citrate, 68 parts of ethylene glycol and 5 parts of nano Cr powder, stirring and dispersing at 40 ℃, and then grinding to the fineness of 10 mu m. After printing, drying for 15min at room temperature, and drying and curing.
And clamping the bottom piece subjected to primary printing between an embossing die and a pressing roller again in situ, and carrying out secondary printing, wherein during the secondary printing, medium ink is loaded in an ink fountain, and is obtained by mixing 2 parts of TEOS, 12 parts of ethanol and 15 parts of acrylic resin, stirring and dispersing at 37 ℃, and grinding to the fineness of 15 mu m. After printing, drying for 15min at room temperature, and drying and curing.
And finally clamping the base piece subjected to secondary printing between an embossing die and a pressing roller in the original position, and carrying absorption ink in an ink duct, wherein the absorption ink is obtained by mixing 30 parts of ethoxylated trimethylolpropane triacrylate, 60 parts of urethane acrylate, 15 parts of acrylate, 10 parts of 1, 6-hexanediol diacrylate, (2, 4, 6-trimethylbenzoyl) diphenylphosphine oxide, 3 parts of isooctyl p-dimethylaminobenzoate, 0.5 part of silicone oil, 0.5 part of sodium dodecyl benzene sulfonate, 5 parts of PE wax and 18 parts of nano Al powder, stirring and dispersing at 40 ℃, and grinding to the fineness of 10 mu m. And after printing, drying for 15min at room temperature, and drying and curing to obtain the latent image embossing anti-counterfeiting structure.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (9)

1. A latent image embossing anti-counterfeiting structure is characterized in that: the embossing die comprises a bottom piece and a concave part formed on the surface of the bottom piece by pressing the embossing die, wherein the depth of the concave part is 0.008-0.012 mm; convex parts are formed between the adjacent concave parts, and the convex parts form the anti-counterfeiting pattern.
2. The latent image embossed security feature of claim 1, wherein: the recess depth is 0.01 mm.
3. A process for preparing a latent image embossed security feature according to any one of claims 1 to 2, wherein: the method comprises the following steps:
preparing a bottom piece;
preparing an embossing die, wherein the embossing die comprises regular trapezoidal convex parts arranged at intervals, inverted trapezoidal concave parts are formed between every two adjacent convex parts, the upper bottom of each convex part is 0.08-0.12mm, and the height of each convex part is 0.06-0.1 mm; the regular trapezoid is an isosceles trapezoid with a base angle of 45 degrees; the depressed part bears printing ink, and the depressed part forms an anti-counterfeiting pattern; (on the concave part)
And laying the bottom piece on one surface of the embossing die provided with the convex part and the concave part, and applying pressure to the bottom piece or/and the embossing die to form the concave part and the convex part on the surface of the bottom piece and transfer printing ink of the concave part to the convex part of the bottom piece.
4. The process for preparing a latent image embossed security structure according to claim 3, wherein: the upper bottom of bellying is 0.1mm, the height of bellying is 0.08 mm.
5. The process for preparing a latent image embossed security structure according to claim 3, wherein: the embossing die is a metal die.
6. The process for preparing a latent image embossed security structure according to claim 3, wherein: and (4) carrying out the operation of the step (3) for three times, wherein the printing ink used for three times sequentially comprises reflection ink containing nano Cr powder, medium ink and absorption ink containing nano Al powder.
7. The process for preparing a latent image embossed security structure according to claim 6, wherein: the reflective ink comprises, by mass, 7-9 parts of polyvinyl butyral, 1.5-2.5 parts of fumarated rosin ester, 9-11 parts of talcum powder, 1.5-2.5 parts of acetyl tributyl citrate, 64-68 parts of ethylene glycol and 3-5 parts of nano Cr powder.
8. The process for preparing a latent image embossed security structure according to claim 6, wherein: according to parts by mass, the absorption ink comprises 10-30 parts of ethoxylated trimethylolpropane triacrylate, 40-60 parts of urethane acrylate, 5-15 parts of acrylate, 1-10 parts of 1, 6-hexanediol diacrylate, (1-5 parts of 2, 4, 6-trimethylbenzoyl) diphenylphosphine oxide, 1-3 parts of isooctyl p-dimethylaminobenzoate, 0.01-0.5 part of silicone oil, 0.01-0.5 part of sodium dodecyl benzene sulfonate, 1-5 parts of PE wax and 10-18 parts of nano Al powder.
9. The process for preparing a latent image embossed security structure according to claim 6, wherein: the medium ink comprises, by mass, 1-2 parts of TEOS, 8-12 parts of ethanol and 10-15 parts of acrylic resin.
CN202010019993.2A 2020-01-09 2020-01-09 Latent image embossing anti-counterfeiting structure and preparation process thereof Pending CN111098617A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113183651A (en) * 2020-10-12 2021-07-30 安徽美阅文化发展股份有限公司 Printing process for forming crack effect on surface of printed matter and printed matter thereof

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