CN110322777B - Anti-counterfeiting label and preparation method thereof - Google Patents
Anti-counterfeiting label and preparation method thereof Download PDFInfo
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
- G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/0257—Multilayer
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Abstract
The invention relates to the technical field of printing, in particular to an anti-counterfeiting label and a preparation method of the anti-counterfeiting label. The invention aims to provide an anti-counterfeit label and a preparation method of the anti-counterfeit label, wherein the anti-counterfeit label comprises a laser layer, a transparent first diffusion coating, a first ink layer with random shrinkage graphics and texts, a transparent second diffusion coating and a second ink layer with random shrinkage graphics and texts, and the laser layer, the first diffusion coating, the first ink layer, the second diffusion coating and the second ink layer are sequentially distributed; the colors of the laser layer, the first ink layer and the second ink layer are different from each other. The anti-counterfeiting label has the characteristics of three-dimension and non-replicability, the anti-counterfeiting performance is enhanced, and the uniqueness of the anti-counterfeiting label is improved.
Description
Technical Field
The invention relates to the technical field of printing, in particular to an anti-counterfeiting label and a preparation method of the anti-counterfeiting label.
Background
Along with the development of national economy and technology, the anti-counterfeiting technology is gradually changed from the use occasions of passports, certificates, currencies, tickets and securities manufactured by traditional departments of banks, customs, tax, finance, public security and the like to civil use, and has wide application potential in the fields of cigarettes, wine, foods, medicines, health-care products, cosmetics, clothing, optical discs, pesticides and fertilizers, automobile parts, daily necessities and the like. The anti-fake label is one of the cross-discipline technology in optical, chemical, physical, electromagnetic, computer, spectral, digital gravure, packing gravure, etc. At present, the anti-counterfeiting technology is various, such as a laser holographic technology, a watermarking technology, an electric code technology, a digital code, a bar code and a two-dimensional code, and has the characteristic of being not removable. The prior structure anti-counterfeiting technology generally performs anti-counterfeiting by sticking a laser film to the structure. However, similar patterns and lines of the laser film may exist, and the same laser film may be adhered to different structures, so that the anti-counterfeiting strength is reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an anti-counterfeiting label and a preparation method of the anti-counterfeiting label, which have the characteristics of three-dimension and non-replicability, enhance anti-counterfeiting performance and improve the uniqueness of the anti-counterfeiting label.
The invention adopts the following technical scheme:
The invention provides an anti-counterfeiting label which comprises a laser layer, a transparent first diffusion coating, a first ink layer with random shrinkage graphics and texts, a transparent second diffusion coating and a second ink layer with random shrinkage graphics and texts, wherein the laser layer, the first diffusion coating, the first ink layer, the second diffusion coating and the second ink layer are sequentially distributed; the colors of the laser layer, the first ink layer and the second ink layer are different from each other.
Preferably, the base color of the laser layer is silver.
Preferably, the first ink layer is yellow and the second ink layer is blue.
Preferably, the laser layer is a laser cardboard, the first diffusion coating and the second diffusion coating are both UV gloss oil layers, and the first ink layer and the second ink layer are both UV ink layers.
The invention provides a preparation method of an anti-counterfeiting label, which comprises the following steps: a laser layer is selected, and a transparent first diffusion coating is coated on the laser layer; printing a first ink on the first diffusion coating, and forming a first ink layer with random shrinkage graphics and texts after curing; after the first ink layer is cured, coating a transparent second diffusion coating on the first ink layer; printing a second printing ink on the second diffusion coating, and forming a second printing ink layer with random shrinkage graphics and texts after curing; the colors of the laser layer, the first ink layer and the second ink layer are different from each other.
Preferably, the first diffusion coating and the second diffusion coating each comprise UV gloss oil and a diffusion agent, wherein the weight of the diffusion agent accounts for 0.5% -2% of the weight of the first diffusion coating, and the weight of the diffusion agent accounts for 0.5% -2% of the weight of the second diffusion coating.
Preferably, the first ink and the second ink each include a diffusing agent, a foaming agent, a cracking agent, and a curing agent, wherein the total amount of the diffusing agent, the foaming agent, and the cracking agent added is 2% to 5% of the weight of the first ink, the total amount of the diffusing agent, the foaming agent, and the cracking agent added is 2% to 5% of the weight of the second ink, and the total amount of the diffusing agent, the foaming agent, and the cracking agent added is less than or equal to 5% to 10% of the weight of the first ink, and the total amount of the diffusing agent, the foaming agent, and the cracking agent added is less than or equal to 5% to 10% of the weight of the second ink; the weight of the curing agent accounts for 0.5-5% of the weight of the first ink, and the weight of the curing agent accounts for 0.5-5% of the weight of the second ink.
Preferably, the first ink is ultraviolet curing ink, and the first ink is cured by ultraviolet light to form the first ink layer; the second ink is ultraviolet curing ink, and the first ink is cured through ultraviolet light to form the second ink layer.
Preferably, in the step of printing the first ink on the first diffusion coating layer and forming the first ink layer with random shrinkage graphics and texts after curing, printing the first ink on the first diffusion coating layer in a mode of one or more than two of points, lines and surfaces, and forming the first ink layer after curing; and printing second ink on the second diffusion coating, and in the step of forming a second ink layer with random shrinkage graphics and texts after curing, printing the second ink on the second diffusion coating in a mode of combining one or more of points, lines and surfaces, and forming a second ink layer after curing.
Preferably, the first ink is printed on the first diffusion coating before the first diffusion coating is uncured; printing the second ink on the second diffusion coating before the second diffusion coating is uncured.
Preferably, the first ink is printed on the first diffusion coating after the first diffusion coating is cured; printing the second ink on the second diffusion coating after the second diffusion coating is cured.
Compared with the prior art, the invention has the beneficial effects that:
The anti-counterfeiting label comprises a radiation layer, a first diffusion coating, a second diffusion coating, a first ink layer and a second ink layer with random shrinkage graphics and texts, wherein positions covered by the first ink layer and/or the second ink layer show random mechanism characteristics of different colors, positions uncovered by the first ink layer and/or the second ink layer show laser patterns of a laser layer, a three-dimensional anti-counterfeiting structure is shown, the anti-counterfeiting label has the characteristic of being unclonable, and the anti-counterfeiting effect is enhanced.
According to the invention, the transparent first diffusion coating and the transparent second diffusion coating are arranged on the radiation layer, so that the adhesive force of the first ink layer and the second ink layer is enhanced; by arranging the first ink layer and the second ink layer with random graphics and texts on the radiation layer, the positions, which are covered by the first ink layer and/or the second ink layer, on the laser layer represent random codes with various colors, the positions, which are not covered by the first ink layer and/or the second ink layer, represent laser patterns of the laser layer, namely the formed anti-counterfeiting label simultaneously represents random structural features with different colors and different depths, and the structural features are three-dimensional, unique and non-replicable, and can represent dynamic color change effects along with the change of light, so that the anti-counterfeiting performance is improved.
Drawings
FIG. 1 is a schematic diagram of an anti-counterfeit label according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an anti-counterfeit label according to an embodiment of the present invention.
In the figure: 1. a laser layer; 2. a first diffusion coating; 3. a first ink layer; 4. a second diffusion coating; 5. and a second ink layer.
Detailed Description
The invention will now be described in more detail with reference to the accompanying drawings, to which it should be noted that the description is given by way of illustration only and not by way of limitation. Various embodiments may be combined with one another to form further embodiments not shown in the following description.
The invention provides an anti-counterfeiting label, as shown in figure 1, which comprises a laser layer 1, a transparent first diffusion coating 2, a first ink layer 3 with random shrinkage graphics and texts, a transparent second diffusion coating 4 and a second ink layer 5 with random shrinkage graphics and texts, wherein the laser layer 1, the first diffusion coating 2, the first ink layer 3, the second diffusion coating 4 and the second ink layer 5 are sequentially distributed (sequentially distributed from bottom to top); the colors of the laser layer 1, the first ink layer 3 and the second ink layer 5 are different from each other. The laser layer can be coated paper, synthetic paper, fragile paper, polyethylene terephthalate (PET) and other self-adhesive base materials with laser characteristics on the surface. Specifically, a transparent first diffusion coating is coated on the laser layer, a first ink layer is printed on the first diffusion coating, a transparent second diffusion coating is coated on the first ink layer, and then a second ink layer is printed on the second diffusion coating, so that the positions, covered by the first ink layer and/or the second ink layer, on the laser layer present random codes (respectively, the colors of the laser layer, the first ink layer, the second ink layer and the colors formed by combining the first ink layer and the second ink layer (such as yellow and green after combining), and the positions, uncovered by the first ink layer and the second ink layer, present laser patterns (namely, the colors of the laser layer), namely, the positions, covered by the first ink layer and the second ink layer, present random texture structures with different depths and different colors on the formed anti-counterfeit label simultaneously.
In one embodiment, the laser layer is laser silver, the base color is silver, and the laser layer with the base color being silver can reflect light with multiple colors as much as possible under the action of light, so that a color surface is presented. The first ink layer is yellow, the second ink layer is blue, namely the first ink layer which is contracted into yellow after the yellow first ink is printed, the second ink layer which is contracted into blue after the blue second ink is printed, the green ink layer is overlapped at the overlapping position of the first ink layer and the second ink layer, and the original color of the laser layer is presented at the position which is not covered by the first ink layer and the second ink layer on the laser layer. In other embodiments, the laser layer may further select other colors, for example, the laser layer may further select a base color of yellow or blue, and the first ink layer and the second ink layer may select other colors different from the laser layer, so long as the colors of the laser layer, the first ink layer, and the second ink layer are different.
In a specific embodiment, the laser layer is a laser card paper, the first diffusion coating and the second diffusion coating are UV gloss oil layers, the UV gloss oil layers are in transparent states, the colors of the laser card paper can be displayed, the first ink layer and the second ink layer are all UV ink layers, ultraviolet light is used for curing in the printing process, the colors of the first ink layer and the second ink layer are different, and the anti-counterfeiting effect of the label is enhanced by multiple color combinations. In another embodiment, the first and second diffusion coatings are water-soluble clear inks and the first and second ink layers are both water-soluble ink layers; or the first diffusion coating and the second diffusion coating are UV gloss oil, and the first ink layer and the second ink layer are water-soluble ink layers or other combination modes, which are not limited by the invention.
The random pattern anti-counterfeit label generated by ink shrinkage has the following characteristics: the random graph and text formed by the shrinkage of the ink has strong randomness and extremely low repetition rate; ; the anti-counterfeit label formed by the shrinkage of the ink has concave-convex feeling, has three-dimensional random characteristics, increases physical properties, forms dynamic change by laser shading, cannot be counterfeited in a copying mode, and the like. The laser layer has the colors under the light, so that the laser layer has three-dimensional stereo random characteristics and four-dimensional dynamic random characteristics, dynamic changes are increased, the copied pattern cannot be forged, the random pattern without dynamic changes is overcome, and the copying and forging are easy to realize through photographing and the like. That is, the anti-counterfeit label is difficult to copy, namely after the dynamic characteristics are added, the anti-counterfeit label cannot be copied by photographing and other modes; the random code is difficult to imitate, the imitation difficulty is greatly increased by four-dimensional random codes, and the counterfeit random codes cannot pass verification by feature comparison. The anti-counterfeit label supports quick scanning, passes through an identification program, is verified for multiple times, is objectively verified, and does not need manual subjective intervention.
Specifically, the scanning identification of the anti-counterfeit label also needs to include a bar code area, wherein the bar code area is a one-dimensional code or a two-dimensional code directly printed on the substrate by adopting a printing process or other graphic identification codes which can store information and can be identified by the terminal SDK and are positioned outside the anti-counterfeit label. Extracting the characteristics of random pattern positions, shapes, directions, intervals, heights, colors, powder blocks, brightness, darkness, areas and the like through a rapid imaging device and a pattern algorithm, and storing the characteristics to a cloud; when a consumer scans codes, images captured by a mobile phone camera are uploaded to the cloud through video and code scanning of a recognition program, and features are compared through a cloud AI algorithm.
The invention also provides a preparation method of the anti-counterfeiting label, which comprises the following steps in a specific embodiment: step (1): the laser layer is selected, and a transparent first diffusion coating is coated on the laser layer, wherein the laser layer can be coated with a self-adhesive base material such as coated paper, synthetic paper, fragile paper, polyethylene terephthalate (PET) and the like; step (2): printing a first ink on the first diffusion coating, and after the first ink contracts on the first diffusion coating for a certain time (for example, 3-10 seconds), forming a first ink layer of random contraction graphics and texts after solidification; step (3): after the first ink layer is cured, coating a transparent second diffusion coating on the first ink layer; step (4): printing a second ink on the second diffusion coating, and after the second ink contracts on the second diffusion coating for a certain time (for example, 3-10 seconds), forming a second ink layer with randomly contracted graphics and texts after curing; the colors of the laser layer, the first ink layer and the second ink layer are different from each other. The first ink and the second ink are ultraviolet curing ink (UV ink), and the printing of the first ink and the second ink can be respectively carried out after the first diffusion coating and the second diffusion coating are cured, or can be carried out before the first diffusion coating and the second diffusion coating are cured, the mutual physical interaction of the first ink and the first diffusion coating, the second ink and the second diffusion coating at each position is different, and finally, the formed random codes at each position are different. The first diffusion coating and the second diffusion coating can be applied by plate-making printing, flexography, gravure, screen printing, etc.; printing of the first ink layer and the second ink layer may be plate-making printing, flexo printing, gravure printing, screen printing, or the like. The first and second diffusion coatings are used to enhance adhesion of the first and second ink layers, respectively, and are capable of accelerating flow of the first and second ink layers.
It should be appreciated that printing the first ink layer and the second ink layer on the radiation layer, the positions on the radiation layer covered by the first ink layer and/or the second ink layer present random codes of different colors (the colors presented after the radiation layer, the first ink layer, the second ink layer, and the first ink layer and the second ink layer overlap, respectively), the positions not covered by the first ink layer and the second ink layer present laser patterns, present random structural features of different shades and different color laser textures, and the formed structural combination features are three-dimensional, stereoscopic, unique, non-replicable physical anti-counterfeiting principles of the structure, and present dynamic and shade and color changing effects as a whole along with light changes, referring to fig. 2.
The anti-counterfeiting label is printed on a photosensitive material substrate (laser layer), and random codes are formed by randomly shrinking patterns according to a chaos principle by utilizing the ink shrinkage force and the rejection of a coating, so that four-dimensional characteristics are presented: the random pattern features represent three-dimensional features, including random shades of random patterns, three-dimensional structural features with concave color sense, and three-dimensional features such as random pattern positions, shapes, directions, intervals, heights and the like; the photosensitive features show four-dimensional features, and under different angles, the colors of random patterns, the brightness change of powder blocks, the area change and the like are changed; physical characteristics, has a certain concave-convex feeling.
In one embodiment, the laser layer is made of laser silver, and the base color is silver, so that light with multiple colors can be reflected as much as possible. The first ink layer and the second ink layer may be of other colors than the laser layer color, and the first ink layer and the second ink layer are of different colors. Preferably, the laser layer is silver, the first ink layer is yellow, and the second ink layer is blue. The laser layer is covered by the first ink layer and/or the second ink layer to form a random code of three colors of yellow, blue and green (the first yellow ink layer and the second blue ink layer are overlapped to form green), the uncovered position is provided with laser patterns, and random structural features of different shades and different colors of laser textures are formed at the same time, and the formed structural combination features are three-dimensional, unique and unclonable physical anti-counterfeiting principles, and the whole dynamic change, the effect of the shades and the colors are formed along with the change of light.
According to an embodiment of the present invention, in the step (2), printing the first ink layer by performing one or a combination of two or more of dots, lines, and surfaces on the first diffusion coating; and (4) printing a second ink layer on the second diffusion coating in a mode of combining one or more of points, lines and surfaces.
According to an embodiment of the present invention, the first diffusion coating and the second diffusion coating each include UV varnish and a diffusion agent, wherein the weight of the diffusion agent is 0.5% to 2% of the weight of the first diffusion coating, for example, the weight of the diffusion agent is 1% of the weight of the first diffusion coating, the weight of the diffusion agent is 0.5% to 2% of the weight of the second diffusion coating, for example, the weight of the diffusion agent is 1% of the weight of the second diffusion coating, the weight of the diffusion agent is less than 0.5% of the weight of the diffusion agent may cause poor flowability of the first diffusion coating or the second diffusion coating, and the weight of the diffusion agent is more than 2% of the weight of the diffusion agent may cause incomplete curing of the UV varnish. The first diffusion coating and the second diffusion coating also comprise additives such as foaming agents, cracking agents, organic silicon, curing agents and the like, so that factors of the gloss oil on the laser layer are smoother and smoother, and the transparency is higher. It should be understood that the proportion of the diffusing agent is adjusted according to the printing substrate, the printing speed, the Ultraviolet (UV) power and the like, and if the UV varnish has high surface tension, is difficult to expand, has high printing speed and low UV power, the adding amount of the diffusing agent is increased; if the UV varnish has a small surface tension, is easy to expand, has a slow printing speed, and has high Ultraviolet (UV) power, the addition amount of the diffusing agent is reduced. The dispersing agent is a leveling agent, and can be acrylic resin, urea-formaldehyde resin, melamine formaldehyde resin and the like, and the addition of the dispersing agent can accelerate the diffusion speed of UV gloss oil, and the gloss oil is accompanied by bubbles, so that a coating formed on the surface of the laser layer by the gloss oil is more layered.
According to an embodiment of the present invention, the first ink and the second ink each include a diffusing agent, a foaming agent, a cracking agent, and a curing agent, wherein the total amount of the diffusing agent, the foaming agent, and the cracking agent added is 2% to 5% by weight of the first ink, for example, the total amount of the diffusing agent, the foaming agent, and the cracking agent added is 3% to 5% by weight of the second ink, for example, the total amount of the diffusing agent, the foaming agent, and the cracking agent added is 3% by weight of the second ink, and the total amount of the diffusing agent, the foaming agent, and the cracking agent added is less than or equal to 5% to 10% by weight of the first ink, and the total amount of the diffusing agent, the foaming agent, and the cracking agent added is less than or equal to 5% to 10% by weight of the second ink; the weight ratio of the curing agent is 0.5-5% of the weight of the first ink, such as 3% of the weight of the curing agent, and the weight ratio of the curing agent is 0.5-5% of the weight of the second ink, such as 3% of the weight of the curing agent. In the step (2), the first ink is solidified through ultraviolet light to form a first ink layer; in the step (4), the second ink layer is cured by ultraviolet light to form a second ink layer.
Specifically, the first ink for printing the first ink layer and the second ink for printing the second ink layer are formed by mixing additives such as an ink dispersing agent, a foaming agent, a cracking agent and the like. The dispersing agent can be acrylic resin, urea resin, melamine formaldehyde resin and the like, and has the function of accelerating the diffusion of the first printing ink and the second printing ink on the first diffusion coating and the second diffusion coating respectively; the foaming agent can be low-boiling alkane and fluorocarbon, and the function of the foaming agent is to increase the foam quantity of the ink; the cracking agent is a low-boiling point and volatile organic solvent; such as toluene, n-hexane; the function of the cracking agent is to crack during ink molding to form random cracks.
It should be appreciated that the addition of the diffusion agent, the foaming agent, and the cracking agent may accelerate the diffusion and formation of the ink, shorten the formation time of the random code, and greatly promote the randomness and complexity of the formed pattern. The total dosage of the dispersing agent, the foaming agent and the cracking agent is between 2 and 10 percent of the weight of the ink, and the addition of more than 10 percent can cause incomplete UV curing and even cause glue overflow and non-molding; the addition amount is less than 2%, and the above-mentioned effects are not achieved. In a specific experiment, the overall dosage of the dispersing agent, the foaming agent and the cracking agent needs to be adjusted according to actual operation requirements, and the invention is not limited to the above. The curing agent can be one or more than two of photoinitiators such as 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide (TPO), 1-hydroxy-cyclohexyl-phenyl ketone (184), phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide (819), 2-Isopropylthioxanthone (ITX), 2022 and the like. More than two curing agents are added into the ink, and different curing agents act under different wavelengths so as to fully utilize ultraviolet wavelengths and improve the curing efficiency. In a specific experiment, the types, combinations and addition amounts of the curing agents need to be adjusted according to actual operation requirements, and the invention is not limited thereto.
The first ink and the second ink are ultraviolet curing ink, ultraviolet lamps can be used for drying color ink in the curing process of the first ink and the second ink, the curing requirements such as wavelength and required ultraviolet lamp power are estimated, and ultraviolet curing equipment such as mercury lamps, halogen lamps and LED lamps can be selected for ultraviolet curing. The ultraviolet lamp irradiates the first ink and the second ink, so that the first ink and the second ink can be completely cured, and a first ink layer and a second ink layer are correspondingly formed. After the drying is finished, carrying out adhesive force test on the first printing ink layer and the second printing ink layer on the UV gloss oil by adopting adhesive tapes, and if the adhesive force is enough, carrying out subsequent operation; if the adhesion is insufficient, the curing agent content of the color ink (first ink and second ink) can be adjusted until the adhesion reaches the standard.
According to one embodiment of the invention, a first ink layer is printed on the first diffusion coating before the first diffusion coating is uncured; a second ink layer is printed over the second diffusion coating before the second diffusion coating is uncured. A layer of whole diffusion coating is printed on the substrate, the diffusion coating does not need to be subjected to UV curing, and the proportion of the diffusion agent is adjusted according to the printing substrate, the printing speed and the like. The proportion of the dispersing agent is adjusted according to the printing substrate, the printing speed and the like, and specifically, the surface of the printing substrate is difficult to expand, the printing speed is high, and the required addition amount is large; the surface of the printing substrate is easy to expand, and the addition amount is small if the printing speed is low.
Printing a first ink (UV yellow ink) on the undried first diffusion coating in a mode of combining one or more of points, lines and surfaces to form a first ink layer, wherein the first ink repels, splits and foams (can be slightly/severely) to form a random shrinkage pattern (random code) when encountering the undried coating, and then carrying out ultraviolet drying and curing. The first ink formula is formed by mixing ink with additives such as a dispersing agent, a foaming agent, a cracking agent and the like. The first ink may be used in conventional plate making printing, flexography, lithography, gravure, screen printing, and the like.
It should be appreciated that the addition of the diffusion agent, the foaming agent, and the cracking agent may accelerate the diffusion and formation of the ink, shorten the formation time of the random code, and greatly promote the randomness and complexity of the formed pattern. The total dosage of the dispersing agent, the foaming agent and the cracking agent is between 2 and 10 percent of the weight of the ink, and the addition of more than 10 percent can lead to incomplete UV curing and even to glue overflow and non-molding; the addition amount is less than 2%, and the above-mentioned effects are not achieved. In a specific experiment, the amounts of the dispersing agent, the foaming agent and the cracking agent need to be adjusted according to actual operation requirements, and the invention is not limited to the above.
The addition amount of the curing agent determines the molding quality of the final ink, the curing agent can be one or more than two of photoinitiators such as 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide (TPO), 1-hydroxy-cyclohexyl-phenyl ketone (184), phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide (819), 2-Isopropyl Thioxanthone (ITX) and 2022, the total amount is 0.5% -5% of the weight of the ink, in specific experiments, the type, combination and amount of the curing agent need to be adjusted according to actual operation requirements, and the invention is not limited to this.
Specifically, the color ink may be dried by using an ultraviolet lamp, and ultraviolet curing devices such as a mercury lamp, a halogen lamp, and an LED lamp may be selected for ultraviolet curing. And the ultraviolet lamp irradiates the first ink on the first diffusion coating for 2-10 seconds, so that the first ink can be completely cured to form a first ink layer. After the drying is finished, carrying out adhesive force test on the color ink layer (first ink) on the UV gloss oil by adopting an adhesive tape, and if the adhesive force is enough, carrying out subsequent operation; if the adhesive force is insufficient, the content of the curing agent of the color ink can be adjusted until the adhesive force reaches the standard.
In the preparation process of the anti-counterfeiting label, a first diffusion coating is printed on a laser layer, a first printing ink (UV yellow printing ink) is printed on the first diffusion coating to form a first printing ink layer, and a second diffusion coating is printed on the first printing ink layer. Conventional plate making printing, flexography, lithography, gravure, screen printing, etc. are employed herein. The second diffusion coating is the same as the first diffusion coating in material and the diffusion time is consistent with the first diffusion coating.
Printing a second ink (UV blue ink) on the second undried diffusion coating in a mode of one or more of points, lines and surfaces to form a second ink layer, wherein the second ink is repelled, split and foamed (can be slightly/severely) to form a random shrinkage pattern (random code) when encountering the undried second diffusion coating, and then carrying out Ultraviolet (UV) drying and curing. The formulation of the second ink and the first ink remained consistent, the only difference being that the ink color changed from yellow to blue, and the second ink cured in a process consistent with the first ink. When printing varnish and ink, defoaming and leveling treatment of the varnish and the ink are not needed.
After the first ink layer and the second ink layer are dried, adhesive force testing is carried out on the first ink layer and the second ink layer on UV gloss oil (a first diffusion coating and a second diffusion coating) by using adhesive tapes, and if the adhesive force is enough, subsequent operation is carried out; if the adhesive force is insufficient, the content of the curing agent of the color ink can be adjusted until the adhesive force reaches the standard. The specific method for the adhesive force test comprises the following steps: the UV varnish and the color ink which are adhered to the laser layer are pulled by the adhesive tape, and if the UV varnish and the color ink are pulled to fall off and adhere to the adhesive tape, the adhesive force of the UV varnish is insufficient; if the color ink is pulled to fall off and adhere to the adhesive tape, but the UV gloss oil cannot adhere to the adhesive tape, the adhesive force of the color ink is insufficient, and the adhesive force of the UV gloss oil is sufficient; if the UV varnish and the color ink are pulled, the UV varnish and the color ink cannot fall off and adhere to the adhesive tape, and the adhesive force of the UV varnish and the color ink is enough.
According to another embodiment of the invention, after the first diffusion coating is cured, printing a first ink layer on the first diffusion coating; after the second diffusion coating is cured, a second ink layer is printed on the second diffusion coating. A first diffusion coating is printed over the laser layer and Ultraviolet (UV) dried and cured. Printing of the first diffusion coating may employ conventional plate-making printing, flexographic printing, lithographic printing, gravure printing, screen printing, and the like.
The first diffusion coating is formed by mixing UV gloss oil and a dispersing agent, and the dispersing agent can accelerate the diffusion speed of the UV gloss oil, and the UV gloss oil is accompanied by bubbles, so that the coating formed on the surface of the card paper by the UV gloss oil is more layered. And drying and curing the gloss oil by adopting an ultraviolet lamp, for example, irradiating the gloss oil for 2-3 seconds by using a mercury lamp with the power of 1500-2000W. The proportion of the dispersing agent is adjusted according to the printing substrate, the printing speed, the power of the UV lamp and the like, and specifically, the surface of the printing substrate is difficult to expand, the printing speed is high, the power of the UV lamp is low, and the adding amount is large; the surface of the printing substrate is easy to expand, the printing speed is low, and the addition amount is small when the UV power is high.
It will be appreciated that printing is most different before and after the first diffusion coating is cured, in that printing of the first ink layer is after the first diffusion coating is cured. The varnish can be dried by an ultraviolet lamp, and can be cured by ultraviolet by selecting a halogen lamp, a mercury lamp, an LED lamp and the like according to the curing effect, specifically, the coated varnish can be completely cured by irradiating the ultraviolet lamp for 1-6 seconds.
Printing a first ink (UV yellow ink) at the cured first diffusion coating in one or more combinations of dots, lines and faces to form a first ink layer, flowing, splitting and foaming the first ink on the dried coating (which can be slight/severe) to form a random shrink pattern (random code), and drying and curing by Ultraviolet (UV). The first ink formula is formed by mixing ink with additives such as a dispersing agent, a foaming agent, a cracking agent and the like. The function of the diffusing agent is to accelerate the diffusion of the first ink on the first diffusion coating; the function of the foaming agent is to increase the foam content of the first ink itself; the function of the cracking agent is that the first printing ink cracks during forming, and random cracks are formed. Conventional plate making printing, flexography, lithography, gravure, screen printing, etc. are employed herein.
Specifically, the diffusion agent, the foaming agent and the cracking agent can accelerate the diffusion and the formation of the first printing ink, so that the formation time of the random code is shortened, and the randomness and the complexity of the formed pattern are greatly improved. However, the total consumption is required to be between 2 and 10 percent of the weight of the first ink, and the addition amount exceeding 10 percent can cause incomplete UV curing and even glue overflow and non-molding; the addition amount is less than 2%, and the above-mentioned effects are not achieved. In a specific experiment, the amounts of the dispersing agent, the foaming agent and the cracking agent need to be adjusted according to actual operation requirements, and the invention is not limited to the above. The addition amount of the curing agent determines the molding quality of the final ink, the curing agent can be prepared by mixing one or more than two photoinitiators of 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide (TPO), 1-hydroxy-cyclohexyl-phenyl ketone (184), phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide (819), 2-Isopropyl Thioxanthone (ITX), 2022 and the like, the total amount of the curing agent accounts for 0.5% -5% of the weight of the first ink, and in specific experiments, the types and the combinations of the curing agent can be adjusted according to actual operation requirements, and the invention can also select photoinitiators except the photoinitiators.
The first ink may be dried by an ultraviolet lamp, and the ultraviolet curing device such as a mercury lamp, a halogen lamp, an LED lamp, etc. may be selected to perform ultraviolet curing, as estimated to be required for curing. Specifically, the yellow ink coated on the UV gloss oil is irradiated by an ultraviolet lamp for 2-10 seconds, so that the yellow ink can be completely cured. After the drying is finished, carrying out adhesive force test on the color ink layer (first ink) on the UV gloss oil by adopting an adhesive tape, and if the adhesive force is enough, carrying out subsequent operation; if the adhesive force is insufficient, the content of the curing agent of the color ink can be adjusted until the adhesive force reaches the standard.
Printing a first diffusion coating on the laser layer, printing a first ink layer on the first diffusion coating, and printing a second diffusion coating on the first ink layer. Conventional plate making printing, flexography, lithography, gravure, screen printing, etc. are employed herein. The second diffusion coating is the same as the first diffusion coating in terms of diffusion time and curing conditions and is also consistent with the first diffusion coating.
Printing a second ink (UV blue ink) on the dried second diffusion coating in a mode of one or more of points, lines and surfaces to form the second ink, wherein the second ink flows, splits and foams (can be slight/severe) to form a random shrinkage pattern (random code) on the dried second diffusion coating, and then carrying out UV drying and curing. The second ink remained consistent with the first ink formulation, the only difference being that the ink color changed from yellow to blue, and the second ink layer cured in a process consistent with the first ink layer.
After the drying is finished, carrying out adhesive force test on the color ink layer (second ink) on the UV gloss oil by adopting an adhesive tape, and if the adhesive force is enough, carrying out subsequent operation; if the adhesive force is insufficient, the content of the curing agent of the color ink can be adjusted until the adhesive force reaches the standard. Pulling the UV varnish and the color ink layer (second ink layer) attached on the laser film through the adhesive tape, wherein if the UV varnish and the color ink are pulled to fall off and adhere on the adhesive tape, the adhesive force of the UV varnish is insufficient; if the color ink is pulled to fall off and adhere to the adhesive tape, but the UV gloss oil cannot adhere to the adhesive tape, the adhesive force of the color ink is insufficient, and the adhesive force of the UV gloss oil is sufficient; if the UV varnish and the color ink are pulled, the UV varnish and the color ink cannot fall off and adhere to the adhesive tape, and the adhesive force of the UV varnish and the color ink is enough. And when the UV varnish, the first ink and the second ink are printed, defoaming and leveling treatment on the UV varnish, the first ink and the second ink is not required.
In one embodiment of the invention, the colored ink may be dried using an ultraviolet lamp, which may be a 1500-2000 watt mercury lamp, which is irradiated for 5-6 seconds. The color ink can be black ink, and the pure black ink has poor contractility and poor adhesive force, and the black ink can be prepared by mixing black ink and gloss oil. In order to ensure that the black ink obtains better shrinkage patterns during shrinkage, 2% of crack agents can be added into the black ink, so that the shrinkage effect is enhanced, and the anti-counterfeiting effect is better.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (6)
1. The anti-counterfeiting label is characterized by comprising a laser layer, a transparent first diffusion coating, a first ink layer with random shrinkage graphics and texts, a transparent second diffusion coating and a second ink layer with random shrinkage graphics and texts, wherein the laser layer, the first diffusion coating, the first ink layer, the second diffusion coating and the second ink layer are sequentially distributed; the colors of the laser layer, the first ink layer and the second ink layer are different from each other; the bottom color of the laser layer is silver; the laser layer is a laser paperboard, the first diffusion coating and the second diffusion coating are UV gloss oil layers, and the first ink layer and the second ink layer are UV ink layers; the positions, covered by the first ink layer and/or the second ink layer, on the laser layer represent random codes with various colors, and the positions, uncovered by the first ink layer and/or the second ink layer, on the laser layer represent laser patterns;
The first diffusion coating and the second diffusion coating both comprise UV gloss oil and a diffusion agent, wherein the weight ratio of the diffusion agent is 0.5-2% of the weight of the first diffusion coating, and the weight ratio of the diffusion agent is 0.5-2% of the weight of the second diffusion coating;
The first ink and the second ink each comprise a dispersing agent, a foaming agent, a cracking agent and a curing agent, wherein the total amount of the dispersing agent, the foaming agent and the cracking agent added accounts for 2-5% of the weight of the first ink, the total amount of the dispersing agent, the foaming agent and the cracking agent added accounts for 2-5% of the weight of the second ink, the total amount of the dispersing agent, the foaming agent and the cracking agent added accounts for less than or equal to 5-10% of the weight of the first ink, and the total amount of the dispersing agent, the foaming agent and the cracking agent added accounts for less than or equal to 5-10% of the weight of the second ink; the weight of the curing agent accounts for 0.5-5% of the weight of the first ink, and the weight of the curing agent accounts for 0.5-5% of the weight of the second ink;
the first ink is ultraviolet curing ink, and the first ink is cured through ultraviolet light to form the first ink layer; the second ink is ultraviolet curing ink, and the first ink is cured through ultraviolet light to form the second ink layer.
2. The security tag of claim 1 wherein said first ink layer is yellow and said second ink layer is blue.
3. The preparation method of the anti-counterfeiting label is characterized by comprising the following steps of:
a laser layer is selected, and a transparent first diffusion coating is coated on the laser layer;
Printing a first ink on the first diffusion coating, and forming a first ink layer with random shrinkage graphics and texts after curing;
after the first ink layer is cured, coating a transparent second diffusion coating on the first ink layer;
printing a second printing ink on the second diffusion coating, wherein the second printing ink layer is provided with a random shrinkage image-text formed after solidification; the colors of the laser layer, the first ink layer and the second ink layer are different from each other;
The first diffusion coating and the second diffusion coating both comprise UV gloss oil and a diffusion agent, wherein the weight ratio of the diffusion agent is 0.5-2% of the weight of the first diffusion coating, and the weight ratio of the diffusion agent is 0.5-2% of the weight of the second diffusion coating;
The first ink and the second ink each comprise a dispersing agent, a foaming agent, a cracking agent and a curing agent, wherein the total amount of the dispersing agent, the foaming agent and the cracking agent added accounts for 2-5% of the weight of the first ink, the total amount of the dispersing agent, the foaming agent and the cracking agent added accounts for 2-5% of the weight of the second ink, the total amount of the dispersing agent, the foaming agent and the cracking agent added accounts for less than or equal to 5-10% of the weight of the first ink, and the total amount of the dispersing agent, the foaming agent and the cracking agent added accounts for less than or equal to 5-10% of the weight of the second ink; the weight of the curing agent accounts for 0.5-5% of the weight of the first ink, and the weight of the curing agent accounts for 0.5-5% of the weight of the second ink;
the first ink is ultraviolet curing ink, and the first ink is cured through ultraviolet light to form the first ink layer; the second ink is ultraviolet curing ink, and the first ink is cured through ultraviolet light to form the second ink layer.
4. The method for producing an anti-counterfeit label according to claim 3, wherein in the step of printing a first ink on the first diffusion coating layer and forming a first ink layer having a random shrinkage pattern after curing, the first ink is printed on the first diffusion coating layer in a manner of one or a combination of two or more of dots, lines and faces, and the first ink layer is formed after curing; and printing second ink on the second diffusion coating, and in the step of forming a second ink layer with random shrinkage graphics and texts after curing, printing the second ink on the second diffusion coating in a mode of combining one or more of points, lines and surfaces, and forming a second ink layer after curing.
5. The method for producing an anti-counterfeit label according to any one of claims 3 to 4, wherein,
Printing the first ink on the first diffusion coating before the first diffusion coating is uncured; printing the second ink on the second diffusion coating before the second diffusion coating is uncured.
6. The method of producing an anti-counterfeit label according to any one of claims 3 to 4, wherein the first ink is printed on the first diffusion coating layer after the first diffusion coating layer is cured; printing the second ink on the second diffusion coating after the second diffusion coating is cured.
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| CN201910663886.0A CN110322777B (en) | 2019-07-22 | 2019-07-22 | Anti-counterfeiting label and preparation method thereof |
| GBGB1911142.6A GB201911142D0 (en) | 2019-07-22 | 2019-08-05 | the automatic adjustment method of the humidi-fication amount based on thge humidifier |
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| CN201910663886.0A CN110322777B (en) | 2019-07-22 | 2019-07-22 | Anti-counterfeiting label and preparation method thereof |
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| CN110910750A (en) * | 2019-12-31 | 2020-03-24 | 覃家来 | Three-dimensional anti-counterfeiting marker and anti-counterfeiting method thereof |
| CN111477094B (en) * | 2020-04-07 | 2022-07-26 | 苏州印象镭射科技有限公司 | 3D touch anti-counterfeiting mark with micro-nano textures and manufacturing method thereof |
| CN112927602A (en) * | 2021-03-04 | 2021-06-08 | 深圳市将维可变数据赋码技术有限公司 | Anti-counterfeiting random marker and printing method thereof |
| CN112749773A (en) * | 2021-03-04 | 2021-05-04 | 深圳市将维可变数据赋码技术有限公司 | Anti-counterfeiting random marker anti-counterfeiting method |
| CN114023180A (en) * | 2021-10-19 | 2022-02-08 | 广东德睿新材料科技有限公司 | Easily tear double-deck anti-fake in-mould label |
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| GB201911142D0 (en) | 2019-09-18 |
| CN110322777A (en) | 2019-10-11 |
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