CN111681531B - Optically variable anti-counterfeiting two-dimensional code identifier and preparation method thereof - Google Patents
Optically variable anti-counterfeiting two-dimensional code identifier and preparation method thereof Download PDFInfo
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- CN111681531B CN111681531B CN202010589670.7A CN202010589670A CN111681531B CN 111681531 B CN111681531 B CN 111681531B CN 202010589670 A CN202010589670 A CN 202010589670A CN 111681531 B CN111681531 B CN 111681531B
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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
- G09F3/0297—Forms or constructions including a machine-readable marking, e.g. a bar code
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
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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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Abstract
The invention discloses an optically variable anti-counterfeiting two-dimensional code mark, which comprises an optically variable information layer, a metal reflecting layer, a release layer and a variable information layer which are sequentially stacked, wherein the release layer is positioned between the metal reflecting layer and the variable information layer so as to be convenient for peeling the optically variable information layer and the variable information layer; the metal reflecting layer comprises a hollow-out area and a non-hollow-out area; the variable information layer includes a first variable information area corresponding to a hollowed-out area of the metal reflective layer and a second variable information area corresponding to a non-hollowed-out area of the metal reflective layer. Aiming at the conditions that the current two-dimensional code has single function and the verification code is complex to use, the technical scheme of the invention can obtain the optically variable anti-counterfeiting two-dimensional code identifier which can provide optically variable anti-counterfeiting, verification anti-counterfeiting and two-dimensional code information simultaneously by combining the two-dimensional code, the verification code and the optically variable anti-counterfeiting technology.
Description
Technical Field
The invention belongs to the field of anti-counterfeiting marks, and particularly relates to an optically variable anti-counterfeiting two-dimensional code mark and a preparation method thereof.
Background
The optically variable anti-counterfeiting technology has the characteristics of easy identification, high technological content, easy mass production and difficult copying, and is widely applied to the anti-counterfeiting field in recent years. The prior art optical variable anti-counterfeiting technology comprises holographic anti-counterfeiting technology, sub-wavelength optical variable anti-counterfeiting technology, platinum relief technology and the like. The early holographic anti-counterfeiting technology is a grating effect prepared by interference of two beams of light, and later, the pixel photoetching technology realizes automatic photoetching. The diffraction grating effect of monochrome, homothetic different image, dynamic and the like is expanded to the new optical effects of zero-order diffraction anti-counterfeiting technology, purple light effect, platinum relief, lens reproduction and the like. In recent years, with the higher and higher requirements of anti-counterfeiting technologies, the optically variable anti-counterfeiting technology is widely applied to the aspects of national certificates, cigarette packet packaging and brand protection.
The two-dimensional bar code/two-dimensional code is a pattern which is distributed on a plane (two-dimensional direction) according to a certain rule by using a certain specific geometric figure, is alternate in black and white and records data symbol information; the concept of '0' and '1' bit stream which forms the internal logic base of computer is skillfully utilized in coding, a plurality of geometric shapes corresponding to binary system are used for representing literal numerical information, and the information is automatically read by an image input device or an optoelectronic scanning device so as to realize the automatic processing of the information: it has some commonality of barcode technology: each code system has its specific character set; each character occupies a certain width; has certain checking function and the like. Meanwhile, the method also has the function of automatically identifying information of different rows and processing the graph rotation change points. At present, the two-dimensional code becomes one of the most practical achievements of the current information technology, and the two-dimensional code can play roles in logistics management, traceability, big data management (supply chain management, sales management), anti-counterfeiting and the like.
However, the two-dimensional code cannot be used for product promotion and code scanning verification function alone, so the two-dimensional code is often used in cooperation with a hidden verification code to play an anti-counterfeiting role. The two-dimensional code is used as an entrance of the internet, can give a product code for logistics management, product traceability and big data management. The hidden verification code can be added with other information such as anti-counterfeiting information or promotion information on the basis of the two-dimensional code. Therefore, in the prior art, after the verification code is printed on a label with a common two-dimensional code combined with the verification code, scraping ink is printed on the verification code, and the label is not beautiful, needs to be scraped, and is troublesome and dirty. One common example is to hide the verification code of the commodity under the ink, and after purchasing the commodity, the consumer needs to further scan the two-dimensional code and then input the verification code to obtain the identity information of the commodity. On one hand, the anti-counterfeiting effect of the verification mode is limited, on the other hand, the operation is relatively complicated, and the effect is not ideal in practical use.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides an optically variable anti-counterfeiting two-dimensional code mark and a preparation method thereof, which can at least partially solve the problems. Aiming at the conditions that the current two-dimensional code has single function and the verification code is complex to use, the technical scheme of the invention can obtain the optically variable anti-counterfeiting two-dimensional code identifier which can simultaneously provide optically variable anti-counterfeiting, verification anti-counterfeiting and two-dimensional code information by combining the two-dimensional code, the verification code and the optically variable anti-counterfeiting technology.
In order to achieve the above object, according to one aspect of the present invention, there is provided an optically variable anti-counterfeiting two-dimensional code identifier, comprising an optically variable information layer, a metal reflective layer and a release layer, which are sequentially stacked, and characterized by further comprising a variable information layer, wherein the release layer is located between the metal reflective layer and the variable information layer, so as to facilitate the peeling between the optically variable information layer and the variable information layer;
the optically variable information layer contains optically variable anti-counterfeiting information;
the metal reflecting layer is of a hollow structure and comprises a hollow area and a non-hollow area;
the variable information layer comprises a first variable information area and a second variable information area, wherein the first variable information area corresponds to a hollow-out area of the metal reflecting layer, and the second variable information area corresponds to a non-hollow-out area of the metal reflecting layer;
in this way, the optically variable anti-counterfeiting two-dimensional code mark comprises optically variable anti-counterfeiting information, and can disclose first variable information before the non-hollow-out area of the metal reflecting layer is uncovered through the release layer, and disclose second variable information after the non-hollow-out area of the metal reflecting layer is uncovered.
Preferably, the release layer comprises a first release layer and a second release layer, the first release layer is attached to the metal reflecting layer, and the second release layer is used for assisting in film formation, so that the optically variable anti-counterfeiting mark and the marker are easy to peel.
As a preferable preference of the technical solution of the present invention, the second release layer is a resin type release agent.
Preferably, the first release layer is a wax release agent.
As a preferred preference of the technical scheme of the present invention, the first variable information is a two-dimensional code; the second variable information is a verification code.
According to one aspect of the invention, there is provided a method for preparing an optically variable anti-counterfeiting two-dimensional code mark according to any one of claims 1 to 5, which comprises the following steps,
s1, coating a layer of acrylic resin coating on the substrate layer and embossing to form an optically variable information layer;
s2, preparing a hollowed-out metal reflecting layer on the optically variable information layer to form a hollowed-out area and a non-hollowed-out area of the metal reflecting layer;
s3, coating a release layer on the metal reflecting layer, wherein the release layer comprises a first release layer and/or a second release layer;
s5, preparing a variable information layer on the release layer, wherein the variable information layer comprises a first variable information area and/or a second variable information area, the first variable information area corresponds to the hollow-out area of the metal reflection layer, and the second variable information area corresponds to the non-hollow-out area of the metal reflection layer;
s6, preparing a back glue layer on the variable information layer to form the optically variable anti-counterfeiting two-dimensional code mark as claimed in any one of claims 1 to 5.
Preferably, the first release layer is attached to the metal reflective layer, and the second release layer is used for auxiliary film formation, so that the optically variable anti-counterfeiting mark and the marker are easy to peel off.
As a preferable preference of the technical solution of the present invention, the second release layer is a resin type release agent.
Preferably, the first release layer is a wax release agent.
As a preferred preference of the technical scheme of the present invention, the first variable information is a two-dimensional code; the second variable information is a verification code.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
1) according to the technical scheme, the optical variable anti-counterfeiting technology and the two-dimensional code are combined together, one-time ink jet printing is realized through ingenious structural design, the two-dimensional code is associated with the verification code, the two-dimensional code is in a visible state, and the verification code is hidden;
2) according to the technical scheme, the hollow effect of the metal reflecting layer in the prior art is combined with the use requirements of the two-dimensional code and the verification code, so that the optically variable anti-counterfeiting mark can scan the two-dimensional code through the hollow area of the metal reflecting layer to obtain corresponding information before being uncovered, verification code information hidden in the non-hollow area of the metal reflecting layer can be further obtained after being uncovered, and the work of tracing the information of the mark, anti-counterfeiting verification and the like is greatly simplified;
3) according to the technical scheme, the anti-counterfeiting mode of combining the optically variable anti-counterfeiting information with the two-dimensional code and the verification code is adopted, and in order to ensure the integrity of the two-dimensional code and the verification code information, the release layer is particularly designed in a double-layer mode, wherein one layer is used for stripping the base material layer, the optically variable information layer, the metal reflecting layer and the like, and the other layer is used for ensuring the integrity of the variable information layer (containing the two-dimensional code and the verification code information), so that the reliability of the optically variable anti-counterfeiting two-dimensional code mark of the technical scheme is improved.
Drawings
Fig. 1 is a structural cross-sectional view of an optically variable anti-counterfeiting two-dimensional code identifier according to an embodiment of the technical solution of the present invention;
fig. 2 is an effect diagram of the optical variable anti-counterfeiting two-dimensional code before and after the mark is uncovered according to the embodiment of the technical scheme of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to specific embodiments.
The embodiment of the technical scheme of the invention provides an optically variable anti-counterfeiting two-dimensional code mark which can verify the information of a mark by uncovering and a preparation method thereof. This is illustrated below with reference to specific examples.
As shown in fig. 1, the invention is a cross-sectional view of a structure of an unverified and verified optically variable anti-counterfeiting two-dimensional code identifier. The optically variable anti-counterfeiting two-dimensional code mark comprises a substrate layer 1, an optically variable image layer 2, a metal reflecting layer 3, a release layer 4, a variable information layer 5 and a back glue layer 6 which are sequentially stacked from outside to inside.
The substrate layer 1 can adopt various conventional thin film materials suitable for processing laser holographic patterns, such as PET biaxial stretching films and the like, is a supporting structure of the whole optical variable anti-counterfeiting mark two-dimensional code mark, and plays a role in covering and protecting the whole optical variable anti-counterfeiting mark two-dimensional code mark. Generally, the substrate layer is preferably a transparent structure so as to obtain information content in the other layer structure of the optically variable anti-counterfeiting mark two-dimensional code mark through the layer structure.
The optically variable image layer 2 is attached to the substrate layer, and is a carrier of the optically variable anti-counterfeiting information in the embodiment, and in the embodiment, one or more optically variable anti-counterfeiting patterns are arranged on one side of the optically variable image layer, which is far away from the substrate layer 1. Under the action of the metal reflecting layer 3, the optically variable anti-counterfeiting pattern can present the visual effects of monochromatic, dynamic, orthotopic, different images, depth, holographic lens, purple light based on diffraction, cat eye based on reflection, platinum relief, zero-order diffraction, nano-optics and the like, and form certain information expression. In the preparation process of the optically variable anti-counterfeiting two-dimensional code, the optically variable anti-counterfeiting two-dimensional code can be used for providing basic information including manufacturers, brand marks and the like, and can also be used for making information for prompting consumers to reveal and verify the authenticity of the marker commodities.
The metal reflecting layer 3 is arranged on one side of the optically variable image layer 2, which is far away from the substrate layer 1, and is attached to the optically variable image layer 2. In the present embodiment, the metal reflective layer 3 preferably adopts a local aluminum plating effect to form the non-aluminum plated region 31 and the aluminum plated region 32 in fig. 1. For convenience of description, in this embodiment, the region coated with metal is referred to as a non-hollow region, and the region without metal is referred to as a hollow region. Since the OD of the aluminized region is greater than 1.0, light cannot pass through the aluminized region. When the optically variable anti-counterfeiting mark is used, after light enters, reflection is formed on an interface between the aluminum plating area 32 and the optically variable pattern layer 2, so that an optically variable image can be displayed. While the area 31 that is not aluminized is transparent, light can be transmitted through the area to view information on other layers or markers.
In this embodiment, the metal reflective layer 3 may be prepared by one or more of a water washing process, an alkali washing process, and a hollow plating process. Taking an aluminum layer as an example, the aluminum washing process is to print water washing ink on the non-aluminum-plated area of the optically variable image layer 2, then fully plate a layer of aluminum, and then remove the water washing ink and the aluminum layer on the surface thereof by water washing, thereby obtaining the non-aluminum-plated area 31. While the areas where the water-washed ink is not printed, the aluminum layer remains, i.e., the aluminum-plated areas 32. The alkaline aluminum washing process is to perform full vacuum aluminum plating on the optically variable image layer 2, coat a protective layer on the area (aluminum plating area) where the aluminum layer needs to be reserved, then immerse the area into alkali liquor, remove the aluminum without the protective layer through reaction to obtain a non-aluminum plating area 31, and reserve the aluminum layer in the area with the protective layer to form an aluminum plating area 32. In this embodiment, the material and the preparation process of the metal reflective layer are not specifically limited, and other technical solutions capable of forming the effect of the local metal plating layer are also within the protection scope of the present application.
In this embodiment, from type layer 4 setting between variable information layer 5 and metal reflection stratum 3, from the setting on type layer 4 can let light become anti-fake label easily to reveal, simultaneously, reveal from type layer 4 back, this light becomes anti-fake label promptly inefficacy. In this embodiment, the release layer 4 preferably has a double-layer release layer, wherein the first layer is attached to the metal reflective layer 3 and is a wax-based release agent, and the wax-based release agent of this embodiment may be one or more of paraffin, microcrystalline wax, carnauba wax, montan wax, polyethylene wax, and the like. The second layer is preferably a resin type release agent, and can be cellulose acetate butyrate or cellulose acetate and a mixture of the cellulose acetate butyrate and the cellulose acetate and acrylic resin. In this embodiment, the second layer not only plays a release role, but also can play a film forming role, so that the optically variable anti-counterfeiting mark and the marker can be peeled off cleanly, and the release layer structure is suitable for digital printing, so as to facilitate the preparation of the variable information layer 5. Further, the release layer of the present embodiment may also be a single-layer structure capable of implementing the above-described functions.
In this embodiment, the variable information layer 5 may be directly prepared on the release layer 4 by humorous printing or digital printing. Specifically, the variable information layer 5 of the present embodiment includes two areas, one area is a first variable information area, information of which is directly disclosed to the outside and corresponds to the hollow area of the metal reflective layer 3, and the other area is a second variable information area, information of which can be used to further verify the marker, etc., and corresponds to the non-hollow area of the metal reflective layer 3. In this embodiment, the information of one area is two-dimensional code information, which is used as an entrance of the internet of things, and the information can perform functions such as logistics management, product traceability and big data analysis, and specifically, the area 51 is located below the non-aluminized area 31 and can be directly observed. Another area 52 is located beneath the metallized area 32 and contains information primarily authentication information that is obscured from view from the front of the sign by the metal reflective layer before the sign is revealed.
The back glue layer 6 is attached to the variable information layer 5 and used for attaching the optically variable anti-counterfeiting mark to the surface of the marker. In this embodiment, in order to improve the readability of the optically variable anti-counterfeiting mark information, the back adhesive layer 6 may select a corresponding adhesive layer according to the color characteristics of the mark itself. For example, when the object to be pasted is a white or light-colored object, the back adhesive layer may be a transparent adhesive, or may be a white opaque adhesive. When the object to be pasted is a dark object, in order to improve the readability of the variable information, the back adhesive layer is white opaque adhesive, and a substrate layer can be additionally arranged between the variable information layer and the back adhesive layer and is white.
To sum up, the optically variable anti-counterfeiting mark of this application becomes the image layer 2, metal reflection stratum 3, from type layer 4, variable information layer 5 including substrate layer 1, the optically variable that the range upon range of setting, and gum layer 6 is used for laminating above-mentioned optically variable anti-counterfeiting mark to the marker surface.
In a specific embodiment, when in use, the two-dimensional code and the hologram can be seen from the front observation of the optically variable anti-counterfeiting mark, as shown in fig. 2. The two-dimension code can be used for logistics management, traceability and big data analysis of an enterprise on commodities, and meanwhile, the holographic identification has the functions of attractiveness and anti-counterfeiting. After the mark is uncovered, verification code information can be seen below the holographic area, and the verification code information can endow functions of enterprise marketing, anti-counterfeiting authentication, membership integration, consumer management and the like. The invention can realize the association of the hologram and the two-dimensional code through one-time printing by ingenious design, and compared with the existing two-dimensional code scheme, the invention has simpler process and is more practical.
The optically variable anti-counterfeiting mark according to the technical scheme of the invention is further described by combining a preferred preparation process of the patterned aluminized holographic anti-counterfeiting mark of the invention:
(1) taking a BOPET film of 30 microns as a base material film to obtain a base material layer 1;
(2) the substrate layer 1 is subjected to corona to increase the surface tension. Then coating an acrylic resin coating layer through a gravure, wherein the thickness of the resin layer is 1.5 microns, the coating temperature is 80-120 ℃, and the speed is 60-90 m/min;
(3) using a nano-imprinting machine to imprint the holographic pattern on the metal nickel master plate on the acrylic resin coating under the action of heat and pressure at 160-240 ℃ to form an optically variable image layer 2;
(4) and printing water washing ink on a predetermined non-aluminized area on the optically variable image layer. Then vacuum aluminizing is carried out on the full plate, and finally, the water washing ink and the aluminum layer are removed by cleaning with clear water, so that the partially aluminized metal reflecting layer 3 is obtained;
(5) taking oxidized polyethylene wax as a release agent, coating a first layer of release agent on the metal reflecting layer by gravure coating, and then coating a layer of resin type coating on the surface of the metal reflecting layer to form a release layer 4;
(6) printing variable information on the release layer 4 by ink jet printing, wherein the variable information is divided into two-dimensional codes and verification codes, the two-dimensional codes are located in the areas without the aluminum layers, and the verification codes are located in the areas with the aluminum layers;
(7) coating a pressure-sensitive adhesive on the variable information layer by adopting a hot melt adhesive coating mode, and compounding the pressure-sensitive adhesive on release paper; then die cutting and splitting are carried out, and the optical variable anti-counterfeiting two-dimensional code mark which is uncovered and verified is obtained;
finally, the mark can be attached to the surface of an outer package in the process of packaging the commodity, the commodity is endowed with the function of one product and one code, and enterprises or merchants can perform product tracking and tracing, logistics management, sales promotion and big data analysis according to the two-dimensional codes. After the consumer takes the commodity, the commodity can be linked to the two-dimensional code data background through code scanning, then the identification is uncovered, and the verification code is input for lottery drawing inquiry, point counting and the like.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. An optically variable anti-counterfeiting two-dimensional code mark comprises an optically variable information layer, a metal reflecting layer and a release layer which are sequentially stacked, and is characterized by further comprising a variable information layer, wherein the release layer is positioned between the metal reflecting layer and the variable information layer so as to be convenient for the optically variable information layer and the variable information layer to be peeled off;
the optically variable information layer contains optically variable anti-counterfeiting information;
the metal reflecting layer is of a hollow structure and comprises a hollow area and a non-hollow area;
the variable information layer comprises a first variable information area and a second variable information area, wherein the first variable information area corresponds to a hollow-out area of the metal reflecting layer, and the second variable information area corresponds to a non-hollow-out area of the metal reflecting layer;
in this way, the optically variable anti-counterfeiting two-dimensional code mark comprises optically variable anti-counterfeiting information, and can disclose first variable information before the non-hollow-out area of the metal reflecting layer is uncovered through the release layer, and disclose second variable information after the non-hollow-out area of the metal reflecting layer is uncovered;
the release layer comprises a first release layer and a second release layer, the first release layer is attached to the metal reflecting layer, and the second release layer is used for assisting in film formation, so that the optically variable anti-counterfeiting mark and the marker are easy to peel.
2. The optically variable anti-counterfeiting two-dimensional code label according to claim 1, wherein the second release layer is a resin type release agent.
3. The optically variable anti-counterfeiting two-dimensional code label according to claim 1, wherein the first release layer is a wax release agent.
4. The optically variable anti-counterfeiting two-dimensional code mark according to any one of claims 1 to 2, wherein the first variable information is a two-dimensional code; the second variable information is a verification code.
5. A method for preparing the optically variable anti-counterfeiting two-dimensional code mark according to any one of claims 1 to 4, which comprises the following steps,
s1, coating a layer of acrylic resin coating on the substrate layer and embossing to form an optically variable information layer;
s2, preparing a hollowed-out metal reflecting layer on the optically variable information layer to form a hollowed-out area and a non-hollowed-out area of the metal reflecting layer;
s3, coating a release layer on the metal reflecting layer, wherein the release layer comprises a first release layer and/or a second release layer;
s5, preparing a variable information layer on the release layer, wherein the variable information layer comprises a first variable information area and/or a second variable information area, the first variable information area corresponds to the hollow-out area of the metal reflection layer, and the second variable information area corresponds to the non-hollow-out area of the metal reflection layer;
s6, preparing a back glue layer on the variable information layer to form the optically variable anti-counterfeiting two-dimensional code mark according to any one of claims 1 to 4; the first release layer is attached to the metal reflecting layer, and the second release layer is used for assisting in film forming, so that the optically variable anti-counterfeiting mark and the marker are easy to peel.
6. The method for preparing the optically variable anti-counterfeiting two-dimensional code mark according to claim 5, wherein the second release layer is a resin type release agent.
7. The method for preparing the optically variable anti-counterfeiting two-dimensional code mark according to claim 5, wherein the first release layer is a wax release agent.
8. The method for preparing the optically variable anti-counterfeiting two-dimensional code mark according to any one of claims 5 to 7, wherein the first variable information is a two-dimensional code; the second variable information is a verification code.
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| CN115384209B (en) * | 2022-09-30 | 2023-08-25 | 山东泰宝信息科技集团有限公司 | Invisible intelligent anti-counterfeiting electrochemical aluminum, preparation method and application thereof |
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| CN106023789B (en) * | 2016-05-11 | 2019-06-18 | 湖北华工图像技术开发有限公司 | A kind of tamper-evident mark and preparation method thereof having both laser hologram mark and two dimensional code |
| CN206021781U (en) * | 2016-08-31 | 2017-03-15 | 河南省卫群科技发展有限公司 | Multilamellar dynamic can review Quick Response Code hot-stamping mark and system |
| CN109949695A (en) * | 2019-04-28 | 2019-06-28 | 山东泰宝防伪技术产品有限公司 | Rariable local holography logic corresponding informance anti-counterfeiting mark and preparation method thereof |
| CN110176183A (en) * | 2019-06-26 | 2019-08-27 | 山东泰宝防伪技术产品有限公司 | Positioning, which is taken off, engraves multiple anti-counterfeit label and preparation method thereof |
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