Naked-eye stereoscopic holographic anti-counterfeiting label and preparation method thereof

Abstract

The present application belongs to the field of anti-counterfeiting technology, and particularly relates to a naked-eye three-dimensional holographic anti-counterfeiting label and a preparation method thereof. The naked-eye three-dimensional holographic anti-counterfeiting label provided by the present application comprises, from top to bottom, a first digital information layer, a holographic anti-counterfeiting first film layer, a naked-eye three-dimensional second film layer, a hidden verification information layer, an adhesive layer and a silicone oil paper layer. The naked-eye three-dimensional second film layer presents a naked-eye three-dimensional visual effect, which can be observed without any auxiliary equipment, greatly improving the recognition and visual appeal of the anti-counterfeiting material. The one-to-one correspondence between the first digital information layer and the hidden verification information layer further enhances the anti-counterfeiting performance of the anti-counterfeiting label. Uncovering the leaving unit directly destroys the microstructure of the three-dimensional information layer, the naked-eye three-dimensional visual effect disappears, and the anti-counterfeiting label cannot be restored, reducing the risk of counterfeiting and repeated use of the anti-counterfeiting label.

Description

Technical Field

[0001] This invention belongs to the field of anti-counterfeiting technology, specifically relating to a naked-eye three-dimensional holographic anti-counterfeiting label and its preparation method. Background Technology

[0002] Anti-counterfeiting labels are markings affixed to products to verify their authenticity and prevent counterfeiting and unauthorized reproduction. They are typically designed and manufactured by professional anti-counterfeiting technology companies and are linked to specific product information, providing consumers and businesses with reliable anti-counterfeiting evidence.

[0003] Anti-counterfeiting labels come in various types, and in terms of anti-counterfeiting technology, they are divided into physical anti-counterfeiting and digital anti-counterfeiting. Physical anti-counterfeiting refers to using special materials, printing processes, and markings to improve the product's recognizability and anti-counterfeiting capabilities. For example, special inks, watermarks, and microtext are used. Digital anti-counterfeiting, on the other hand, uses advanced digital technology to assign a unique code to each product and bind this code to the company's product information. Consumers can verify the authenticity of a product by entering the code via telephone, SMS, or the internet.

[0004] Holographic anti-counterfeiting labels are a type of anti-counterfeiting label made using laser holography technology. They combine the optical properties of holograms with printing technology to provide a highly secure anti-counterfeiting solution. Due to their unique visual effects and difficulty in counterfeiting, holographic anti-counterfeiting labels are widely used in various industries. The foundation of holographic anti-counterfeiting technology is laser holography, an optical technology that uses lasers to record information about the surface of an object. A hologram records the interference pattern of an object; when light passes through these patterns, diffraction occurs, thus reproducing a three-dimensional image of the object. Holographic anti-counterfeiting labels can display dynamically changing images and colors, which present different visual effects under different angles and lighting conditions. The production of holograms requires specialized equipment and technology, making counterfeiting difficult.

[0005] CN107154213B discloses an intelligent random feature recognition anti-counterfeiting label and its preparation method, comprising, from top to bottom, a heat-shrinkable film layer, an adhesive layer, an ink protective layer, a printing layer, a transfer adhesive layer, a water-soluble film layer, a fragile film layer, a pressure-sensitive adhesive layer, and a silicone paper layer. The anti-counterfeiting label is tearable, consisting of a peelable portion and a retainable portion. The peelable portion, from top to bottom, comprises the heat-shrinkable film layer, adhesive layer, ink protective layer, printing layer, transfer adhesive layer, and water-soluble film layer; the retainable portion, from top to bottom, comprises an anti-counterfeiting sheet, a fragile film layer, a pressure-sensitive adhesive layer, and a silicone paper layer. This technical solution provides a way to prevent secondary transfer of the label through the peelable and retainable portions. However, consumers cannot easily distinguish between genuine and counterfeit labels with the naked eye. Traditional single holographic anti-counterfeiting technology products or the aforementioned solutions that improve anti-counterfeiting performance through peeling are no longer sufficient to meet the market's demand for high-security anti-counterfeiting levels. Therefore, developing a new, difficult-to-counterfeit, and easily identifiable anti-counterfeiting technology product is particularly important. Summary of the Invention

[0006] To address the issues of limited anti-counterfeiting methods and low security in existing anti-counterfeiting labels, this invention provides a naked-eye 3D holographic anti-counterfeiting label. By combining naked-eye 3D and holographic anti-counterfeiting technologies, the resulting anti-counterfeiting label is difficult to counterfeit and can be easily identified by the human eye.

[0007] This invention provides a naked-eye 3D holographic anti-counterfeiting label, comprising, from top to bottom, a first digital information layer, a holographic anti-counterfeiting first film layer, a naked-eye 3D second film layer, a hidden verification information layer, an adhesive layer, and a silicone paper layer; the first digital information layer and the hidden verification information layer have a one-to-one correspondence. The holographic anti-counterfeiting first film layer comprises, from top to bottom, a first transparent base layer, a holographic anti-counterfeiting layer, and a first aluminum-plated layer, wherein the first aluminum-plated layer has a transparent aluminum window; the naked-eye 3D second film layer comprises, from top to bottom, an imaging unit layer, a second transparent base layer, and a 3D information layer, wherein the 3D information layer is separable from the second transparent base layer.

[0008] Furthermore, the naked-eye 3D holographic anti-counterfeiting label includes a verification unit and a departure unit. The verification unit includes a 3D information layer, a hidden verification information layer, and an adhesive layer. The departure unit includes a first digital information layer, a first holographic anti-counterfeiting film layer, an imaging unit layer, and a second transparent base layer. The verification unit is adhered to the packaging through the adhesive layer. The departure unit separates from the verification unit during use, and no naked-eye 3D effect can be observed on the departure unit. The verification unit on the packaging also does not have a naked-eye 3D effect. Because the 3D microstructure of the 3D information layer is damaged when the label is peeled off, even if the departure unit is reattached to the verification unit, no naked-eye 3D effect can be observed.

[0009] Furthermore, the imaging unit layer is composed of micro-refractive units with a diameter of 40-70 micrometers. These micro-refractive units are uniform in size and arranged in a matrix or honeycomb pattern. The second transparent substrate is a PET film or BOPP film with a thickness between 10-30 micrometers, preferably 18-25 micrometers. It serves as a carrier, located below the imaging unit layer, providing necessary support and light transmission properties. The three-dimensional information layer, located below the second transparent substrate, is composed of micro-patterns that are invisible to the naked eye without the aid of other tools. Patterns can be added to the surface of the three-dimensional information layer using techniques such as offset printing and flexographic printing.

[0010] Furthermore, the holographic anti-counterfeiting first film layer and the naked-eye stereoscopic second film layer are positioned and composited by adhesive. After composite, the naked-eye stereoscopic effect of the naked-eye stereoscopic second film layer can be observed through the transparent aluminum window of the holographic anti-counterfeiting first film layer, with a depth of field effect of 1-5mm, but the information of the hidden verification information layer is not visible.

[0011] Furthermore, the holographic anti-counterfeiting layer contains one or more microscopic identification holographic anti-counterfeiting information, including holographic point light source encryption technology, dual-channel technology, and micro-images; the first digital information layer contains variable QR code information, and the hidden verification information layer contains verification information, which is composed of one or more of numbers, letters, graphics, and musical notes.

[0012] This invention provides a method for preparing a naked-eye stereoscopic holographic anti-counterfeiting label, comprising the following steps:

[0013] S1. The first transparent base layer is prepared by coating machine, molding machine, aluminum plating machine, aluminum washing machine and printing machine to prepare the first holographic anti-counterfeiting film layer and the first digital information layer.

[0014] S2. The second transparent base layer is prepared by using a molding machine and a printing machine to create a naked-eye stereoscopic second film layer and a hidden verification information layer.

[0015] S3. Use a coating machine to form an adhesive layer, and position and composite the holographic anti-counterfeiting first film layer, the naked-eye three-dimensional second film layer, and the silicone paper layer.

[0016] S4. Use a die-cutting machine to perform die-cutting and waste removal to obtain naked-eye 3D holographic anti-counterfeiting labels.

[0017] Furthermore, in step S1, the molding machine, aluminum plating machine, and aluminum washing machine are used to form a holographic anti-counterfeiting layer and a first aluminum plating layer with a transparent aluminum washing window, and the printing machine is used to form a first digital information layer.

[0018] Furthermore, in step S2, the molding machine is used to form the imaging unit layer and the stereoscopic information layer of the naked-eye stereoscopic second film layer, and the printing machine is used to form the hidden verification information layer.

[0019] Furthermore, a pressure-sensitive adhesive coating is applied to the naked-eye stereoscopic second film layer and the hidden verification digital information layer. After the solvent evaporates, a pressure-sensitive adhesive layer is formed. The holographic anti-counterfeiting first film layer and the naked-eye stereoscopic second film layer are positioned composites. The transparent aluminum window of the holographic anti-counterfeiting first film layer and the imaging unit element of the naked-eye stereoscopic second film layer are positioned composites. The non-transparent aluminum-plated layer of the holographic anti-counterfeiting first film layer covers the non-imaging unit element area of ​​the naked-eye stereoscopic second film layer and the hidden verification digital information area below the second film layer.

[0020] Furthermore, the stereoscopic image on the label can be viewed by the naked eye without the aid of any external tools.

[0021] The naked-eye 3D holographic anti-counterfeiting label has three anti-counterfeiting identification methods: the first is to visually identify the anti-counterfeiting label by observing the naked-eye 3D effect on the surface of the label; the second is to use a specific tool to observe the holographic anti-counterfeiting information of the holographic anti-counterfeiting layer for microscopic identification; the third is to use a mobile phone to scan the variable QR code information on the first digital information layer, and after peeling off the departure unit, verify the anti-counterfeiting information of the hidden verification information layer.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. This invention provides a naked-eye 3D holographic anti-counterfeiting label, comprising a naked-eye 3D second film layer. Through the ingenious combination of a unique 3D information layer and an imaging unit layer, the material can directly present a naked-eye 3D visual effect, which can be observed without any auxiliary equipment, greatly enhancing the recognizability and visual appeal of the anti-counterfeiting material. This intuitive naked-eye 3D effect is not only difficult to replicate but also effectively distinguishes between genuine and counterfeit products, enhancing the anti-counterfeiting performance and market competitiveness of the product. The 3D information layer has separability from the second transparent base layer. In use, the 3D information layer and the hidden verification information layer are adhered to the packaging through an adhesive layer. The second transparent base layer separates from the 3D information layer, and the naked-eye 3D effect is not visible on the departure unit. The verification unit on the packaging also does not have a naked-eye 3D effect. Because the 3D microstructure of the 3D information layer is destroyed when it is peeled off, even if the departure unit is re-covered on the verification unit, the naked-eye 3D effect cannot be observed, preventing the illegal transfer of the label. Consumers can also judge the product condition by observing whether the label is intact.

[0024] 2. The present invention provides a naked-eye three-dimensional holographic anti-counterfeiting label, including a holographic anti-counterfeiting first film layer. The holographic anti-counterfeiting first film layer has one or more microscopic identification holographic anti-counterfeiting technologies, such as point light source encryption technology, dual-channel technology, and micro-image, and can be microscopically identified by observing the holographic anti-counterfeiting information of the holographic anti-counterfeiting layer using tools such as flashlights or magnifying glasses.

[0025] 3. The present invention provides a naked-eye stereoscopic holographic anti-counterfeiting label, which includes a first digital information layer and a hidden verification information layer. The first digital information layer and the hidden verification information layer have a one-to-one correspondence. After scanning the variable QR code information on the first digital information layer with a mobile phone and revealing the departure unit, the anti-counterfeiting information of the hidden verification information layer is verified, which further enhances the reliability of the anti-counterfeiting label. Attached Figure Description

[0026] Figure 1 This is a cross-sectional structural diagram of a naked-eye 3D holographic anti-counterfeiting label.

[0027] In the picture:

[0028] 1. First digital information layer;

[0029] 2. Holographic anti-counterfeiting first layer;

[0030] 201. The first transparent grassroots level;

[0031] 202. Holographic anti-counterfeiting layer;

[0032] 203. First aluminum plating layer;

[0033] 3. Naked-eye three-dimensional second membrane layer;

[0034] 301. Imaging unit layer;

[0035] 302. Second transparent base layer;

[0036] 303. Three-dimensional information layer;

[0037] 4. Hide the verification information layer;

[0038] 5. Adhesive layer;

[0039] 6. Silicone paper layer. Detailed Implementation

[0040] To more clearly and explicitly illustrate the specific objectives and implementation methods of this invention, a complete description of the technical solution of this invention will be provided below. The described embodiments are only a part of the embodiments of this invention, not all of them. Without creative effort, all other embodiments based on the embodiments described in this invention are within the protection scope of this invention.

[0041] Example 1

[0042] like Figure 1 As shown, a method for preparing a naked-eye 3D holographic anti-counterfeiting label includes the following steps:

[0043] S1. A 20-micron-thick PET film is selected as the first transparent base layer 201. Corona treatment is applied to achieve a surface tension of over 40 dynes to ensure good adhesion of subsequent coatings and plating. A holographic anti-counterfeiting first film layer 2 and a first digital information layer 1 are prepared on the first transparent base layer 201 using a coating machine, a molding machine, an aluminum plating machine, an aluminum washing machine, and a printing machine. Specifically, the coating machine applies a laser information layer coating; the molding machine uses a nickel plate with holographic anti-counterfeiting information for molding, replicating and imprinting the holographic anti-counterfeiting layer 202 onto the laser information layer coating; the aluminum plating machine and aluminum washing machine form a first aluminum plating layer 203 with a transparent aluminum plating window; and the printing machine prints QR code information on the first transparent base layer 201 to form the first digital information layer 1.

[0044] S2. A 20-micron thick PET film is selected as the second transparent base layer 302. A naked-eye stereoscopic second film layer 3 and a hidden verification information layer 4 are prepared sequentially using a molding machine and a printing machine. An imaging unit layer 301 and a stereoscopic information layer 303 that can be separated from the second transparent base layer 302 are formed on the second transparent base layer 302 using a molding machine to obtain the naked-eye stereoscopic second film layer 3. Hidden verification information is printed on the naked-eye stereoscopic second film layer 3 using a printing machine to obtain the hidden verification information layer 4. The hidden verification information and the naked-eye stereoscopic information have a positioning printing relationship, and the registration deviation between the hidden verification information and the naked-eye stereoscopic information is less than 0.5 mm. The hidden verification information consists of random numbers.

[0045] S3. Apply acrylic pressure-sensitive adhesive to both sides of the naked-eye stereoscopic second film layer 3 using a coating machine, and position and composite the holographic anti-counterfeiting first film layer 2 and the silicone paper layer 6, so that the transparent aluminum-plated window of the holographic anti-counterfeiting first film layer 2 and the naked-eye stereoscopic information are positioned and composited together, with the registration deviation between the transparent aluminum-plated window and the naked-eye stereoscopic information being less than 0.5mm. Associate and verify the first digital information of the holographic anti-counterfeiting first film layer 2 and the hidden verification information under the naked-eye stereoscopic second film layer 3 to avoid misalignment.

[0046] S4. Use a die-cutting machine to perform die-cutting and waste removal to obtain naked-eye 3D holographic anti-counterfeiting labels.

[0047] Example 2

[0048] A method for preparing a naked-eye 3D holographic anti-counterfeiting label includes the following steps:

[0049] S1. A 30-micron-thick BOPP film is selected as the first transparent base layer 201. Corona treatment is applied to achieve a surface tension of over 40 dynes to ensure good adhesion of subsequent coatings and plating. A holographic anti-counterfeiting first film layer 2 and a first digital information layer 1 are prepared on the first transparent base layer 201 using a coating machine, a molding machine, an aluminum plating machine, an aluminum washing machine, and a printing machine in sequence. The coating machine and molding machine are connected to obtain a holographic anti-counterfeiting layer 202, where the holographic anti-counterfeiting information consists of encrypted letters and the micro-letters "TB" using a point light source. An aluminum plating machine and an aluminum washing machine are used to form a first aluminum plating layer 203 with a perforated aluminum plating window, resulting in the holographic anti-counterfeiting first film layer 2. A variable QR code is printed on the first transparent base layer 201 of the holographic anti-counterfeiting first film layer 2 using a coding printer to form the first digital information layer 1.

[0050] S2. A 30-micron-thick PET film is selected as the second transparent base layer 302. A naked-eye stereoscopic second film layer 3 and a hidden verification information layer 4 are prepared sequentially using a molding machine, a Founder digital printing machine, and a flexographic printing machine. An imaging unit layer 301 and a stereoscopic information layer 303, separable from the second transparent base layer 302, are formed on the second transparent base layer 302 using the molding machine, ultimately obtaining the naked-eye stereoscopic second film layer 3. Hidden verification information is printed on the naked-eye stereoscopic second film layer 3 using the Founder digital printing machine to obtain the hidden verification information layer 4. The positions of the hidden verification information and the naked-eye stereoscopic information are fixed, and the registration deviation between the hidden verification information and the naked-eye stereoscopic information is less than 0.5 mm. The hidden verification information consists of random letters. A transparent yellow is printed on the hidden verification information layer 4 using a flexographic printing machine.

[0051] S3. Apply acrylic pressure-sensitive adhesive to both sides of the naked-eye stereoscopic second film layer 3 using a coating machine, and position and composite the holographic anti-counterfeiting first film layer 2 and the silicone paper layer 6, so that the transparent aluminum-plated window of the holographic anti-counterfeiting first film layer 2 and the naked-eye stereoscopic information are positioned and composited together, and the registration deviation between the transparent aluminum-plated window and the naked-eye stereoscopic information is less than 0.5mm. The first digital information of the holographic anti-counterfeiting first film layer 2 and the hidden verification information under the naked-eye stereoscopic second film layer 3 are correlated and verified to avoid misalignment.

[0052] S4. Use a die-cutting machine to perform die-cutting and waste removal to obtain naked-eye 3D holographic anti-counterfeiting labels.

[0053] Example 3

[0054] A method for preparing a naked-eye 3D holographic anti-counterfeiting label includes the following steps:

[0055] S1. A 10-micron-thick BOPP film is selected as the first transparent base layer 201. Corona treatment is applied to achieve a surface tension of over 40 dynes to ensure good adhesion of subsequent coatings and plating. A holographic anti-counterfeiting first film layer 2 and a first digital information layer 1 are prepared on the first transparent base layer 201 using a coating machine, a molding machine, an aluminum plating machine, an aluminum washing machine, and a printing machine in sequence. The coating machine and molding machine are connected to obtain a holographic anti-counterfeiting layer 202, where the holographic anti-counterfeiting information consists of encrypted letters and the micro-letters "TB" using a point light source. An aluminum plating machine and an aluminum washing machine are used to form a first aluminum plating layer 203 with a perforated aluminum plating window, resulting in the holographic anti-counterfeiting first film layer 2. A variable QR code is printed on the first transparent base layer 201 of the holographic anti-counterfeiting first film layer 2 using a coding printer to form the first digital information layer 1.

[0056] S2. A 30-micron-thick PET film is selected as the second transparent base layer 302. A naked-eye stereoscopic second film layer 3 and a hidden verification information layer 4 are prepared sequentially using a molding machine, a Founder digital printing machine, and a flexographic printing machine. An imaging unit layer 301 and a stereoscopic information layer 303, separable from the second transparent base layer 302, are formed on the second transparent base layer 302 using the molding machine, ultimately obtaining the naked-eye stereoscopic second film layer 3. Hidden verification information is printed on the naked-eye stereoscopic second film layer 3 using the Founder digital printing machine to obtain the hidden verification information layer 4. The positions of the hidden verification information and the naked-eye stereoscopic information are fixed, and the registration deviation between the hidden verification information and the naked-eye stereoscopic information is less than 0.5 mm. The hidden verification information consists of random letters. A transparent yellow is printed on the hidden verification information layer 4 using a flexographic printing machine.

[0057] S3. Apply acrylic pressure-sensitive adhesive to both sides of the naked-eye stereoscopic second film layer 3 using a coating machine, and position and composite the holographic anti-counterfeiting first film layer 2 and the silicone paper layer 6, so that the transparent aluminum-plated window of the holographic anti-counterfeiting first film layer 2 and the naked-eye stereoscopic information are positioned and composited together, and the registration deviation between the transparent aluminum-plated window and the naked-eye stereoscopic information is less than 0.5mm. The first digital information of the holographic anti-counterfeiting first film layer 2 and the hidden verification information under the naked-eye stereoscopic second film layer 3 are correlated and verified to avoid misalignment.

[0058] S4. Use a die-cutting machine to perform die-cutting and waste removal to obtain naked-eye 3D holographic anti-counterfeiting labels.

[0059] The naked-eye stereoscopic holographic anti-counterfeiting label products produced in Examples 1-3, after the silicone paper layer 6 is torn off and pasted onto the outer packaging of the product, can be visually observed to have a stereoscopic effect on the naked-eye stereoscopic second film layer 3. The QR code information of the holographic anti-counterfeiting first film layer 2 is visible, but the hidden verification information is not visible before the departure unit is removed.

[0060] Without the aid of any external tools, an observer can visually perceive the image with a depth-of-field stereoscopic effect on the anti-counterfeiting label. The anti-counterfeiting labels obtained in Examples 2 and 3 can be observed with the aid of a flashlight and a 50x magnifying glass, revealing the point light source encryption information and the micro-letters "TB" of the holographic anti-counterfeiting information. By scanning the QR code on the surface of the anti-counterfeiting label with a mobile phone and peeling off the departure unit of the anti-counterfeiting label, the information of the hidden information layer can be verified. Through triple anti-counterfeiting, the occurrence of counterfeit and shoddy products can be effectively prevented, protecting the legitimate rights and interests of consumers.

Claims

1. A naked-eye 3D holographic anti-counterfeiting label, characterized in that: It includes, from top to bottom, a first digital information layer (1), a holographic anti-counterfeiting first film layer (2), a naked-eye three-dimensional second film layer (3), a hidden verification information layer (4), an adhesive layer (5), and a silicone paper layer (6); The holographic anti-counterfeiting first film layer (2) includes a first transparent base layer (201), a holographic anti-counterfeiting layer (202), and a first aluminum-plated layer (203) arranged sequentially from top to bottom, wherein the first aluminum-plated layer (203) has a transparent aluminum window; The naked-eye stereoscopic second film layer (3) includes, from top to bottom, an imaging unit layer (301), a second transparent base layer (302), and a stereoscopic information layer (303); The holographic anti-counterfeiting first film layer (2) and the naked-eye stereoscopic second film layer (3) are positioned and composited by adhesive, and the naked-eye stereoscopic effect of the naked-eye stereoscopic second film layer (3) can be observed through the transparent aluminum window of the holographic anti-counterfeiting first film layer (2); the transparent aluminum window of the holographic anti-counterfeiting first film layer (2) and the imaging unit element of the naked-eye stereoscopic second film layer (3) are positioned and composited, with a registration deviation of less than 0.5mm; the non-transparent aluminum-plated layer of the holographic anti-counterfeiting first film layer (2) covers the non-imaging unit element area and the verification information area of ​​the naked-eye stereoscopic second film layer (3); The naked-eye 3D holographic anti-counterfeiting label includes a verification unit and a departure unit. The verification unit includes a 3D information layer (303), a hidden verification information layer (4), and an adhesive layer (5). The departure unit includes a first digital information layer (1), a holographic anti-counterfeiting first film layer (2), an imaging unit layer (301), and a second transparent base layer (302). The verification unit is adhered to the packaging through the adhesive layer (5), and the departure unit is separated from the verification unit during use. The three-dimensional information layer (303) has the property of being separable from the second transparent base layer (302); The imaging unit layer (301) is composed of micro-refractive units with a diameter of 40-70 micrometers; The second transparent substrate (302) is a PET film or BOPP film with a thickness between 10 and 30 micrometers.

2. The naked-eye stereoscopic holographic anti-counterfeiting label according to claim 1, characterized in that: The holographic anti-counterfeiting layer (202) has microscopic identification holographic anti-counterfeiting information with holographic point light source encryption technology and / or dual-channel technology.

3. The naked-eye stereoscopic holographic anti-counterfeiting label according to claim 1, characterized in that: The first digital information layer (1) and the hidden verification information layer (4) have a one-to-one correspondence.

4. The method for preparing the naked-eye stereoscopic holographic anti-counterfeiting label according to any one of claims 1-3, characterized in that: S1. Prepare the first holographic anti-counterfeiting film layer (2) and the first digital information layer (1); S2, Prepare the naked-eye three-dimensional second membrane layer (3) and the hidden verification information layer (4); S3. Position and composite the holographic anti-counterfeiting first film layer (2), the naked-eye stereoscopic second film layer (3), and the silicone paper layer (6); position and composite the transparent aluminum window of the holographic anti-counterfeiting first film layer (2) and the imaging unit element of the naked-eye stereoscopic second film layer (3), with a registration deviation of less than 0.5mm; the non-transparent aluminum-plated layer of the holographic anti-counterfeiting first film layer (2) covers the non-imaging unit element area and the verification information area of ​​the naked-eye stereoscopic second film layer (3); S4. Die-cut and remove waste to obtain naked-eye 3D holographic anti-counterfeiting labels.

5. The method for preparing the naked-eye stereoscopic holographic anti-counterfeiting label according to claim 4, characterized in that: In step S1, the first transparent base layer (201) is prepared by coating machine, molding machine, aluminum plating machine, aluminum washing machine and printing machine to prepare holographic anti-counterfeiting first film layer (2) and first digital information layer (1); molding machine, aluminum plating machine and aluminum washing machine are used to form holographic anti-counterfeiting layer (202) and first aluminum plating layer (203) with transparent aluminum washing window, and printing machine is used to form first digital information layer (1).

6. The method for preparing the naked-eye stereoscopic holographic anti-counterfeiting label according to claim 4, characterized in that: In step S2, the second transparent base layer (302) is prepared by using a molding machine and a printing machine to prepare the naked-eye stereoscopic second film layer (3) and the hidden verification information layer (4); the molding machine is used to form the imaging unit layer (301) and stereoscopic information layer (303) of the naked-eye stereoscopic second film layer (3), and the printing machine is used to form the hidden verification information layer (4).

7. The method for preparing the naked-eye stereoscopic holographic anti-counterfeiting label according to claim 4, characterized in that: In step S3, pressure-sensitive adhesive coating is applied to the naked-eye stereoscopic second film layer (3) and the hidden verification digital information layer, and the pressure-sensitive adhesive layer is formed after the solvent evaporates.

8. The method for preparing the naked-eye stereoscopic holographic anti-counterfeiting label according to claim 4, characterized in that: In step S1, the first transparent substrate (201) is subjected to corona treatment to achieve a surface tension of 40 dynes or more.

Images