NFC-LED based hidden fluorescent code anti-counterfeiting label and production process thereof

Abstract

The application relates to the technical field of anti-fake labels, in particular to a hidden fluorescent code anti-fake label based on NFC-LED and a production process thereof. The hidden fluorescent code anti-fake label based on NFC-LED comprises a surface layer, an NFC-LED layer and a bottom layer which are sequentially compounded from top to bottom, a glue layer is arranged between the layers, and the whole is attached to a release base paper; custom graphics and variable digital information are printed on the surface of the surface layer; the NFC-LED layer takes transparent PET as a base material, a high-frequency electromagnetic induction coil is processed on the base material, the high-frequency electromagnetic induction coil is respectively bound with an NFC chip and an ultraviolet fluorescent LED chip through a flip chip process, a rectifier and voltage stabilizing module is built in the NFC chip, when an NFC terminal is close, the high-frequency electromagnetic induction coil generates alternating current, the alternating current is rectified and stabilized, and the ultraviolet fluorescent LED chip is driven to light up.

Description

Technical Field

[0001] This invention relates to the field of anti-counterfeiting label technology, specifically to an NFC-LED-based hidden fluorescent code anti-counterfeiting label and its manufacturing process. Background Technology

[0002] Radio Frequency Identification (RFID) is a contactless automatic identification technology that is widely used in industry, commerce, and logistics due to its advantages such as contactless reading, multi-target identification, large storage capacity, and adaptability to harsh working conditions. NFC, a derivative technology of high-frequency RFID, leverages the widespread use of smartphones and is often combined with ultraviolet fluorescent LEDs, using electromagnetic induction to activate the light. Traditional fluorescent code anti-counterfeiting labels use fluorescent ink to print hidden codes that are invisible under normal conditions but appear after being activated by ultraviolet light; they are often paired with QR codes for product anti-counterfeiting and information retrieval.

[0003] Currently, mainstream fluorescent code anti-counterfeiting self-adhesive labels on the market have obvious technical defects: First, the anti-counterfeiting capabilities are weak and the anti-counterfeiting mechanisms are simple, mostly using a combination of QR codes and static fluorescent codes. Counterfeiters can copy QR codes and fluorescent codes in batches, making the counterfeiting threshold and cost low, thus failing to achieve effective anti-counterfeiting. Secondly, the verification process is inconvenient. Reading the hidden fluorescent code requires an external ultraviolet fluorescent lamp. Ordinary consumers do not carry special tools with them and cannot verify authenticity anytime and anywhere, resulting in a poor user experience and reducing the credibility of the product anti-counterfeiting system.

[0004] In addition, existing anti-counterfeiting labels generally do not achieve deep binding of chip data, fluorescent codes, and visual text, making it difficult to support traceability management throughout the entire product lifecycle. Summary of the Invention

[0005] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a hidden fluorescent code anti-counterfeiting label based on NFC-LED and its production process. This invention can autonomously activate the fluorescent code using a mobile phone's NFC module, achieving verification without special tools; it constructs a multi-layered anti-counterfeiting system through unique binding of multiple sets of data, significantly increasing the difficulty of counterfeiting; simultaneously, it enables traceability throughout the entire process of product production, warehousing, logistics, and marketing, and features a stable production process, high processing precision, and controllable production costs.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An NFC-LED-based hidden fluorescent code anti-counterfeiting label includes a top layer, an NFC-LED layer, and a bottom layer, which are laminated from top to bottom. An adhesive layer is provided between each layer, and the whole is adhered to a release liner. The surface layer is printed with customized graphics and variable digital information; The NFC-LED layer uses transparent PET as a substrate, on which a high-frequency electromagnetic induction coil is processed. The high-frequency electromagnetic induction coil is bonded to the NFC chip and the ultraviolet fluorescent LED chip respectively through a flip-chip process. The NFC chip has a built-in rectification and voltage regulation module. When the NFC terminal is close, the high-frequency electromagnetic induction coil generates an alternating current, which is rectified and regulated to drive the ultraviolet fluorescent LED chip to light up. The bottom layer is a transparent PET substrate. A UV transparent release layer is provided on one side of the substrate. Hidden fluorescent codes and variable QR codes and variable graphics corresponding to the hidden fluorescent codes are printed on the front and back of the substrate using a mirror printing process. The NFC chip stores a unique UID code, and the NFC chip stores data, a variable QR code, a hidden fluorescent code, variable images and text, and the UID code to achieve a five-code correspondence.

[0007] The resonant frequency f of the high-frequency electromagnetic induction coil satisfies the formula: f= ; Where L is the inductance of the electromagnetic induction coil, and C is the total capacitance of the circuit; The NFC chip has a preset input capacitance of 23.5pF, an inductance value L controlled between 1-3μH, and a capacitance value C controlled between 25-100pF.

[0008] The surface layer is plain laser-etched PET; The release liner is glassine release liner with a basis weight of 60g.

[0009] The bottom UV transparent release liner is made of silicone-modified acrylate and is treated with a UV curing process. After the label is peeled off, the UV transparent release layer leaves the variable QR code and variable graphics on the bottom side of the product surface.

[0010] A production process for a hidden fluorescent code anti-counterfeiting label based on NFC-LED, applicable to the anti-counterfeiting label described above, includes the following steps: S1. Preparation of NFC-LED dual-chip high-frequency inlay: A high-frequency electromagnetic induction coil is processed on a transparent PET substrate of the NFC-LED layer, and the NFC chip and the ultraviolet fluorescent LED chip are bonded together using a flip-chip process to make an NFC-LED semi-finished product. S2, Isolation Layer Coating: A UV transparent release coating is applied to one side of the underlying PET substrate and cured to form an isolation layer; S3. Data Association Grouping: Generate one-to-one corresponding NFC data, variable QR code data, hidden fluorescent code data, and variable graphic data groups through the system platform, and establish the association between transition QR codes and variable digital codes; S4. Front and back mirror printing: Take the bottom PET substrate with the prepared isolation layer, and use a digital printing equipment to complete the printing of the hidden fluorescent code data, page number mark and positioning cursor pattern on the non-isolation layer side of the bottom PET substrate using mirror printing technology. During the second printing, using the page number mark and positioning cursor as the registration reference, the variable QR code data and variable graphic data are printed on the side of the bottom substrate with the isolation layer using mirror printing technology, so as to achieve accurate registration printing of variable data on both sides of the same substrate. S5. Surface printing: Custom graphics and variable digital images are printed on the surface using flexographic, offset, or digital printing methods. S6. Multi-layer composite die-cutting: Using the positioning cursor and tracking black mark as the registration reference, the top layer, NFC-LED layer and bottom layer are precisely composited, and then the release paper is attached. The finished label is obtained by die-cutting. S7. Data Initialization: Collect the tag transition QR code, write the corresponding bound data into the NFC chip, and simultaneously extract the NFC chip, variable QR code, hidden fluorescent code, variable image and text, and UID code to fill in the complete data group corresponding to each other, and import it into the system platform.

[0011] In step S1, the flip-chip process uses fast-curing conductive adhesive, with a spray amount of 0.015μL±5%, a hot-pressing temperature of 120-150℃, a hot-pressing pressure of 2.0MPa, and a curing time of 3s; the ultraviolet fluorescent LED chip emits light at a wavelength of 365nm.

[0012] In step S2, a 500-mesh anilox roller is used to apply the coating at a speed of 50 meters per minute. After coating, the isolation layer is prepared by UV curing.

[0013] In step S4, after printing, solvent adhesive is applied to the variable graphic side, with an amount of 16g ​​± 1g and a coating speed of 45-60 meters / minute. The printing is then dried in two stages with hot air: the first stage drying temperature is 70-80℃ and the second stage drying temperature is 110-120℃.

[0014] In step S6, the composite pressure of the multi-layer material is controlled at 2MPa. After the composite is completed, the material is die-cut and waste is removed according to the tracking and positioning black mark to obtain a roll label with uniform jump distance.

[0015] In step S7, after initialization, the five sets of data—NFC chip data, UID code, hidden fluorescent code, variable QR code, and variable graphic text—are uniquely bound and synchronized to the system platform for anti-counterfeiting verification and end-to-end traceability.

[0016] The beneficial effects achieved by this invention are: 1. This invention offers convenient verification: No additional ultraviolet fluorescent lamp is required. The NFC function of a regular smartphone can activate the ultraviolet LED to quickly display the hidden fluorescent code. Consumers can complete anti-counterfeiting verification anytime and anywhere, greatly improving the user experience. 2. The present invention has a high level of anti-counterfeiting: it achieves unique binding of multiple sets of data such as NFC unique UID code, hidden fluorescent code, variable QR code, and variable graphic text, and provides dual protection through multi-layer physical structure and multiple data associations, making it extremely difficult to counterfeit and preventing mass counterfeiting. 3. The present invention has strong anti-tampering capabilities: a transparent isolation layer is set at the bottom, and after the label is peeled off, the variable graphics and variable QR code remain on the surface of the product, which can complete the secondary graphic comparison and prevent the label from being transferred and reused; 4. The present invention has comprehensive traceability capabilities: the NFC chip stores information about the entire product chain, and scanning or recognizing NFC can retrieve traceability data such as production, quality inspection, logistics, and sales, ensuring consumers' right to know; 5. The invention has good production adaptability: the whole process is mature and stable, the precision of multi-layer lamination, printing and binding processes is controllable, the raw materials are readily available, the cost is controllable after large-scale production, and it is suitable for labeling various commodities. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the anti-counterfeiting label of the present invention; Figure 2 This is a schematic diagram of the NFC-LED layer structure of the present invention; Figure 3 This is a schematic diagram of the information retention structure after the label of this invention is peeled off; Figure 4 This is a schematic diagram illustrating the logical relationship between multiple sets of data in this invention; Figure 5 This is a schematic diagram of the front and back mirror printing structure of the underlying substrate of the present invention; Figure 6 This is a schematic diagram of the multilayer substrate alignment composite die-cutting structure of the present invention; Figure 7 This is a schematic diagram illustrating the NFC information initialization process of the transition QR code in this invention.

[0018] In the diagram: 1. Top layer; 2. NFC-LED layer; 21. Ultraviolet fluorescent LED chip; 22. NFC chip; 23. High-frequency electromagnetic induction coil; 3. Bottom layer; 4. Isolation layer; 5. Release paper. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example: like Figure 1 , Figure 2 , Figure 3 As shown, a hidden fluorescent code anti-counterfeiting label based on NFC-LED includes a top layer 1, an NFC-LED layer 2, and a bottom layer 3, which are laminated from top to bottom. An adhesive layer is provided between each layer, and the whole is adhered to the release paper 5. The surface of the surface layer 1 is printed with customized graphics and variable digital information; The NFC-LED layer 2 uses 30μm transparent PET as a substrate, on which a high-frequency electromagnetic induction coil 23 is processed. The high-frequency electromagnetic induction coil 23 is bonded to the NFC chip 22 and the ultraviolet fluorescent LED chip 21 respectively through a flip-chip process. The center frequency of the electromagnetic induction coil after bonding is controlled at 13.56MHz±1MHz, which is suitable for high-frequency readers or mobile phone NFC modules to efficiently identify and light up the LED. The NFC chip 22 has a built-in rectification and voltage regulation module. When the NFC terminal is close, the high-frequency electromagnetic induction coil 23 generates an alternating current, which is rectified and regulated to drive the ultraviolet fluorescent LED chip 21 to light up. The bottom layer 3 is a 30μm transparent PET substrate. A UV transparent release layer 4 is provided on one side of the substrate. Hidden fluorescent codes and variable QR codes and variable graphics corresponding to the hidden fluorescent codes are printed on the front and back of the substrate using a mirror printing process. The NFC chip 22 stores a unique UID code, and the NFC chip 22 stores data, a variable QR code, a hidden fluorescent code, variable images and text, and a UID code to achieve a five-code correspondence.

[0021] The resonant frequency f of the high-frequency electromagnetic induction coil 23 satisfies the formula: f= ; Where L is the inductance of the electromagnetic induction coil, and C is the total capacitance of the circuit; The NFC chip 22 has a preset input capacitance of 23.5pF, an inductance value L controlled between 1-3μH, and a capacitance value C controlled between 25-100pF.

[0022] The surface layer 1 is a 15μm plain laser-etched PET; The release paper 5 is glassine release paper 5 with a basis weight of 60g.

[0023] The UV transparent release liner 4 of the bottom layer 3 is made of silicone-modified acrylate and is treated with a UV curing process. After the label is peeled off, the UV transparent release layer 4 leaves the variable QR code and variable graphics on one side of the bottom layer 3 on the surface of the product.

[0024] like Figures 1-7 As shown, the production process of the NFC-LED-based hidden fluorescent code anti-counterfeiting label includes the following: (1) Fabrication of NFC-LED dual-chip high-frequency inlay: NFC-LED high-frequency inlay binding: Based on a center frequency of 13.56MHz, according to f= The resonant frequency is calculated so that the resonant inductance L and capacitance C of the high-frequency electromagnetic induction coil 23 are matched with the capacitance of the NFC chip 22; the capacitance of the NFC chip 22 is 23.5pF, the inductance L is controlled between 1-3μH, and the capacitance C is controlled between 25-100pF.

[0025] The aluminum etching process requires an aluminum washing precision of ≤0.05mm for the diameter and spacing of the electromagnetic induction coils. The wire diameter is typically set at 0.25mm-0.5mm, and the spacing at 0.2mm-0.4mm. According to... The antenna turns calculation specifies the antenna turns N within the antenna size Davg range. Taking a high-frequency electromagnetic induction coil 23 with a design size of 45×45mm as an example, a square antenna with a line width of 0.3mm, a line spacing of 0.25mm, and 6-8 turns can be designed by calculating the determined inductance value L, antenna line spacing S, line diameter W, and antenna size Davg.

[0026] The LED chip uses a 365nm long-wave ultraviolet fluorescent chip. After receiving electromagnetic signals, the electromagnetic induction coil generates an alternating current of 1μA, which is converted into DC by the built-in rectification and voltage regulation module of the NFC chip 22. The DC current excites the ultraviolet fluorescent lamp to flash. A high-frequency electromagnetic induction coil 23 with two chip bonding points is designed. The NFC chip 22 and the LED chip are bonded to the antenna coil through the Flip chip bonding process. During bonding, the amount of conductive adhesive sprayed is controlled at 0.015μL±5%, and the adhesive surface completely covers the chip pins. Fast-curing conductive adhesive is used, the temperature of the hot press head is controlled at 120-150℃, the hot pressure is 2.0MPa, and the curing time is 3s.

[0027] Wet inlay production of NFC-LED layer 2: The high-frequency electromagnetic induction coil 23 of the NFC-LED layer 2 is fabricated on a 38μm thick PET substrate. A 16μm thick adhesive layer is laminated on one side of the PET composite chip to create a single-sided wet inlay with adhesive. A solvent-based adhesive film is laminated between the NFC chip 22 and the LED chip, with the adhesive amount controlled at 16g / m². 2 ±1g / m 2The composite pressure is controlled at 2MPa to avoid excessive pressure damaging the chip by the composite roller. The chip is then die-cut into wet inlays with equal pitch by the die-cutting unit, thus completing the NFC-LED layer 2.

[0028] (2) Coating of isolation layer 4: Take a 30μm transparent PET substrate, use a 500-mesh anilox roller and a speed of 50 meters / minute to coat one side of the substrate with an organosilicon-modified acrylic UV transparent release coating, and cure it with UV to form an isolation layer 4. Take anti-reverse adhesion measures during the winding process.

[0029] (3) System data grouping: Data groups are generated in batches through the backend system platform to achieve one-to-one mapping and logical binding of NFC data, variable QR code data, hidden fluorescent code data, and variable graphic data, and to establish the association between transition QR codes and variable digital codes, and export complete data files.

[0030] (4) Mirror-image printing of the bottom 3 substrates: Take the bottom layer 3 of the prepared isolation layer 4, and use a digital printing device to perform a mirror printing process on the non-isolation layer side of the bottom layer 3 to complete the printing of the hidden code data, page number identification, and positioning cursor pattern information layer; during the second printing, using the page number identification and positioning cursor as the registration reference, simultaneously use a mirror printing process on the side of the bottom layer 3 with the isolation layer 4 to complete the printing of the variable QR code data and variable graphic data information layer, so as to achieve accurate registration printing of variable data on both sides of the same substrate.

[0031] After printing, apply 16g±1g solvent adhesive to one side of the residual information layer, dry with hot air in two stages at a speed of 45-60 meters / minute, the first stage at 70-80℃ and the second stage at 110-120℃, and finally attach 60g glassine release paper for later use.

[0032] (5) Surface layer 1 printing: 15μm plain laser PET is selected as the surface layer 1. Customized patterns and variable digital codes are printed by customers through flexographic printing, offset printing or digital printing. Each label is assigned a unique character code through digital printing equipment, which is used as a surface identification and data association index. Personalized anti-counterfeiting elements such as holography, hot stamping and digital enhancement can be superimposed.

[0033] (6) Multi-layer positioning composite and die-cutting: Using a laminating device, the top layer 1, NFC-LED layer 2, and bottom layer 3 substrates are loaded separately. The three layers are precisely aligned with the printing positioning cursor and the tracking black mark as a reference. They are then bonded together with adhesive. Double-sided tape and 60g glassine release paper are then laminated. After the lamination process is completed, the black mark is tracked and positioned. The laminated material is then die-cut at the die-cutting station to obtain the final label.

[0034] (7) NFC data initialization: In the front and back digital printing process of the bottom layer 3, when the digital printing equipment prints variable digital codes and page numbers, it generates a transitional QR code for the page number, establishes an association between the transitional QR code and the variable digital code, and exports the associated data file. The finished label uses an NFC initialization device to collect the transitional QR code of the bottom layer 3, finds the NFC data corresponding to the transitional QR code, and writes it into the NFC chip 22; at the same time, it extracts the NFC, the bottom layer 3 QR code, the variable hidden code, the variable graphic text, and the UID unique code to fill in a complete data group that corresponds one-to-one. This data is then imported into the system platform to meet the needs of multiple application scenarios for products, including production, logistics, marketing, and anti-counterfeiting traceability.

[0035] (8) Actual inspection and usage process: Consumers use their mobile phones' NFC function to bring them close to the tag. The phone reads the data from the NFC chip 22 and redirects to an anti-counterfeiting query page. At the same time, the NFC-LED layer 2 senses and generates current, illuminating the ultraviolet LED and exciting the hidden fluorescent code to make it visible. Consumers enter the fluorescent code into the query page and compare the image and text on the page with the variable image and text left on the product surface after the tag is peeled off. If the two match, the product is determined to be genuine; otherwise, it is a counterfeit product. At the same time, the entire process traceability information of the product can be retrieved through NFC.

Claims

1. A hidden fluorescent code anti-counterfeiting label based on NFC-LED, characterized in that, It includes a top layer (1), an NFC-LED layer (2), and a bottom layer (3) that are sequentially laminated from top to bottom. Each layer is separated by an adhesive layer and is bonded to a release liner (5). The surface of the surface layer (1) is printed with customized graphics and variable digital information; The NFC-LED layer (2) uses transparent PET as a substrate, and a high-frequency electromagnetic induction coil (23) is processed on the substrate. The high-frequency electromagnetic induction coil (23) is bonded to the NFC chip (22) and the ultraviolet fluorescent LED chip (21) respectively through flip chip process. The NFC chip (22) has a built-in rectification and voltage regulation module. When the NFC terminal is close, the high-frequency electromagnetic induction coil (23) generates an alternating current, which drives the ultraviolet fluorescent LED chip (21) to light up after rectification and voltage regulation. The bottom layer (3) is a transparent PET substrate. A UV transparent release isolation layer (4) is provided on one side of the substrate. The front and back sides of the substrate are printed with hidden fluorescent codes and variable QR codes and variable graphics that are logically corresponding to the hidden fluorescent codes, respectively, using mirror printing process. The NFC chip (22) stores a unique UID code. The NFC chip (22) stores data, a variable QR code, a hidden fluorescent code, variable graphics and text, and a UID code to achieve a five-code correspondence.

2. The NFC-LED-based hidden fluorescent code anti-counterfeiting label according to claim 1, characterized in that, The resonant frequency f of the high-frequency electromagnetic induction coil (23) satisfies the following formula: f= ； Where L is the inductance of the electromagnetic induction coil, and C is the total capacitance of the circuit; The inductance value L is controlled between 1-3μH, and the capacitance value C is controlled between 25-100pF.

3. The hidden fluorescent code anti-counterfeiting label based on NFC-LED according to claim 1, characterized in that, The surface layer (1) is plain laser-etched PET; The release liner (5) is glassine release liner.

4. The NFC-LED-based hidden fluorescent code anti-counterfeiting label according to claim 1, characterized in that, The UV transparent release liner (4) of the bottom layer (3) is made of silicone-modified acrylate and is treated with UV curing process. After the label is peeled off, the UV transparent release layer (4) leaves the variable QR code and variable graphics on one side of the bottom layer (3) on the surface of the product.

5. A production process for a hidden fluorescent code anti-counterfeiting label based on NFC-LED, applicable to the anti-counterfeiting label according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Preparation of NFC-LED dual-chip high-frequency inlay: A high-frequency electromagnetic induction coil (23) is processed on a transparent PET substrate, and an NFC chip (22) and an ultraviolet fluorescent LED chip (21) are bonded together using a flip-chip process to make an NFC-LED semi-finished product; S2, Isolation layer (4) coating: UV transparent release coating is applied to one side of the bottom (3) PET substrate and cured to form isolation layer (4); S3. Data Association Grouping: Generate one-to-one corresponding NFC data, variable QR code data, hidden fluorescent code data, and variable graphic data groups through the system platform, and establish the association between transition QR codes and variable digital codes; S4. Front and back mirror printing: Take the bottom (3) PET substrate with the prepared isolation layer (4), and use a digital printing equipment to complete the printing of hidden fluorescent code data, page number mark and positioning cursor pattern on the non-isolation layer side of the bottom (3) PET substrate using mirror printing technology. When printing the second time, use the page number mark and positioning cursor as the registration reference, and simultaneously use mirror printing technology on the side of the bottom (3) substrate with isolation layer (4) to complete the printing of variable QR code data and variable graphic data to achieve accurate registration printing of variable data on both sides of the same substrate. S5, Surface (1) Printing: Print custom graphics and variable digital images on the surface (1) using flexographic printing, offset printing or digital printing methods; S6. Multi-layer composite die-cutting: Using the positioning cursor and tracking black mark as the registration reference, the surface layer (1), NFC-LED layer (2), and bottom layer (3) are precisely composited, and then the release paper (5) is attached. The finished label is obtained by die-cutting. S7. Data initialization: Collect the tag transition QR code, write the corresponding bound data into the NFC chip (22), and at the same time extract the NFC chip (22), variable QR code, hidden fluorescent code, variable graphic and text, and UID code to fill the complete data group corresponding to each other, and import it into the system platform.

6. The production process of the NFC-LED-based hidden fluorescent code anti-counterfeiting label according to claim 5, characterized in that, In step S1, the flip chip process uses fast-curing conductive adhesive, with a conductive adhesive spraying amount of 0.015μL±5%, a hot pressing temperature of 120-150℃, a hot pressure of 2.0MPa, and a curing time of 3s; the ultraviolet fluorescent LED chip (21) emits wavelength of 365nm.

7. The production process of the NFC-LED-based hidden fluorescent code anti-counterfeiting label according to claim 5, characterized in that, In step S2, a 500-mesh anilox roller is used to apply the coating at a speed of 50 meters per minute. After coating, the isolation layer (4) is prepared by UV curing.

8. The production process of the NFC-LED-based hidden fluorescent code anti-counterfeiting label according to claim 5, characterized in that, In step S4, after printing, solvent adhesive is applied to the variable graphic side, with an amount of 16g ​​± 1g and a coating speed of 45-60 meters / minute. The printing is then dried in two stages with hot air: the first stage drying temperature is 70-80℃ and the second stage drying temperature is 110-120℃.

9. The production process of the NFC-LED-based hidden fluorescent code anti-counterfeiting label according to claim 5, characterized in that, In step S6, the composite pressure of the multi-layer material is controlled at 2MPa. After the composite is completed, the material is die-cut and waste is removed according to the tracking and positioning black mark to obtain a roll label with uniform jump distance.

10. The production process of the NFC-LED-based hidden fluorescent code anti-counterfeiting label according to claim 5, characterized in that, In step S7, after initialization, the five sets of data (22) of the NFC chip, UID code, hidden fluorescent code, variable QR code and variable graphic are uniquely bound and synchronized to the system platform for anti-counterfeiting verification and full-chain traceability.

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