WO2016177301A1 - 微纹防伪方法 - Google Patents

微纹防伪方法 Download PDF

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Publication number
WO2016177301A1
WO2016177301A1 PCT/CN2016/080763 CN2016080763W WO2016177301A1 WO 2016177301 A1 WO2016177301 A1 WO 2016177301A1 CN 2016080763 W CN2016080763 W CN 2016080763W WO 2016177301 A1 WO2016177301 A1 WO 2016177301A1
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Prior art keywords
identifier
graphic
logo
coded
micro
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PCT/CN2016/080763
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English (en)
French (fr)
Inventor
钟林娟
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励元科技(上海)有限公司
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Priority claimed from CN201610218598.0A external-priority patent/CN106067277B/zh
Application filed by 励元科技(上海)有限公司 filed Critical 励元科技(上海)有限公司
Publication of WO2016177301A1 publication Critical patent/WO2016177301A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q30/00—Commerce
    • G06Q30/018—Certifying business or products
    • G06Q30/0185—Product, service or business identity fraud
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q30/00—Commerce
    • 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

Definitions

  • the invention relates to an anti-counterfeiting method, in particular to a micro-pattern anti-counterfeiting method.
  • An identification code is a code that uniquely identifies an entity in a type of data. It facilitates storage by entity or query and retrieval of entities one by one. With the development and application of computer and information technology, bar code labels integrating coding, printing, identification, data acquisition and processing have emerged.
  • Barcodes are a number of black bars and spaces of varying widths arranged according to certain encoding rules to express a set of graphical identifiers. Each product has a unique traceability. Barcode.
  • a common bar code is a parallel line pattern in which black bars (abbreviated as bars) and white bars (abbreviated as empty) having a large difference in reflectance are arranged.
  • the barcode can indicate the country of manufacture, the manufacturer, the name of the item, the date of manufacture, the classification number of the book, the start and end of the mail, the category, the date, and the like.
  • bar codes there are various classifications of bar codes, such as commercial general bar codes and industrial general bar codes, which are generally classified into one-dimensional codes and two-dimensional codes. At present, the number of bar code scans required to be used every day has exceeded 100 million times.
  • the scope of application covers various fields and industries, including logistics, warehousing, libraries, banks, pos cash register systems, medical and health, retail. Goods, clothing, food services, high-tech electronics, and more.
  • the technical problem to be solved by the present invention is to provide a micro-pattern anti-counterfeiting method, which can effectively prevent theft-proof anti-counterfeiting data from being used for fraud, hardly increase the production printing cost, and has a simple process and is easy to implement and popularize.
  • the technical solution adopted by the present invention to solve the above technical problem is to provide a micro-pattern anti-counterfeiting method comprising the steps of: a) printing to form a coded logo or a graphic logo having a random sawtooth edge; b) marking the printed code or The graphic identifier is enlarged to take a photo, and the zigzag feature photo of the coded logo or the graphic identifier is obtained; c) the sawtooth feature photo of the encoded identifier or the graphic identifier is stored as the anti-counterfeiting feature filing information.
  • the above-mentioned micro-pattern anti-counterfeiting method wherein the printing process of the coded mark or the graphic mark having the random sawtooth edge in the step a) is as follows: a1) pre-printing and spreading in the printing area where the mark or graphic mark is printed on the substrate. Coating; a2) continuing to print the ink layer constituting the coded mark or graphic mark on the diffusing agent coating; a3) controlling the coded mark or the graphic mark to have a sawtooth height of 0.01 mm to 0.03 mm.
  • micro-pattern anti-counterfeiting method wherein the step a1) first erasing the surface of the printing region with ethanol or acetone before printing the diffusing agent coating, the step a2) adding a diluent and a film to the ink layer And controlling the viscosity of the ink layer to be 5 to 10 mPa ⁇ s.
  • the above-mentioned micro-pattern anti-counterfeiting method wherein the printing process of the coded mark or the graphic mark having the jagged edge in the step a) is as follows: a paper having a smoothness of 100 to 150 s is selected as a substrate; and a coding code is printed on the substrate.
  • the ink layer of the logo or graphic logo; a vinyl acetate-ethylene copolymer emulsion having a mass percentage of 0.35 to 5.85% is added to the ink layer; and the sawtooth height of the control code mark or graphic logo is 0.01 mm to 0.03 mm.
  • step b) adopts a macro-enlarged shooting mode in which the object distance is less than 390 mm for the printed code mark or the graphic mark.
  • the magnification taking ratio in the step b) is 8 to 80 times.
  • step c) first compares the coded identifier or the graphic identifier, and if the inconsistency directly feedbacks the identification conclusion as a counterfeit product; if the encoded identifier or the graphic identifier is consistent, the ratio continues A sawtooth feature photo corresponding to the code or graphic identifier.
  • step c) uses a mobile phone to capture a coded logo or a graphic logo on a substrate to obtain a physical scene photograph with a personalized zigzag edge, and then upload the physical scene photo to the computer for security.
  • the network query system performs authentication; if the code matches, the initial authentication conclusion is true, and the link of the final identification conclusion is returned to the user's mobile phone; the computer anti-counterfeiting network is in a period of time before the link of the final identification conclusion is opened by the user.
  • the inquiry system compares the physical scene photos with the pre-recorded stored sawtooth feature photos, makes the final identification conclusion, and waits for the user to open the link and obtain the final conclusion.
  • step c) uses the coding identifier or the graphic identifier to perform the first anti-counterfeiting query comparison; if the same coding identifier or the graphic identifier is used for two or more anti-counterfeiting queries, The zigzag feature photos of the coded logo or the graphic identifier are collected for comparison verification.
  • the coded identifier is a serial number, a one-dimensional barcode, a two-dimensional code, a production date, a product batch number, an anti-counterfeit digital, a promotional integral code, a redemption code, an anti-counterfeiting code, or a product trace source.
  • the present invention has the following beneficial effects: the micro-pattern anti-counterfeiting method provided by the invention forms a coded mark or a graphic mark with a sawtooth edge by printing, and stores a coded mark or a graphic mark and a corresponding saw.
  • the tooth feature photo is used as the anti-counterfeiting feature filing information, so that the anti-counterfeit data after the theft can be effectively prevented from being used for fraud, the production printing cost is hardly increased, and the process is simple and easy to implement and popularize.
  • FIG. 1 is a schematic view of a micro-pattern anti-counterfeiting process of the present invention
  • FIG. 2 is a partially enlarged schematic view showing a pharmaceutical electronic supervision code using the present invention
  • FIG. 3 is a schematic cross-sectional view of a bar code having a sawtooth edge according to the present invention.
  • FIG. 4 is a schematic view showing the structure of a two-dimensional code having a sawtooth edge according to the present invention.
  • Figure 5 is a schematic view showing the date of production of dot matrix printing on a package using the present invention.
  • Figure 6 is an enlarged schematic view of a single ink dot in Figure 5 (production date).
  • FIG. 1 is a schematic view of a micro-pattern anti-counterfeiting process of the present invention.
  • a micro-pattern anti-counterfeiting method includes the following steps:
  • Step S1 printing forms a coded logo or a graphic identifier having a random sawtooth edge, and controls the coded logo or the graphic identifier to have a sawtooth height of 0.01 mm to 0.03 mm;
  • Step S2 performing a magnified photographing on the printed coded logo or the graphic identifier, and acquiring a sawtooth feature photograph of the encoded identifier or the graphic identifier;
  • Step S3 storing the sawtooth feature photo of the coded identifier or the graphic identifier as the anti-counterfeiting feature filing information.
  • the micro-pattern anti-counterfeiting method provided by the present invention focuses on "how to prevent theft-proof anti-counterfeiting data from being used for fraud", instead of focusing on "how to prevent theft of anti-counterfeit data” as most of the peers do.
  • the present invention found through experiments that a set of codes was printed 1000 times on an invoice paper using an inkjet printer. Taking a macro shot with a camera phone, and then magnifying the photo, the result shows that the 1000 encoded ink edges randomly generate some tiny sawtooth. Further observations revealed that there were no two codes that were identical to the tiny sawtooth.
  • the present invention deliberately prints a coded logo or a graphic logo having a jagged edge, and utilizes the sawtooth of the ink edge to have the property of being unforgeable and easy to recognize by the mobile phone, and is used as an anti-counterfeit identification feature.
  • the definitions of the main terms involved in the present invention are as follows:
  • Sawtooth refers to the sawtooth (commonly known as burr) or the concave sawtooth (commonly known as the nick) on the edge of the ink such as the code/text, and also includes the sawtooth of the laser die-cut edge, laser coding (character or line edge). Sawtooth.
  • Encoding A number used to uniquely identify a product, specifically one or more of the following various codes, such as serial number, one-dimensional bar code, two-dimensional code, production date, product batch number, anti-counterfeiting digital, promotional integral code, redemption Code, anti-smuggling code, product source code and so on.
  • Graphic Refers to a variety of graphics, text, punctuation, strokes, points, lines and so on.
  • Jagged edge refers to the intersection of sawtooth and paper on the edge of the ink such as code/text.
  • the jagged edge is a randomly curved micro-curve with randomness, uniqueness, and non-reproducibility.
  • A1 pre-printing a diffusing agent coating in a printing zone that encodes a logo or graphic logo on the substrate;
  • the sawtooth height of the control code mark or the graphic mark is 0.01 mm to 0.03 mm, preferably 0.029 mm.
  • the control sawtooth height is 0.01mm ⁇ 0.03mm, which will not affect the printing quality, that is, it will not be mistaken for printing defective products. . As shown in Fig.
  • a certain ink substrate 2 is transported by a UV printer.
  • Spraying the code the printed electronic ink 3 acts as a cold-hot glue, and the silver laser cold-melting film is pasted, and then pressed by a pressure roller and then peeled off, thereby transferring the silver transfer layer 7 to the electronic ink 3 to produce a contour.
  • Clear (no gradient) random sawtooth edge 6 drug electronic supervision code The electronic supervision code of the drug thus produced has a clear outline of the serrated edge 6 and no gradient color, and is easy to be automatically recognized by the anti-counterfeiting query APP, and the code 4 has a metallic jagged random jagged edge close-up photo.
  • the personalized jagged edge close-up photo is randomly taken from the cold foil film, so it is extremely difficult to double (intercept) the registration, and it is extremely difficult to manufacture the fake.
  • Paper smoothness is a technical indicator for evaluating the degree of unevenness on the surface of paper.
  • the Buick airflow smoothness tester is generally used to measure the paper as the paper smoothness data under a vacuum condition, when a certain volume of air flows between a paper sample and a smooth glass under a certain pressure (usually 100 kPa). The longer the time, the smaller the gap between the paper and the glass surface, and the smoother the surface of the paper. However, the smoother the surface of the paper, the worse the diffusion effect.
  • the invention preferably adopts a substrate which is easy to cause diffusion, and the printing process is as follows: paper having a smoothness of 100 to 150 s is selected as a substrate; an ink layer constituting a coded logo or graphic logo is printed on the substrate; and the ink layer is added A vinyl acetate-ethylene copolymer emulsion having a mass percentage of 0.35 to 5.85%.
  • the Videojet1610DH dye ink small character inkjet printer is used to print seven dot characters on the bottle filling, on the cans, on the Tetra Pak, and on the plastic parts. Class production date, etc. code 4.
  • the ink layer is used, and it is not necessary to add a high-pressure air spray gun to the filling line to blow the code of the date of manufacture, etc.
  • the ink can be quickly diffused to print the code 4, and the sawtooth height of the code 4 or the graphic 5 can be conveniently controlled to be 0.01 mm to 0.03 mm.
  • a surface of the substrate has a layer of oily ester floating on the surface layer, and the step a1) may first use ethanol or before printing the diffusion agent coating.
  • the surface of the printing zone is erased by acetone so that the subsequent ink layer can be diffused to form a random sawtooth edge; the step a2) adding a diluent and a film forming agent to the ink layer, and controlling the viscosity of the ink layer to be 5 to 10 mPa
  • the film forming agent is at least one of a cellulose type, a ketone type resin, and an acetal, thereby achieving coating of the ink and ensuring that the sawtooth characteristics after molding are not deformed.
  • the step S2 adopts a macro-enlarged shooting mode with an object distance of less than 390 mm for the printed code mark or graphic mark; preferably, the enlargement shooting multiple is 8 to 12 times, so as to be able to On the photographed photos, you can see the shooting of tiny serrations with a size of 0.01 to 0.03.
  • Each 50k-100k photo can clearly record the sawtooth from 0.01mm to 0.3mm on the coding edge.
  • the photographing task can be completed by the current inspection machine, and the photographing speed can be the same as that of the inspection machine, which can reach 0-150 m/min.
  • the inspection machine is the standard of the printing enterprise.
  • the step S3 may first compare the coded identifier or the graphic identifier, and if the inconsistency directly feedbacks the identification conclusion as a counterfeit product; if the encoded identifier or the graphic identifier is consistent, the ratio continues The jagged feature photo corresponding to the code or graphic identifier is used to meet the query requirement of the user faster and better.
  • the step S3 uses a mobile phone to capture a coded logo or a graphic logo on the substrate to obtain a physical scene photograph with a random sawtooth edge, and then upload the physical scene photo to the computer security network for enquiry.
  • the system performs identification; if the coding is consistent, the initial evaluation conclusion is true, and the link of the final identification conclusion is returned to the user's mobile phone; the computer anti-counterfeiting network inquiry system is in the period before the link of the final identification conclusion is opened by the user.
  • the physical scene photos are compared with the pre-recorded stored sawtooth feature photos, and the final identification conclusion is made, and the user is awaited to open the link and obtain the final conclusion.
  • the public can also use the mobile phone to retrieve the pre-recorded stored zigzag feature photos, and self-observe whether the coding sawtooth matches, thus distinguishing the authenticity.
  • the step S3 uses the coded identifier or the graphic identifier to perform the first anti-counterfeiting query comparison; if the same coded identifier or the graphic identifier is used for two or more anti-counterfeiting queries, the encoding is simultaneously acquired.
  • the zigzag feature photos of the logo or graphic logo are compared for verification.

Abstract

一种微纹防伪方法，包括如下步骤：a)印刷形成具有随机锯齿边（6）的编码（4）标识或图文（5）标识；b)对所印刷的编码（4）标识或图文（5）标识进行放大拍照，获取该编码（4）标识或图文（5）标识的锯齿特征照片；c)存储编码（4）标识或图文（5）标识的锯齿特征照片作为防伪特征备案信息；首先对编码（4）标识或图文（5）标识进行比对，如果不一致直接反馈鉴定结论为假冒产品；如果编码（4）标识或图文（5）标识比对一致，则继续比对该编码（4）或图文（5）标识对应的锯齿特征照片。微纹防伪方法通过印刷形成具有锯齿边（6）的编码（4）标识或图文（5）标识，存储编码（4）标识或图文（5）标识的锯齿特征照片作为防伪特征备案信息，能够有效防止被盗后的防伪数据用于造假，几乎不增加生产印刷成本，工艺简单，易于实施。

Description

微纹防伪方法 技术领域
本发明涉及一种防伪方法，尤其涉及一种微纹防伪方法。
背景技术
标识码用以对某一类数据中某个实体进行唯一标识的代码，它便于按实体进行存贮或对实体进行逐个查询和检索。随着计算机与信息技术的发展和应用，集编码、印刷、识别、数据采集和处理于一身的条形码标签应运而生。
条形码(barcode)统称为条码，是将宽度不等的多个黑条和空白，按照一定的编码规则排列，用以表达一组信息的图形标识符，每一种商品都有一个唯一可追踪的条形码。常见的条形码是由反射率相差很大的黑条(简称条)和白条(简称空)排成的平行线图案。条形码可以标出物品的生产国、制造厂家、商品名称、生产日期、图书分类号、邮件起止地点、类别、日期等许多信息。
条码的分类多种多样，有商业通用条码和工业通用条码，一般分为一维码和二维码。目前在全球范围内，每天需要运用到条码扫描的次数已经超过上亿次，其应用范围也涉及到各个领域和行业，其中包括物流、仓储，图书馆，银行，pos收银系统，医疗卫生、零售商品、服装、食品服务以及高科技电子产品等等。
随着条形码标签的广泛应用，如何保证条形码标签难以伪造、易于识别、长期有效，已经成为防伪行业国际公认的防伪技术产品优劣的评价标准。防止“盗码造假”一直是本领域的研究热点。
发明内容
本发明所要解决的技术问题是提供一种微纹防伪方法，能够有效防止被盗后的防伪数据用于造假，几乎不增加生产印刷成本，且工艺简单，易于实施推广。
本发明为解决上述技术问题而采用的技术方案是提供一种微纹防伪方法，包括如下步骤：a)印刷形成具有随机锯齿边的编码标识或图文标识；b)对所印刷的编码标识或图文标识进行放大拍照，获取该编码标识或图文标识的锯齿特征照片；c)存储编码标识或图文标识的锯齿特征照片作为防伪特征备案信息。
上述的微纹防伪方法，其中，所述步骤a)中具有随机锯齿边的编码标识或图文标识的印刷过程如下：a1)向承印物上编码标识或图文标识的印刷区内预先印刷扩散剂涂层；a2)在扩散剂涂层上继续印刷构成编码标识或图文标识的油墨层；a3)控制编码标识或图文标识的锯齿高度为0.01mm～0.03mm。
上述的微纹防伪方法，其中，所述步骤a1)在印刷扩散剂涂层前先采用乙醇或丙酮对印刷区表面进行擦除处理，所述步骤a2)在油墨层中添加稀释剂和成膜剂，并控制油墨层的粘度为5～10mPa.S。
上述的微纹防伪方法，其中，所述步骤a)中具有锯齿边的编码标识或图文标识的印刷过程如下：选用平滑度为100～150s的纸张作为承印物；向承印物上印刷构成编码标识或图文标识的油墨层；在油墨层内添加质量百分含量为0.35～5.85％的醋酸乙烯－乙烯共聚乳液；控制编码标识或图文标识的锯齿高度为0.01mm～0.03mm。
上述的微纹防伪方法，其中，所述步骤b)对所印刷的编码标识或图文标识采用物距小于390mm的微距放大拍摄方式。
上述的微纹防伪方法，其中，所述步骤b)中的放大拍摄倍数为8～80倍。
上述的微纹防伪方法，其中，所述步骤c)首先对编码标识或图文标识进行比对，如果不一致直接反馈鉴定结论为假冒产品；如果编码标识或图文标识比对一致，则继续比对该编码或图文标识对应的锯齿特征照片。
上述的微纹防伪方法，其中，所述步骤c)采用手机拍摄承印物上的编码标识或图文标识，以获取具有个性化锯齿边的实物现场照片，然后再将实物现场照片上传至计算机防伪网络查询系统进行鉴定；如果编码相符，则反馈初步鉴定结论为真，并将最终鉴定结论的链接返回到用户手机上；在最终鉴定结论的链接被用户点开之前的一段时间里，计算机防伪网络查询系统将实物现场照片与预先备案存储的锯齿特征照片进行分析比对，做出最终鉴定结论，并等待用户点开链接、获取最终结论。
上述的微纹防伪方法，其中，所述步骤c)采用编码标识或图文标识进行首次防伪查询比对；如果对同一编码标识或图文标识进行两次及两次以上的防伪查询，则同时采集该编码标识或图文标识的锯齿特征照片进行比对验证。
上述的微纹防伪方法，其中，所述编码标识为序列号、一维条码、二维码、生产日期、产品批号、防伪数码、促销积分码、兑奖码、防窜货编码或产品溯源码。
本发明对比现有技术有如下的有益效果：本发明提供的微纹防伪方法，通过印刷形成具有锯齿边的编码标识或图文标识，存储编码标识或图文标识及其对应的锯 齿特征照片作为防伪特征备案信息，从而能够有效防止被盗后的防伪数据用于造假，几乎不增加生产印刷成本，且工艺简单，易于实施推广。
附图说明
图1为本发明的微纹防伪过程示意图；
图2为采用本发明的一个药品电子监管码的局部放大示意图；
图3为本发明的具有锯齿边的条形码剖面结构示意图；
图4为采用本发明的具有锯齿边的二维码结构示意图；
图5为采用本发明的一种包装物上的点阵喷码生产日期示意图。
图6为图5中(生产日期)的单个墨点放大示意图。
图中：
1单个墨点          2承印物          3油墨
4编码              5图文            6锯齿边
7转移层
具体实施方式
下面结合附图和实施例对本发明作进一步的描述。
图1为本发明的微纹防伪过程示意图。
请参见图1，本发明提供的微纹防伪方法，包括如下步骤：
步骤S1：印刷形成具有随机锯齿边的编码标识或图文标识，控制编码标识或图文标识的锯齿高度为0.01mm～0.03mm；
步骤S2：对所印刷的编码标识或图文标识进行放大拍照，获取该编码标识或图文标识的锯齿特征照片；
步骤S3：存储编码标识或图文标识的锯齿特征照片作为防伪特征备案信息。
本发明提供的微纹防伪方法，重点放在“如何防止被盗后的防伪数据用于造假”，而不像大多数同行那样将研究重点放在“如何防止防伪数据被盗”上。本发明通过实验发现：把一组编码，用喷墨打印机、在发票纸上打印1000次。用拍照手机对其进行微距拍照，然后将照片放大观察，结果显示这1000个编码的油墨边沿上、随机产生了一些微小锯齿。进一步观察发现，找不到两个连微小锯齿都一摸一样的编码。 换言之，用拍照手机作为放大镜来观察数码的油墨边沿，任何人(包括造假者)都无法复制出第二个连微小锯齿都一模一样的编码。进一步实验发现，所喷印的条码，其条码中每一条直线的边沿锯齿、也都不一样；现行发票号码中每一字符的边沿锯齿、也都不一样；以及矿泉水瓶盖上的生产日期等字符的边沿锯齿、也都不一样。
因此，本发明刻意印刷形成具有锯齿边的编码标识或图文标识，利用油墨边沿的锯齿，具有无法复制伪造、易于手机识别的特性，用来作为防伪识别特征。本发明涉及的主要术语的定义如下：
锯齿：是指编码/图文等油墨边沿上凸起来的锯齿(俗称毛刺)、或凹下去的锯齿(俗称豁口)，还包括激光模切边沿的锯齿、激光喷码(字符或线条边沿)的锯齿。
编码：用以唯一标识产品的号码，具体可以是以下各种编码的一种或多种，例如序列号、一维条码、二维码、生产日期、产品批号、防伪数码、促销积分码、兑奖码、防窜货编码、产品溯源码等等。
图文：泛指各种图形、文字、标点符号、笔划、点、线等。
锯齿边：是指编码/图文等油墨边沿上的、锯齿与纸面的交界曲线。锯齿边线是一条条随机弯曲的微曲线，具有随机性、唯一性、不可复制性。
下面详细介绍本发明的微纹防伪的各主要步骤的具体实现方法。
为了形成具有锯齿边的编码标识或图文标识，对于喷墨印刷机，可以通过延迟干燥、调稀油墨、油墨中添加慢干剂、在喷印位置事先印刷一个扩散底涂层、加吹侧风、喷雾干扰、碾压等措施，促使编码边沿油墨加速扩散而形成符合尺寸要求的锯齿。但是需要保证印刷编码开始时易于扩散，快速定型，后续又能保证可靠定型，不变形。为了更好地兼顾上述指标，本发明提供的一种优选印刷方法如下：
a1)向承印物上编码标识或图文标识的印刷区内预先印刷扩散剂涂层；
a2)在扩散剂涂层上继续印刷构成编码标识或图文标识的油墨层；
a3)控制编码标识或图文标识的锯齿高度为0.01mm～0.03mm，优选为0.029mm。研究发现：公众常用的、普及率最高的现行拍照手机，其摄像镜头的分辨率为500～1600万像素，公众用这种像素的拍照手机，可以清晰地拍摄记录下0.01-0.3mm的微小锯齿，这一微小尺寸的锯齿肉眼不能直接看见，因此不影响印刷包装的外观效果。同时考虑到现有的印刷精度越来越高，有的甚至要求误差不大于0.03mm，因此控制锯齿高度为0.01mm～0.03mm，不会影响印刷质量，即不会被误认为是印刷次品。如图2、图3和图4所示，在印刷线上，采用UV喷码机对输送过来的某种承印物2进 行喷码，将所喷印的电子油墨3充当冷烫胶水，将银色激光冷烫膜覆贴上去，经压辊碾压后再剥离，从而将银色转移层7转移到电子油墨3上去，生产出轮廓清晰的(无渐变色的)随机锯齿边6药品电子监管码。这样制作的药品电子监管码，随机锯齿边6轮廓清晰、无渐变色、易于防伪查询APP自动识别，且编码4表面具有金属光泽的随机的锯齿边特写照片。该个性化的锯齿边特写照片由于是随机从冷烫膜上截取下来的，因此极难二次(截取)套准、极难复制造假。
采用加吹侧风、喷雾干扰、碾压等措施会增加设备投资，并使得印刷工艺复杂化。因此，有必要进一步研究如何调整喷墨印刷工艺参数，使所喷印编码边沿的油墨易于随机扩散、从而产生一些无规律的毛刺等锯齿，并且保证锯齿尺寸为0.01mm-0.3mm。纸张平滑度是评价纸张表面凹凸程度的技术指标。目前普遍采用别克气流式平滑度测试仪测量，以真空条件下，一定体积的空气从一定压力(通常为100kPa)下的纸张试样与光滑玻璃间流过所需时间作为纸张平滑度数据。时间越长，说明纸张与玻璃表面的间隙越小，纸张表面平滑度越好。但是纸张表面越平滑，扩散效果则越差。
本发明优选采用容易导致扩散的的承印物，印刷过程如下：选用平滑度为100～150s的纸张作为承印物；向承印物上印刷构成编码标识或图文标识的油墨层；在油墨层内添加质量百分含量为0.35～5.85％的醋酸乙烯－乙烯共聚乳液。如图5、图6所示，选用Videojet1610DH染料墨水小字符喷码机，于灌装生产线上，在瓶盖上、在易拉罐上、在利乐包上、塑料件上，喷印七点阵字符类生产日期等编码4。为了将所喷出的单个墨点1变形，从而产生个性化锯齿边6，采用上述油墨层，不需要在灌装生产线上加设高压空气喷枪对所喷出的产日期等编码进行吹风，就能快速扩散墨水来喷印编码4，并可方便地控制编码4或图文5的锯齿高度为0.01mm～0.03mm。
此外，对于表面光滑的承印物，特别是塑料材质表面、金属表面，承印物表面有一层不干的油酯浮于面层，所述步骤a1)在印刷扩散剂涂层前可先采用乙醇或丙酮对印刷区表面进行擦除处理，以便后续的油墨层能够扩散形成随机的锯齿边；所述步骤a2)在油墨层中添加稀释剂和成膜剂，并控制油墨层的粘度为5～10mPa.S；所述成膜剂为纤维素类、酮类树脂和缩醛类中的至少一种，从而实现对油墨的包覆，保证成型后的锯齿特征不变形。
本发明提供的微纹防伪方法，所述步骤S2对所印刷的编码标识或图文标识采用物距小于390mm的微距放大拍摄方式；优选放大拍摄倍数为8～12倍，以便能够从 所拍摄的照片上、看清尺寸为0.01～0.03的微小锯齿的拍摄。每张50k-100k大小的照片就能清晰地记录编码边沿上0.01mm～0.3mm的锯齿。拍照任务可采用现行品检机来完成，拍照速度可与品检机相同，可达到0-150米/分。品检机是印企的标配，供应商广州丝艾、上海正伟、广州MCC、广州美祺、中山中荣等印企全部都有品检机。大部分品检机都具有拍照存储功能，少部分品检机需升级一下软件。采用本发明的锯齿防伪方法，无需专门投资拍照设备，现行印企都有现成的设备可用。当然，也可配备专门开发的放大拍照系统。
本发明提供的微纹防伪方法，所述步骤S3可以首先对编码标识或图文标识进行比对，如果不一致直接反馈鉴定结论为假冒产品；如果编码标识或图文标识比对一致，则继续比对该编码或图文标识对应的锯齿特征照片，从而更快更好地满足用户的查询需求。为了更好地提升用户体验，所述步骤S3中采用手机拍摄承印物上的编码标识或图文标识，以获取具有随机锯齿边的实物现场照片，然后再将实物现场照片上传至计算机防伪网络查询系统进行鉴定；如果编码相符，则反馈初步鉴定结论为真，并将最终鉴定结论的链接返回到用户手机上；在最终鉴定结论的链接被用户点开之前的一段时间里，计算机防伪网络查询系统将实物现场照片与预先备案存储的锯齿特征照片进行分析比对，做出最终鉴定结论，并等待用户点开链接、获取最终结论。此外，公众还可以使用手机调取预先备案存储的锯齿特征照片，自我观察编码锯齿是否相符，从而判别真伪。
为了加快查询比对效率，所述步骤S3采用编码标识或图文标识进行首次防伪查询比对；如果对同一编码标识或图文标识进行两次及两次以上的防伪查询，则同时采集该编码标识或图文标识的锯齿特征照片进行比对验证。
虽然本发明已以较佳实施例揭示如上，然其并非用以限定本发明，任何本领域技术人员，在不脱离本发明的精神和范围内，当可作些许的修改和完善，因此本发明的保护范围当以权利要求书所界定的为准。

Claims (10)

  1. 一种微纹防伪方法，其特征在于，包括如下步骤：
    a)印刷形成具有随机锯齿边的编码标识或图文标识；
    b)对所印刷的编码标识或图文标识进行放大拍照，获取该编码标识或图文标识的锯齿特征照片；
    c)存储编码标识或图文标识的锯齿特征照片作为防伪特征备案信息。
  2. 如权利要求1所述的微纹防伪方法，其特征在于，所述步骤a)中具有锯齿边的编码标识或图文标识的印刷过程如下：
    a1)向承印物上编码标识或图文标识的印刷区内预先印刷扩散剂涂层；
    a2)在扩散剂涂层上继续印刷构成编码标识或图文标识的油墨层；
    a3)控制编码标识或图文标识的锯齿高度为0.01mm～0.03mm。
  3. 如权利要求2所述的微纹防伪方法，其特征在于，所述步骤a1)在印刷扩散剂涂层前先采用乙醇或丙酮对印刷区表面进行擦除处理，所述步骤a2)在油墨层中添加稀释剂和成膜剂，并控制油墨层的粘度为5～10mPa.S。
  4. 如权利要求1所述的微纹防伪方法，其特征在于，所述步骤a)中具有随机锯齿边的编码标识或图文标识的印刷过程如下：选用平滑度为100～150s的纸张作为承印物；向承印物上印刷构成编码标识或图文标识的油墨层；在油墨层内添加质量百分含量为0.35～5.85％的醋酸乙烯－乙烯共聚乳液；控制编码标识或图文标识的锯齿高度为0.01mm～0.03mm。
  5. 如权利要求1所述的微纹防伪方法，其特征在于，所述步骤b)对所印刷的编码标识或图文标识采用物距小于390mm的微距放大拍摄方式。
  6. 如权利要求5所述的微纹防伪方法，其特征在于，所述步骤b)中的放大拍摄倍数为8～80倍。
  7. 如权利要求1所述的微纹防伪方法，其特征在于，所述步骤c)首先对编码标识或图文标识进行比对，如果不一致直接反馈鉴定结论为假冒产品；如果编码标识或图文标识比对一致，则继续比对该编码或图文标识对应的锯齿特征照片。
  8. 如权利要求6所述的微纹防伪方法，其特征在于，所述步骤c)采用手机拍摄承印物上的编码标识或图文标识，以获取具有个性化锯齿边的实物现场照片，然后再将实物现场照片上传至计算机防伪网络查询系统进行鉴定；如果编码相符，则 反馈初步鉴定结论为真，并将最终鉴定结论的链接返回到用户手机上；在最终鉴定结论的链接被用户点开之前的一段时间里，计算机防伪网络查询系统将实物现场照片与预先备案存储的锯齿特征照片进行分析比对，做出最终鉴定结论，并等待用户点开链接、获取最终结论。
  9. 如权利要求1所述的微纹防伪方法，其特征在于，所述步骤c)采用编码标识或图文标识进行首次防伪查询比对；如果对同一编码标识或图文标识进行两次及两次以上的防伪查询，则同时采集该编码标识或图文标识的锯齿特征照片进行比对验证。
  10. 如权利要求1～9任一项所述的微纹防伪方法，其特征在于，所述编码标识为序列号、一维条码、二维码、生产日期、产品批号、防伪数码、促销积分码、兑奖码、防窜货编码或产品溯源码。
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CN111738390B (zh) * 2020-06-29 2024-03-12 陈洪 一种防伪图像及其生成方法和应用
CN112801254A (zh) * 2021-02-07 2021-05-14 拍拍看(海南)人工智能有限公司 高精准锯齿防伪方法
CN112884106A (zh) * 2021-02-07 2021-06-01 拍拍看(海南)人工智能有限公司 点向锯齿防伪方法
CN113408526A (zh) * 2021-06-18 2021-09-17 深圳市数标国际科技有限公司 基于Handle标识定位的图像识别防伪方法及图像识别防伪系统
CN113656631A (zh) * 2021-08-20 2021-11-16 上海烟草集团有限责任公司 产品身份标识的生成方法、身份识别方法、装置与设备

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