IC card /smart card as an important information medium, the surface of the security processing system as a whole, an important part of distribution management need to be seriously considered. Surface of the card technology to address the underlying color pattern is printed. IC card, most of the surface pattern printed by offset lithography process. Offset printing process in the plastic surface characteristics, not only cards with artistic appreciation and collection, more importantly, it greatly increased the production of precision, specificity and complexity increase the difficulty and risk of forgery. Some simple color patterns, security ink printing text or also the use of screen printing. In addition, may also have some special signs, such as fluorescent security image printing, print color marking, laser engraving and signature images, micro-line technology, complex holographic image tags, borders and security background of micro-structure.
At present, the color PVC card has universal application. It not only can a different color photo, name and other personalized information printed on the card, plastic card and have changed the function of a single, easy to fake, easy to damage, easy to open plastic, no water, and other defects, the formation of the second floor now combined firm, waterproof, image effects, versatile features, and can adopt face recognition and attendance, access control, consumer and other functions in one. The production of PVC color portrait card, there are two, one is to use thermal transfer-type card printer to print directly on blank card surface, the higher the cost; the other is a color inkjet or laser printer to print to the content special PVC film base, in the laminated method, after pressing, punch, punch cards produce a finished product.
IC cards to enhance security effectiveness, and now there are multiple invisible optical cards, it is a hole with a clear optical cards and barcode cards clearly significant improvements in its structure, including card-based, calendar card,joint coatings, the information layer, protective layer , invisible layer and film. Kaji generally use PVC, ABS, PET and other plastic material, connected with a PVC coating materials generally, is a special material, which can be powdered material layer and the card-based information materials firmly together, and completely through. Information layer is mainly used toner, the optical properties of infrared absorption properties vary greatly with the card-based materials, and even compared to the contrary. Thin protective layer can be made of PVC material, and its role is to protect the information layer and the connection from hidden layer of coating. Hidden layer can be good for infrared transmission, while the low rate of visible light through the material, such as invisible ink, with deep color infrared light transmission PVC films. Its role is composed of the information point in the invisible layer of the area below the cover, making visual can not be found, in order to achieve the purpose of stealth. PVC film coating can be used, its role is invisible layer of protection is not exposed in the outermost layer, thereby enhancing the wear resistance of the card.
Multilayer optical card making invisible ordinary materials available at the time, prepared by the laser printer will print the information directly in the card-based materials, and finally by the heat lamination process will be pressed into the card layers of materials that form a security card. The card not only because of hidden layers of information can not be observed by the naked eye has better security information security effect, but also wear-resistant, anti-bending ability, reader stability, the convenience and low cost.
