This anti-counterfeiting paper is made by adding fiber filaments or colored dots to the pulp during the papermaking process. The earliest form of this anti-counterfeiting paper is to add colored plant fibers to the pulp. Currently, the following forms are commonly used:
â‘ Add colored chemical fibers or fluorescent fibers to the pulp, the former can be seen on the paper with the naked eye, the latter must be visible under the irradiation of ultraviolet light; its color is mostly red, blue, orange, and the shape can be coarse Can be thin, long or short;
â‘¡In the papermaking process, insert metal wire, plastic wire coated with metal film on the surface, metal wire with fluorescence, film coated with optical mutagenic material or magnetic material into the paper layer.This kind of wire is difficult to reproduce during the copying process. Therefore, it is widely used as an effective anti-counterfeiting method;
â‘¢Disperse the material with optical change function (such as fluorescence, luminescence or color change), usually plastic film or metal sheet, into small pieces of certain shape such as circle or polygon in the paper layer; its characteristic is to use the naked eye Recognizable, and the copier is difficult to reproduce.
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