Magnetic anti-counterfeiting technology on paper

The principle of the magnetic security paper is to apply a magnetic magnetic powder on the paper substrate, or to add the magnetic powder to the pulp in a special way when the paper is manufactured, so that the paper produced is magnetic. This magnetic paper is different from other ordinary papers in the part where the magnetic powder is added. In particular, it can be identified by a magnetic metal identifier or a magnetic induction device, thereby distinguishing it from other ordinary papers. Can be used to produce anti-counterfeit trademarks, anti-counterfeit magnetic account cards and computer identification magnetic anti-counterfeit labels on the packaging and so on.

Digital watermark paper

Digital watermarking is the use of signal processing methods to embed hidden tags in digital multimedia data. Such tags are usually invisible and can only be extracted by a dedicated detector or reader. It may be a text, an ID code of a product owner, a two-dimensional image, audiovisual information, a random sequence, or the like. It is mainly used for copyright protection, identity authentication, copy protection and media tracking. It can also be used for secure communication, multi-language film systems, network access rights restrictions, and media attachment information. It can be divided into visible watermark and invisible watermark. Visible watermarks can only be used for a fixed part of the image to identify the ownership of the work. The invisible watermark is visually invisible and is mainly used to identify the ownership of the work and the source of the tracked work.

Anti-copy paper

Anti-copying is to prevent the copying of originals through the copying machine and the originals are completely different products, which can prevent counterfeiting. The purpose of copy prevention is to make the copied text, graphics, and information content completely indecipherable. The anti-counterfeit technology paper can be divided into anti-copying papers that use hidden patterns to print hidden texts, patterns, and patterns; anti-copying papers that use coloring properties; anti-copying papers that contain photochromic materials; and copy prevention papers that contain thermochromic materials; Anti-copying paper containing photoluminescent material; anti-copying paper containing fluorescent substances; anti-copying paper using the principle of diffuse light emission and anti-copying paper using polarized light.

Thermal security paper

The thermal security paper is mainly obtained by coating a heat-sensitive substance on a paper base, and the heat reversible color change property of the heat-sensitive substance is used to identify authenticity. With heating color, cooling fade and repeated display features. At present, there are two main types of thermal security paper, namely liquid crystals and colorless dyes.

Photochromic security paper

The so-called photochromism is the quality of some of the characteristics of the light after the change, leave the light and return to the original color; photochromic anti-counterfeit paper is a security paper containing these substances. The existing photochromic anti-counterfeiting papers mainly have two types: First, ultraviolet photochromic anti-counterfeiting papers, which are currently the most widely used and most mature technologies, and almost all countries use UV photochromic inks to print money in banknotes. Anti-counterfeit mark; Bank identification, as long as the currency is placed under the UV lamp, you can see the specific part shows the security mark, leave the UV light source is not displayed. The other type is natural photochromic anti-counterfeiting paper. The light source for discoloration of this paper is natural light, including general indoor light, and not just direct sunlight. The application of this security paper is more convenient, but it has yet to be perfected.

Add fiber silk, color dot encrypted security paper

This security paper is made by adding fiber yarns or color dots to pulp during papermaking. The earliest form of this anti-counterfeiting paper is the addition of colored plant fibers in the pulp, which are commonly used in the following forms:

1 Add colored chemical fiber or fluorescent fiber to the pulp. The former is seen on the surface of the paper with the naked eye, and the latter must be visible under the irradiation of ultraviolet light. The color is mostly red, blue, orange, and the shape can be thick. Fine, long or short.

2 In the process of papermaking, metal wires, plastic wires coated with metal films on the surface, wires with fluorescence, films coated with optically variable materials, or magnetic materials are inserted into the paper layer. Such wires are difficult to reproduce in the copying process. Therefore, it is widely used as an effective anti-counterfeit measure.

(3) A material having an optically variable function (e.g., fluorescence, luminescence, or discoloration), typically a plastic film or a metal foil, is made into a shape such as a circular or polygonal small piece dispersed in the paper layer