Knowing copy paper, but what is anti-copy paper, many people should not know too much. In fact, anti-copy paper, as the name suggests, means to prevent others from forging important documents through illegal means. With this kind of paper, we don't have to worry about some important documents being stolen during office hours. So what exactly is copy paper and what are the types of copy paper? Rong Xiaobian came to tell you slowly.

Anti-copy paper is not the same as copy paper, mainly because it has some thoughts during the production process. It uses the ground color pattern to print, and hides the characteristics of the copy-proof paper of characters, patterns and patterns. It is printed on the paper with a ground pattern with almost no obstacles when reading or recognizing. This is a very fine dot pattern or hidden. Text, pattern printing. Once copied, the patterns or hidden words and patterns will be vividly revealed. The types of anti-copy paper that we often say are as follows:

The first type is VIOD logo paper. This is mainly because it contains a substance that prevents color copying. When a security document such as a trademark is copied by a color copier or scanned by a scanner, it will clearly display the word "VIOD". Printed in black and white. This VIOD logo can be used on packaging for CD-ROMs, computer software, cosmetics, and the like.

The second type is colored anti-copy paper, which is mainly made by coloring the base paper with a specific dye and pigment, and is exposed by copying. Since the image portion and the background have the same absorption, the contrast disappears. When the photoreceptor is exposed to almost full exposure, there is no contrast, and the copies are all blackened and it is impossible to form an image. The disadvantage of this method is that the original is not easily identifiable. The currently practical color is reddish brown.

The third type is photochromic anti-copy paper, which is also the most interesting one. Mainly to use the principle of lighting to achieve anti-counterfeiting effect. This copy-protected paper is coated with a chemically discolored (colored or achromatic color) material on the paper base, which is excited by the exposure to change color during the copying process, so that the contrast between the background portion and the image portion is not different and cannot be copied. After the original leaves the copier, the background portion returns to a colorless state.

In fact, the types of copy paper are photoluminescent anti-counterfeiting paper, fluorescent paper, diffuse anti-copy paper, etc. Xiaobian next time looking for an opportunity to talk about the rest of the anti-copy paper knowledge. Whether in the office or in our daily lives, the environment we use is made safer by the emergence of anti-copy paper.

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