I don't know if I can remember that Xiaobian told you about some of the anti-copy papers. I am going to continue with the content that you will not finish. I hope that these little knowledge can still help you. Then we will cut into the topic directly to continue to talk about the classification of anti-copy paper.
The first one is a photoluminescent anti-counterfeit paper that achieves the anti-counterfeiting effect by utilizing the characteristics of copy exposure, which is mainly caused by light excitation after exposure, so that a white state is formed when copying, and So that you can't be copied normally, this really achieves the anti-counterfeiting effect.
The second type is fluorescent paper. Some people say that fluorescent paper can achieve the anti-counterfeiting effect. In fact, it mainly uses the length of the emission wavelength of the fluorescent substance in the process of copying, so that the copy becomes black or white, and the anti-counterfeiting The purpose of copying. However, this kind of paper should pay attention to the fact that fluorescent additives or fluorescent fibers are often added during the production process, so we should pay special attention when using them.
The third type is diffused anti-copy paper, which is coated on the surface of the paper with a small diameter and a high emissivity material, such as aluminum powder, 10 grain titanium dioxide, and red inner glass particles. Etc., by the diffuse emission of the paper surface to cover or reduce the contrast between the paper and the image, so that the copy is black to achieve the purpose of copy prevention.
The fourth type is a polarization-proof copy paper. The anti-copy paper is formed by coating a polarizing film on a paper base, and utilizing the dichroism of light during copying to reduce the contrast between the word and the paper on the photosensitive drum, so that the copy is black.
The last one is thermochromic anti-copy paper, which is mainly coated with a material that changes according to the temperature at the time of copying, so that copying cannot be performed normally. Usually we are making copies. The color developed by the copying machine causes the contrast between the image portion and the background to disappear and cannot be copied. When the color is restored to normal temperature, the original part becomes the original colorless state. If it is a genuine paper purchased from a regular store, the additive it generally uses is a fluoranin achromatic colorless material, a phenol color developer, an aminophenylmercury dithizone salt, and the like.
The appearance of anti-copy paper has brought a lot of convenience to our lives, but this kind of anti-copy paper usually adds some additives in the process of production, so we should be careful when using it. Don't accidentally eat it.
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