What is the concept and difference of white cardboard and copper paper in the paper industry?

　　There are many categories in paper, including white cardboard and copper paper, two common important categories. Many people do not know what is the difference, do not know where to use, we use this article to give Everybody talks about their concepts and differences in detail.

　　White cardboard is a strong, thick, thick paper. The most common paper jams are not colored and they are known as white cardboard. If colored, the color is called color paper. The main purpose of white cardboard is to print business cards, certificates, invitations, covers, calendars for the month, postal postcards, etc.

　　The white cardboard name is "white", so the whiteness requirement is very high. The whiteness of A, etc. is not lower than 92%, B is not less than 87%, C is not less than 82%. If the whiteness exceeds 90%, it is a bit "bright and dazzling". It is also required to have high stiffness, bursting resistance and smoothness, paper surface smoothness, no streaks, spots and other paper diseases, and warping deformation phenomenon is also not allowed.

　　The single copper paper surface is bright, uniform in coating, and quickly absorbs ink with good printability, and is suitable for exquisite color printing. For the purpose of exquisite printing, the surface of the base paper is coated with a coating material and coated with a super-calender machine.

　　Double copper paper is divided into single-sided and double-sided coated copperplate paper, with a coating weight of about 10g/m2 or more per side according to the Japanese Paper Industry Classification Standard. It is the most commonly used for cultural publishing, advertising design, printing and binding, and industrial and commercial circles. One of the paper types.

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