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What reason causes composite gray paper become yellow, what's the solution?

by:NEW BAMBOO PAPER     2020-10-24
Composite gray paper is packaging most widely used nowadays, it has many characteristics, such as moisture, heat insulation, easy processing, but improper use may appear the phenomenon of turn yellow, this is how to return a responsibility? Gray paper manufacturer to tell you: because of gray paper fibre is uniform, and after more than a series of roller pressure light processing, so the composite gray paper texture is more closely, thickness is uniform, the paper is white and smooth, generally has a more uniform ink absorbency, off powder with less wool phenomenon, the paper is relatively strong and has a good degree of folding, but its water content is higher, generally around 10%, there is a very good scalability, this will give the printing a little impact. In addition, in the production practice to solve the problem of composite gray paper return yellow process, improve the condition of base paper production process, selection of high quality fluorescent whitening agent, color pigments and so on, is the best solution, only from the source to solve, can effectively inhibit yellowing phenomenon to appear.
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