Wet-pressed paper trays are common packaging in the market. At present, white wet-pressed paper trays are commonly used. However, the whiteness of white paper trays on the market varies greatly. How to deal with wet-pressed paper trays to show whiteness?
Because the pulp fiber has a yellow to off-white nature, it is difficult to appear pure white even after bleaching. This leads to the fact that although there are many white wet pressed paper tray products on the market, due to the difference in raw materials and processing technology, the paper tray The degree of whiteness is also quite different.
At present, in the whitening method of wet pressed paper trays, it is more common to choose to add dyes such as royal blue and turquoise blue to the pulp, and make it appear relatively pure white through dyeing and toning. This method is called whitening. For pulp with higher whiteness, we mostly use some fluorescent whitening agents to increase the brightness of the white color, which can also make the wet pressed paper tray play a role in whitening.
In addition to creating bright white paper trays, different colors can be customized as needed. By adding water-based dyes to the original pulp, we can provide customers with diversified wet-pressed paper tray products, making wet-pressed paper trays personalized Lined product packaging!
