The application of silica in the paper industry cannot be replaced by carbon black The fine powder of silica can be used as a sizing agent for paper, thereby improving the whiteness and opacity of the paper, and improving the printability, oil resistance, abrasion resistance, hand feel and gloss. When used in printing drawings, the surface quality of the paper can be better, the ink is more stable, and there is no gap on the back; when used in azide paper, high-quality drawings can be produced.
When used in coated paper, it can replace titanium dioxide;

Especially for newsprint, adding 1-2% white carbon black, the weight of the paper is 10% lighter than the original, the paper is thin and can improve the strength, it also prevents the penetration of ink, and can also make the printed text clear, and at the same time Increase opacity.

First of all, it can be distinguished from the use, the two can be used in common, but cannot replace each other. Silica is mainly used in rubber, ceramics, etc.