Coated paper is a more advanced variety of white board paper. Coated paper is a kind of hard board with large thickness and quantity, so it is also known as white board. It is a more advanced kind of board. White board paper is composed of surface layer, core layer and bottom layer, it has single-sided and double-sided two series, double-sided white board paper is also known as white card paper. The surface layer and bottom layer of white card paper are made of 100% bleached chemical wood pulp, or bleached rag pulp and bleached chemical straw pulp are mixed, and appropriate amount of filler, glue and whitening agent are added; The core layer of coated paper is made of mechanical wood pulp or waste paper pulp, reed pulp and straw pulp.