Is letterpress paper used for printing books?

Letterpress paper is the main paper used in letterpress printing books and magazines. It is suitable for main text paper such as important works, scientific and technological books, academic journals and textbooks for colleges and technical secondary schools. Letterpress paper can be divided into four grades of No. 1, No. 2, No. 3 and No. 4 according to the proportion of paper materials. The number of the paper represents the quality of the paper. The larger the number, the worse the paper.