Common types of paper used in printing factories: ① relief printing paper [Buke printing]

Common types of paper used in printing factories: ① relief printing paper [Buke printing]

Toppan printing paper, abbreviated as Toppan paper, is a new variety of paper suitable for letterpress printing of books and periodicals developed and produced by paper mills organized by the Ministry of Light Industry in the early 1950s based on China's poor wood resources and abundant grass resources. Quantify 52g/m3, 60g (m3 and 70g/m3). There is a distinction between roll paper and flat paper. The width of the roll paper is 787m, 880m, and 850mm; The specifications of flat paper are 787mm × 1092mm, 850 × 1168mm, and 880x1230m. Embossed paper is divided into three grades: A, B, and C. There are many grass resources that can be used to manufacture embossed paper, including reeds, wheat straw, rice straw, bamboo, sugarcane bagasse, etc. Among them, reed pulp is the best. Considering the readers' requirement for the paper not to bleed when annotating in the book, and to facilitate the penetration of ink during the printing process, an appropriate amount of glue and filler are added during the pulping process. About 80% straw pulp is combined with about 20% wood pulp and copied on a long web machine, which can also be produced using a circular web machine.

Common types of paper used in printing factories: ① relief printing paper [Buke printing]