It is a special paper used for letterpress printing. The properties of the paper are similar to newsprint. The water resistance, color purity, and smoothness of the paper surface are slightly better than newsprint. The ink absorption is more uniform, but the ink strength is worse than newsprint.
Referred to as letterpress paper. Suitable for letterpress printing paper. There are two types of roll paper and flat paper.
The general quantitative is 52g/㎡, 60g/㎡ and 70g/㎡. The basis weight of thin relief paper is 35g/㎡, 40g/㎡, 45g/㎡ and 48g/㎡.
The paper is white and smooth, uniform in thickness, and has good printability, opacity, ink absorption, no lint, no penetrating.
Bleached chemical wood pulp or bleached chemical straw pulp is used, and some mechanical wood pulp or deinked waste paper pulp is also used. After beating, sizing (with a sizing degree of not less than 0.25mm), and filling (talcum powder, kaolin, calcium carbonate) Or titanium dioxide, etc.), sometimes added with chemical additives, made by papermaking on a Fourdrinier paper machine.
Used for printing books, magazines and novels, etc.