What are the commonly used printing paper? Printing paper basics

What are the common printing papers

1. Offset paper (Dowling)

Offset paper is divided into three kinds according to the ratio of pulp material: special, No. 1 and No. 2, single-sided and double-sided, and two grades of super calendering and ordinary calendering. Paper weight of 50, 60, 70, 80, 90, 100, 120, 150, 180 (g / m2), which is commonly used double-sided offset paper has 70, 80, 90, 100, 120 (g / m2), single-sided offset paper has 50, 60, 70, 80 (g / m2) and so on.

Offset paper has small expansion and contraction, uniform absorption of ink, good smoothness, tight opaque texture, good whiteness and strong water resistance. Used in the manufacture of thin paper packaging decorative prints. Offset paper printing paper should not be stacked too high, especially when the smoothness of the high ink volume of prints to prevent the back of the sticky dirty, generally use anti-dirty agent, spray powder or lined paper. Should be used in conjunctive offset printing ink and better quality lead printing ink. The viscosity of the ink should not be too high, otherwise there will be de-powdering, pulling phenomenon.

Flatbed paper specifications: 787 x 1092, 850 x 1168, 880 x 1230 (mm x mm).

Roll specifications: width 787, 1092, 850 (mm).

Uses: Offset paper is mainly used for lithographic (offset) printing presses or other printing machines to print more ** color prints, such as color pictorials, albums, posters, color printing of trademarks and some book covers, illustrations and so on.

2、 Copperplate paper

Copperplate paper, also known as coating paper, this paper is coated with a layer of white pulp on the original paper, after super calendering processing treatment, made of printing paper, also known as printing coating paper. Higher whiteness, uniform distribution of paper fibers, uniform thickness, small stretch, good elasticity and strong water resistance and tensile properties, ink absorption and reception state is very good. Copperplate paper printing pressure should not be too large, to use offset resin-based ink as well as glossy ink. To prevent the back of the sticky dirty, can be used to add anti-dirty agent, spray powder and other methods.