The
surface of the coated paper is white, smooth and flat, with high smoothness and
whiteness. It is a high-grade printing paper made of base paper coated with
white paint. Coated paper is one of the main papers used by Chinese printers. Moreover, it is
widely used in real life at present. The beautiful calendars, posters sold in
bookstores, book covers, illustrations, etc. that everyone sees are almost all
made of coated paper.
Coated
paper mainly used for printing covers and illustrations of advanced books. It
can be divided into single-sided coated paper, double-sided coated paper, matt
coated paper and cloth coated paper. According to the quality is divided into
A, B, C three grades. Commonly used coated paper is divided into various
thickness specifications from 105 grams per square meter to 350 grams per
square meter. In the sales of coated paper, the size of a single sheet is
generally divided into two sizes: large (889mm×1194mm) and medium (787mm×1092mm).
In the past, the quality of lithographic printing at that time was still low,
and high-level painting artworks such as classical oil paintings were copied,
and this paper was mainly used to print on photographic color copper plates
(letters). Quantities are 100, 120, 150, 180, 200, 250 grams square meters, and
the sheet packaging specifications are 787 × 1092 (mm), 880 × 1230 (mm).
The
main raw materials of coated paper are coated base paper and paint. It is widely
used by Chinese printers, the
requirements for the coated base paper are uniform thickness, small
flexibility, high strength and good water resistance. There should be no spots,
wrinkles, holes and other paper defects on the paper surface. The coating used
for coating is composed of high-quality white pigments (such as kaolin, barium
sulfate, etc.), adhesives (such as polyvinyl alcohol, casein, etc.) and
auxiliary additives. of. This kind of coating with high fluidity and high solid
content is brushed on the base paper thinly and evenly by the coating machine,
and then dried, rolled into a roll on the reel, and then sent to the super
calender for pressing. Light finishing, finally slitting, paper selection, and
packaging.
Coated
coated paper is pressed with an old felt. In addition to its smooth surface and
high whiteness, it also makes the printed graphics and pictures have a
three-dimensional effect. Therefore, this coated paper can be widely used for
printing pictorial, advertising, Landscape paintings, exquisite calendars,
portraits, etc.