1. Letterpress paper
Letterpress paper is the main paper used for letterpress printing books and magazines. Suitable for important works, scientific and technological books, academic publications and teaching materials of colleges and universities. Relief paper can be divided into four grades: No.1, No.2, No.3 and No.4 according to the composition ratio of paper materials. The number of paper represents the quality of paper, and the greater the number, the worse the paper quality.
relief printing paper is mainly used for relief printing. The characteristics of this kind of paper are similar to those of newsprint, but they are not exactly the same. The fiber structure of letterpress paper is relatively uniform, at the same time, the gaps between fibers are filled with a certain amount of fillers and sizing agents, and it is also bleached, which forms this paper with good adaptability to printing. Although its ink absorption is not as good as newsprint, it has the characteristics of uniform ink absorption; Water resistance and whiteness of paper are better than newsprint.
relief paper has the characteristics of uniform texture, lint-free, slightly elastic, opaque, slightly water-resistant and certain mechanical strength.
weight: (49-6) 2g/m2
Flat paper specifications: 787×192, 85×1168, 88× 123; There are also some special sizes of paper
Web specifications: width 787,192,1575
length about 6m-8m
2. Newsprint
Newsprint, also known as white newspaper, is the main paper for newspapers and books. Suitable for newspapers, periodicals, textbooks, comic books and other text paper. The characteristics of newsprint are: the paper is light and flexible; Good ink absorption, which ensures that the ink can be better fixed on the paper. After calendering, the two sides of the paper are smooth and lint-free, so that the prints on both sides are clear and full; Have certain mechanical strength; Good opacity; Suitable for high-speed rotary printing.
This kind of paper is made of mechanical wood pulp (or other chemical pulp) and contains a lot of lignin and other impurities, so it is not suitable for long-term storage. If the storage time is too long, the paper will become yellow and brittle, and the water resistance is poor, so it is not suitable for writing. Printing ink or book ink must be used, the viscosity of ink should not be too high, and the moisture content of the page must be strictly controlled during lithography.
weight: (49-52) 2g/m2
flat paper specifications: 787× 192,85× 1168,88× 123
web specifications: 787,192,1575; The length is about 6m-8m
3. Offset paper
Offset paper is mainly used for lithography (offset printing) presses or other presses to print advanced color printed matter, such as color pictorial, picture album, posters, color printing trademarks and some advanced book covers and illustrations.
offset paper is divided into special number, No.1, No.2 and No.3 according to the proportion of pulp, which can be divided into single-sided and double-sided, as well as super calendering and ordinary calendering.
Offset paper has small flexibility, uniform ink absorption, good smoothness, compact and opaque texture, good whiteness and strong water resistance. Conjunctival offset printing ink and good quality lead printing ink should be selected. The viscosity of ink should not be too high, otherwise there will be powder removal and galling. It is also necessary to prevent the back from sticking dirty, generally using anti-fouling agent, powder spraying or interlining paper.
weight: 5, 6, 7, 8, 9, 1, 12, 15, 18(g/m2)
flat paper specifications: 787×192, 85×1168, 88×123
web specifications: The paper has smooth surface, high whiteness, uniform distribution of paper fibers, uniform thickness, small flexibility, good elasticity, smooth surface, high whiteness, uniform distribution of paper fibers, uniform thickness, small flexibility, good elasticity, strong water resistance and tensile properties, and very good absorption and reception of ink. Coated paper is mainly used for printing picture books, covers, postcards, exquisite product samples and color trademarks. When printing coated paper, the pressure should not be too high, and offset printing resin ink and bright ink should be selected. To prevent the back from sticking dirty, methods such as adding anti-fouling agent and dusting can be adopted. There are two types of coated paper: single-sided and double-sided.
weight: 7,8,1,15,115,12,128,15,157,18,2,21,24,25 (g/m2)
in which: 15,115,128. 889×1194 is the specification of imported coated paper
5. Painted newspaper < P > The texture of painted newspaper is thin and smooth, and it is used for printing pictorial, picture books and posters.
weight: 65,9,12 (g/m2)
Flat paper specifications: 69× 96,787× 192
6. Written paper
Written paper is also called book cover paper, which is used for printing book covers. Written paper is made with pigments, such as gray, blue, beige and so on.
Weight: 8,1,12 (g/m2)
Specification of flat paper: 69× 69,787× 192
7. Embossed paper
Embossed paper is specially produced and used for cover decoration. There is an inconspicuous pattern on the surface of paper. The colors are gray, green, beige and pink, which are generally used to print monochrome covers. Embossed paper knees, the spine is easy to break when binding. When printing, the paper is bent, and it is difficult to feed paper, which affects the printing efficiency.
Weight: 12-4g/m2
Specification of flat paper: 787×192
Another classification method:
Super double-sided coated paper
Compared with ordinary coated paper, the paper has higher gloss and better smoothness, white and meticulous paper, bright printing color, excellent gradation and contrast, and is suitable for advanced color printed matter. Suitable for advanced books, catalogues, calendars, posters and covers.
Snow coated paper
Both sides are treated with special powder surface, so the paper is soft and elegant, with foggy effect, refreshing and comfortable vision, no reflection, high opacity, good printing color saturation and vividness, and excellent texture. Suitable for antique paintings, albums, calendars, magazines, books, special issues, catalogues, posters and other purposes.
Double-sided coated paper
Both sides of the paper are smooth and white, with good gloss and high opacity. After color printing, the pattern effect is bright and the color level is good, which is suitable for color printing. Suitable for general books, catalogues, calendars, posters, covers and other purposes.
one-sided coated paper
is coated and glued at the same time, so the paper is bright, smooth and uniform in ink absorption, which is suitable for single-sided color printing and can be glued on the back. Suitable for labels, posters, mounting and separating paper.
Super ivory Dowling
The paper color is ivory, which is soft and effective, non-reflective and non-dazzling, with high opacity and smooth paper surface, suitable for reading books.
cross-printed paper
The paper is soft in color, smooth and meticulous, non-reflective and non-dazzling, and suitable for advanced books and picture albums.
Baidaolin
Paper is white in color, good in thickness, produced by neutral sizing, and can be preserved for a hundred years without discoloration. Suitable for books, books, product manuals, envelopes, notepads, calendars, etc.
All-wood forest paper
The pulp is mainly long fiber, and the paper has strong tear resistance, excellent stiffness and high smoothness, which is the best grade paper for forest paper. Suitable for magazine inserts (transfer slips), books, product manuals, postcards, envelopes and desk calendars.
magazine paper (high-white magazine)
The paper is light, glossy and high-white. Therefore, compared with the general yellowish paper color, it can better show the printing contrast and color vividness, and it is the best thin-pound high-grade paper in China. Suitable for magazines, DM, books and periodicals, weekly magazines, color brochures and mail-order color publicity materials.
Snow-white forest paper
Paper is lightly coated, white as snow, smooth and meticulous, non-reflective and non-dazzling, suitable for advanced books and picture albums.
Super Tupperware
The paper has high brightness, smooth and detailed paper, and the printed products are in sharp contrast.