Letterpress paper

Letterpress paper is the main paper used for printing books and magazines in letterpress. It is suitable for the text of important books, scientific books, academic journals, textbooks for universities and colleges, etc. Relief paper can be divided into four levels: No. 1, No. 2, No. 3, and No. 4 according to the distribution ratio of paper materials. The number of the paper represents the quality of the paper. The larger the number, the worse the paper quality.

Letterpress printing paper is mainly used for letterpress printing. The characteristics of this paper are similar to newsprint, but not exactly the same. Because the ratio of paper pulp and the knocking of the pulp are better than that of newsprint, the fiber structure of letterpress paper is relatively uniform, and the gaps between the fibers are filled with a certain amount of filler and glue, and they are also bleached This paper has good adaptability to printing. Slightly different from newsprint, its ink absorption is not as good as newsprint, but 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 ~ 60) ± 2g / m2
Flat paper specifications: 787 × 1092, 850 × 1168, 880 × 1230; there are also some special size paper.
Roll paper specifications: width 787, 1092, 1575;
Length about 6000 ~ 8000m


Newsprint, also known as white newspaper, is the main paper used for newspapers and books; it is suitable for newspapers, periodicals, textbooks, comic books and other text papers. The characteristics of newsprint are: the paper is light and light, and has good elasticity; the ink absorption performance is good, which ensures that the ink can be fixed on the paper surface; after the paper is calendered, the two sides are smooth and not lint, so that both sides The imprint is relatively clear and full; has a certain mechanical strength; good opacity; suitable for high-speed rotary printing.

This kind of paper is produced from mechanical wood pulp (or other chemical pulp) as a raw material, contains a lot of lignin and other magazines, it is not suitable for long-term storage. If the storage time is too long, the paper will turn yellow and become brittle, the water resistance is poor, and it is not suitable for writing. Printing ink or book ink must be used, the viscosity of the ink should not be too high, and the moisture of the printing surface must be strictly controlled during lithographic printing.

Weight: (49 ~ 52) ± 2g / m2
Flat paper specifications: 787 × 1092, 850 × 1168, 880 × 1230
Roll paper specifications: width 787, 1092, 1575: length about 6000 ~ 8000m [next]

Offset paper

Offset paper is mainly used by offset (offset) printing machines or other printing machines for printing higher-level color prints, such as color pictorials, picture books, posters, color printed trademarks, and some high-end book covers and illustrations.

Offset paper is divided into three types: special number, number one and number two according to the proportion of paper pulp. There are single-sided and double-sided, and there are two levels of super calendering and ordinary calendering.
Offset paper has low stretchability, uniform absorption of ink, good smoothness, tight and opaque texture, good whiteness, and strong water resistance. Should use conjunctival offset printing ink and better quality printing ink. The viscosity of the ink should not be too high, otherwise there will be de-powdering and pulling. It is also necessary to prevent the back from sticking and staining. Generally, anti-fouling agent, powder spraying or interleaving paper are used.

Weight: 50, 60, 70, 80, 90, 100, 120, 150, 180 (g / m2)
Flat paper specifications: 787 × 1092, 850 × 1168, 880 × 1230
Web specifications: width 787, 1092, 850:

Coated paper

Coated paper, also known as coated paper, is made by coating a layer of white paste on the base paper and calendering it. The surface of the paper is smooth, the whiteness is high, the paper fibers are evenly distributed, the thickness is uniform, the stretchability is small, it has good elasticity and strong water resistance and tensile properties, and it has good absorption and reception status for ink. Coated paper is mainly used for printing pictures, covers, postcards, exquisite product samples and color trademarks. When printing on coated paper, the pressure should not be too high, and offset printing resin ink and bright ink should be used. To prevent the back from sticking and staining, methods such as adding antifouling agent and dusting can be used. There are two types of coated paper, single-sided and double-sided.

Weight: 70, 80, 100, 105, 115, 120, 128, 150, 157, 180, 200, 210, 240, 250 (g / m2)
Among them: 105, 115, 128, 157 (g / m2) imported paper specifications are more flat paper specifications: 648 × 953, 787 × 970, 787 × 1092 (there is currently no domestic roll paper).
889 × 1194 is the specification of imported coated paper.

Draw a newspaper

The texture of the painted newspaper is white and smooth, and it is used to print pictorials, albums and posters.
Weight: 65, 90, 120 (g / m2)
Flat paper specifications: 787 × 1092 [next]

Written paper

Written paper, also called cover paper, is paper used for printing book covers. Pigments are added when writing paper, and they have gray, blue, beige and other colors.

Weight: 80, 100, 120 (g / m2)
Flat paper specifications: 690 × 960, 787 × 1092

Embossed paper

Pressed paper is a cover paper specially produced. There is a less obvious pattern on the surface of the paper. The colors are gray, green, beige and pink, and are generally used to print monochrome covers. Embossed paper is brittle and the spine easily breaks when bound. When printing, the paper has a large degree of curvature and it is difficult to feed paper, which affects the printing efficiency.

Weight: 120 ~ 40g / m2
Flat paper specifications: 787 × 1092

Dictionary paper

Dictionary paper is a kind of high-grade thin paper for books and periodicals. The paper is thin, strong and resistant to folding. The surface of the paper is white and delicate. Mainly used for printing dictionaries, dictionaries, manuals, classic books and books with many page numbers and easy to carry. Dictionary paper has high requirements on the pressure and ink color in the printing process, so special attention must be paid to the process when printing.

Weight: 25 ~ 40g / m2
Flat paper specifications: 787 × 1092 [next]

Unedged paper

Rough paper is thin and soft, light yellow, has no water resistance, and has good ink absorption. Unedged paper should only be printed on one side and is mainly used for costume books.

Writing paper

Writing paper is paper used for ink writing, and the paper is required to be stable when writing. Writing paper is mainly used for printing exercise books, diaries, forms and account books. The writing paper is divided into special numbers, number 1, number 2, number 3 and number 4.

Weight: 45, 50, 60, 70, 80 (g / m2)
Flat paper specifications: 427 × 569, 596 × 834, 635 × 1118, 834 × 1172, 787 × 1092
Web specifications: 787, 1092 [next]

Typing paper

The typewriting paper is a thin-page type paper, which is thin and flexible, and requires no holes when typing, and will not be scratched by the pen tip when rewriting with a hard pen. It is mainly used for printing documents, forms and multiple copies of duplicate certificates. Used as a sheet of interleaving paper and paper for printing and packaging in books. Typewriting paper has white, yellow, red, blue, green and other colors.

Weight: 24 ~ 30g / m2
Flat paper specifications: 787 × 1092, 560 × 870, 686 × 864, 559 × 864

Youfeng Paper

Youfeng paper is used for printing various copybooks and printing and packaging paper in printing.

Weight: 25 ~ 28 (g / m2)
Flat paper specifications: 787 × 1092

Copy paper

The copy paper is thin and flexible, suitable for printing multiple copies of this volume; it is used to protect art works and play a beautiful role in book binding.

Weight: 17 ~ 20 (g / m2)
Flat paper specifications: 787 × 1092 [next]

White paper

White plate paper has small elasticity, toughness, and is not easy to break when folded. It is mainly used for printing packaging boxes and merchandise decoration backing paper. In book binding, it is used for binding materials such as back cover of simple hardcover books and radial paper (ridge strips) in hardcover books.
White paper is divided into two types: powder white paper and ordinary white paper. According to the bottom layer, there are two kinds of gray background and white background.

Weight: 220, 240, 250, 280, 300, 350, 400 (g / m2)
Flat paper specifications: 787 × 787, 787 × 1092, 1092 × 1092

Kraft paper

Kraft paper has a high tensile force, with single light, double light, stripes, and no texture. It is mainly used for packaging paper, envelopes, paper bags, etc. and printing machine drum wrapping.
Flat paper specifications: 787 × 1092, 850 × 1168, 787 × 1190, 857 × 1120

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