How to choose the right paper ink for different paper products？

There are many types of printed matter, and different printed matter often requires the use of different types of paper. The varieties and specifications of some commonly used printing papers are now introduced as follows:

1. Letterpress paper

Letterpress paper is the main paper used for printing books and magazines on letterpress. Letterpress paper can be divided into four levels: No. 1, No. 2, No. 3, and No. 4 according to the different distribution ratios of paper materials. The number of 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 machines. The properties of this paper are similar to newsprint, but not exactly the same. Because the ratio of the paper pulp and the dissolution of the pulp are better than newsprint, the fiber structure of letterpress paper is more uniform, and the gaps between the fibers are filled with a certain amount of fillers and sizing materials, and they are also bleached to form To improve the adaptability of this paper to printing. It is slightly different from newsprint. Although its ink absorption is not as good as newsprint, it has the characteristics of uniform ink absorption; water resistance and paper whiteness are better than newsprint. Letterpress paper has the characteristics of uniform texture, lint-free, slightly elastic, opaque, slightly water-resistant, and certain mechanical strength.

Weight: 49～60)±2g/m2.

The specifications of flat paper: 787×l092 mm, 850×ll68 mm, 880×l230 mm; and some paper of special size specifications.

Roll paper specifications: width 787mm, 1092mm, 1575mm, length is about 60m～8000m.

2. Newsprint

Newsprint, also called white newspaper, is the main paper used in newspapers and books. The characteristics of newsprint are: the paper is soft and has good elasticity; the ink absorption performance is good, which ensures that the ink is fastened on the paper; the two sides of the paper are smooth and lint-free after calendering, so that the prints on both sides are compared. Clear and full; with certain mechanical strength; good opacity; suitable for high-speed rotary printing. This paper is produced with mechanical wood pulp (or other chemical pulp) as raw materials and contains a large amount of lignin and other impurities. Not suitable for long-term storage. If the storage time is too long, the paper will turn yellow and become brittle, have poor water resistance, and is not suitable for writing. The printing ink or book ink must be used, and the viscosity of the ink should not be too high. The moisture content of the plate must be strictly controlled during lithography.

Weight: 49～52) ±2g/m2.

Flat paper specifications: 787×1092 mm, 850x ll68 mm, 880x l230 mm.

Roll paper specifications: width 787 mm, 1092 mm, 1575 mm; length is about 6000-8000 meters.

3. Offset paper

Offset paper is mainly used for offset (offset) printing machines or other printing machines to print higher-level color prints, such as color pictorials, picture albums, posters, color printing trademarks and some advanced books, as well as book covers, illustrations, etc. Offset paper is divided into special grade, No. 1 and No. 2 according to the proportion of paper pulp. There are single-sided and double-sided, and there are two grades of super calender and ordinary calender.

Offset paper has small stretchability, uniform ink absorption, good smoothness, compact and opaque texture, and good whiteness. Strong water resistance. Conjunctival type offset printing inks and better quality lead printing inks should be used. The viscosity of the ink should not be too high, otherwise the phenomenon of powder removal and fuzzing will occur. Also to prevent dirt on the back side, generally use anti-dirt agent, dusting or interleaving paper.

Weight: 50, 60, 70, 80, 90, 100, 120, 150, 180 g/m2.

Flat paper specifications: 787 × 1092 mm; 850 × 1168 mm.

Web specifications: 787 mm, 1092 mm, 850 mm.

4. Coated paper

Coated paper is also called printing coated paper. This kind of paper is coated with a layer of white paste on the base paper and pressed. It is made of light. The surface of the paper is smooth, the whiteness is high, the paper fiber is evenly distributed, the thickness is uniform, the flexibility is small, it has good elasticity and strong water resistance and tensile performance, and absorbs ink Sex and reception are very good. Coated paper is mainly used for printing picture albums, covers, postcards, exquisite product samples and color trademarks. The pressure should not be too high when printing on coated paper, and offset printing resin ink and bright ink should be used. To prevent the back from sticking and dirty, you can use anti-dirty agent, powder spraying and other methods.

Weight: 70, 80, 100, 120, 150, 180, 200, 210. 240, 250 g/m2.

Flat paper specifications: 648×953 mm, 787×970 mm, 787×1092 mm

5. Draw newspaper

The texture of the painted newspaper is fine white and smooth, and it is used to print pictorial newspapers, atlases and posters. Weight: 65, 91 and 12 g/m2

Flat paper specifications: 787×l092 mm.

6. Written paper

Written paper, also called book cover paper, is the paper used for printing book covers. Written paper is made of paper with pigments, such as gray, blue, beige and other colors.

Weight: 120 g/m2.

Flat paper specifications: 690×960 mm, 787×l092 mm.

7. Embossed paper

Embossed paper is a kind of decorative paper specially produced. The surface of the paper has a pattern that is not very obvious. The colors are divided into gray, green, beige and pink, and are generally used to print monochrome covers. Embossed paper is brittle, and the spine is easy to break when binding. When printing, the paper has a large curvature and it is difficult to feed the paper, which affects the printing efficiency.

Weight: 150～180g/m2.

Flat paper specifications: 787×l092 mm, 850×ll68 mm.

8. Writing paper

Writing paper is paper for writing with ink, and the paper requires that you do not swallow when writing. Writing paper is mainly used for factory printing exercise books, diaries, forms and account books. Writing paper is divided into special number, No. 1, No. 2, No. 3 and No. 4.

Weight: 45, 50, 60, 70, 80 g/m2.

Flat paper specifications: 427×569 mm, 596×834 mm, 635×ll18 mm, 834×ll72 mm, 787×l092 mm.

Web specifications: 787 mm, 1092 mm.

9. Typing paper

Typing paper is a thin-page type of paper. The paper is thin and flexible. It must not be pierced when typing, and it will not be scratched by the tip of the pen when it is copied with a hard pencil. Mainly used for printing documents, forms and multi-copy vouchers, etc. It is used as interleaf paper and printing and packaging paper in books. The typing paper is available in white, yellow, red, blue, green and other colors. Weight: 20～25g/m2.

Flat paper specifications: 787×l092 mm, 560×870 mm, 686×864 mm, 559×864 mm.

10. Corbett paper

The paper is thin and tough, so it is suitable for printing multi-copy booklets; it is used in book binding to protect art works and play a beautiful role.

Weight: 17-20g/m2.

Flat paper specifications: 787×l092 mm.

11. Kraft paper

Kraft paper has a high tensile strength, such as single gloss, double gloss, stripes, and no grains. Mainly used for packaging paper, envelopes, paper bags, etc. and printing press drum linings, etc.

Flat paper specifications: 787×1092mm, 850xll68mm, 787×ll90mm, 857×ll20mm.

Remarks: This article is reproduced from BAIDU Encyclopedia.