Common paper for printing Use, variety and specifications
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There are many kinds of printed materials, their requirements for use and printing methods are different, so the corresponding paper must be selected according to the requirements and characteristics of the use and printing process. The use, variety and specifications of some commonly used papers are introduced below for reference by designers and publishing business personnel.
Letterpress paper Letterpress paper is the main paper used for letterpress printing of books and magazines. Applicable to important works, scientific books, academic journals, textbooks for colleges and universities, etc. The letterpress paper can be divided into four grades of No. 1, No. 2, No. 3 and No. 4 according to the distribution ratio of the paper materials. The number of papers 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, but not identical to, newsprint. Since the ratio of paper pulp to pulp is better than that of newsprint, the fiber structure of the letterpress paper is relatively uniform, and the gap between the fibers is filled with a certain amount of filler and rubber, and is also bleached, which forms This paper has a good adaptability 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.
The relief paper has uniform texture, no lint, slight elasticity, opacity, slight water resistance, and certain mechanical strength.
Weight: (49 ~ 60) ± 2g / m2
Flat paper specifications: 787 × 1092, 850 × 1168, 880 × 1230; there are some special size paper.
Web paper specifications: width 787, 1092, 1575;
The length is about 6000~8000m
Newsprint Newsprint is also called white paper, the main paper for newspapers and books; it is suitable for newspapers, periodicals, textbooks, comic strips and other text papers. The characteristics of newsprint are: paper is light and light, with good elasticity; good ink absorption performance, which ensures that the ink can be fixed on the paper surface; after the paper is calendered, both sides are smooth and no hair, so that the two sides The print is clear and full; has a certain mechanical strength; good opacity; suitable for high speed rotary printing.
This paper is made from mechanical wood pulp (or other chemical pulp) and contains a lot of lignin and other magazines. It should not be stored for a long time. If the storage time is too long, the paper will become yellow and brittle, and the water resistance is poor. 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 layout must be strictly controlled during lithography.
Weight: (49 ~ 52) ± 2g / m2
Flat paper specifications: 787 × 1092, 850 × 1168, 880 × 1230
Web paper specifications: width 787, 1092, 1575: length about 6000 ~ 8000m
Offset paper Offset paper is mainly used in lithographic (offset) printing presses or other printing presses to print higher-grade color prints, such as color prints, albums, posters, color labels and some advanced book covers and illustrations.
Offset paper is divided into three types according to the ratio of paper pulp, No. 1 and No. 2, and there are two sides, one side and two sides, and two levels of super calendering and ordinary calendering. The offset paper has small stretchability, uniform absorption of ink, good smoothness, tight opacity texture, good whiteness and strong water resistance. Conjunctival offset printing inks and good quality printing inks should be used. The viscosity of the ink should not be too high, otherwise powder removal and pulling will occur. Also to prevent the back side from getting dirty, generally use anti-dirty agent, dusting or lining paper.
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, the elasticity is good, the water resistance and tensile properties are strong, and the absorption and receiving state of the ink are very good. Coated paper is mainly used for printing albums, covers, postcards, exquisite product samples, and color labels. The pressure on the coated paper should not be too large, and the offset resin ink and the bright ink should be used. To prevent the back side from getting dirty, add anti-fouling agent, dusting, etc. Coated paper has two types, single and double.
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
Flat paper specifications: 648 × 953, 787 × 970, 787 × 1092 (currently there is no web in China). 889×1194 is the specification of imported coated paper.
Painting newspapers The texture of the newspapers is fine and smooth, and is used for printing pictorials, atlases and posters.
Weight: 65,90,120 (g/m2)
Flat paper specifications: 787 × 1092
Written paper Written paper is also called cover paper, which is the paper used to print the cover of a book. The paper is colored with paper, and is colored in gray, blue or beige.
Weight: 80,100,120 (g/m2)
Flat paper specifications: 690 × 960, 787 × 1092
Embossed paper Epoxy paper is a kind of cover decorative paper specially produced. The surface of the paper has a pattern that is not very noticeable. The colors are gray, green, beige and pink, and are generally used to print monochrome covers. The embossed paper is brittle and the spine is easily broken when bound. The paper has a large degree of curvature during printing, and paper feeding is difficult, which affects printing efficiency.
Weight: 120～40 g/m2
Flat paper specifications: 787 × 1092
Dictionary paper Dictionary paper is a kind of high-grade thin book paper. The paper is thin and strong and resistant. The paper surface is white and fine, the texture is tight and smooth, slightly transparent, and has certain water resistance. It is mainly used for printing dictionaries, dictionaries, manuals, classic books and books with many pages and easy to carry. Dictionary paper has high requirements on the pressure and ink color in the printing process, so the process must pay special attention to the process.
Weight: 25 ~ 40g / m2
Flat paper specifications: 787 × 1092