Purpose, variety and specification of the most pop

The purpose, variety and specification of commonly used paper for printing

there are many kinds of printing materials, and their use requirements and printing methods are different, so the corresponding paper must be selected according to the requirements and characteristics of use and printing process. The uses, varieties and specifications of some commonly used publishing papers are introduced as follows for the reference of designers and publishing professionals

letterpress paper letterpress paper is the main paper used in letterpress printing of books and magazines. It is suitable for important works, scientific and technological books, academic journals, college and technical secondary school textbooks and other text paper. Relief paper can be divided into four levels: No. 1, No. 2, No. 3 and No. 4 according to the different composition of paper materials. The number of paper represents the quality of paper. The larger the number, the worse the paper

relief printing paper is mainly used for relief printing. The characteristics of this kind of paper are similar to that of paper, but not exactly the same. Because the ratio of pulp and the beating of pulp are better than paper, the fiber structure of letterpress paper is relatively uniform, and the gap between fibers is filled by a certain amount of filler and rubber, and it is also bleached, which forms this kind of paper has good adaptability to printing. Slightly different from paper, its ink absorption is not as good as paper, but it has the characteristics of uniform ink absorption; The water resistance and whiteness of paper are better than that of paper

relief paper has the characteristics of uniform texture, no fuzzing, slight elasticity, opacity, slight water resistance, and certain mechanical strength

weight: (49 ~ 60) ± 2g/m2

flat paper specification: 787 × 1092，850 × 1168，880 × 1230； There are also some special size papers

web specification: width 78710921575

length: about 6000 ~ 8000m

paper

paper is also called white newspaper, which is the main paper for newspapers and books; Suitable for newspapers, periodicals, textbooks, comics and other text paper. The characteristics of paper are: paper is light and elastic; Good ink absorption performance, which ensures that the ink can be more firmly fixed on the paper; After calendering, both sides of the paper are smooth and lint free, so that the imprints on both sides are clear and full; Have certain mechanical strength; Good opacity; Suitable for high-speed rotary printing

this paper is produced from mechanical wood pulp (or other chemical pulp) and contains a lot of lignin and other magazines, which is not suitable for long-term storage. If the storage time is too long, the paper will turn yellow and brittle, and the water resistance is poor, so it is not suitable for writing, etc. Printing ink or book ink that plays an important role in the process of building energy interconnection must be used. The viscosity of the ink should not be too high. The moisture of the page must be strictly controlled during lithography

weight: (49 ~ 52) ± 2g/m2

flat paper specification: 787 × 1092，850 × 1168，880 × 1230

Web specification: width 78710921575:

length: about 6000 ~ 8000m

offset paper

offset paper is mainly used for lithographic (offset) printing machines or other printing machines to print higher-level color prints, such as color pictorials, picture albums, posters, color printing commercial marks, and some advanced book covers, illustrations, etc

offset paper is divided into special size, No. 1 and No. 2 according to the proportion of paper size, including single-sided and double-sided, as well as super calendering and ordinary calendering

offset paper has small flexibility, uniform absorption of ink, good smoothness, tight texture, opaque, good whiteness and strong water resistance. Conjunctival offset printing ink and lead printing ink with good quality should be selected. The viscosity of the ink should not be too high, otherwise there will be de dusting and galling. It is also necessary to prevent the back from sticking dirty. Generally, Anti Dirt agent, powder spraying or lining paper are used

weight: 50, 60, 70, 80, 90100120150180 (g/m2)

flat paper specification: 787 × 1092，850 × 1168，880 × 1230

Web specification: width 7871092850

coated paper

coated paper, also known as coated paper, is made by coating a layer of white slurry on the base paper and calendering. The surface of the paper is smooth, the whiteness is high, the paper fiber is evenly distributed, the thickness is consistent, the elasticity is small, there is good elasticity and strong water resistance and tensile properties, and the absorption and reception of ink are very good. Coated paper is mainly used for printing picture books, covers, postcards, exquisite product samples and color trademarks. When printing on coated paper, the pressure should not be too high. Offset resin ink and bright ink should be selected. To prevent the back from sticking dirty, add Anti Dirt agent, spray powder and other methods. Coated paper has two types: single-sided and double-sided

weight: 70, 80100105115120h. Safety device: overload emergency stop device, up and down travel limit device, automatic breakpoint stop function, 128150157180180200210240250 (g/m2)

among them: 105115128157 (g/m2) imported paper specifications are more

flat paper specifications: 648 × 953，787 × 970，787 × 1092 (at present, its ability to resist deformation has been enhanced in China, and there is no web paper). eight hundred and eighty-nine × 1194 is the specification of imported coated paper

painting newspaper

the texture of painting newspaper is fine white and smooth, which is used for printing pictorials, brochures and posters

weight: 65, 90120 (g/m2)

flat paper specification: 787 × 1092

book paper

written paper is also called book cover paper, which is used to print the cover of books. When making paper, the book paper is colored with grey, blue, beige and other colors

weight: 80100120 (g/m2)

flat paper specification: 690 × 960，787 × 1092

embossing paper

embossing paper is a kind of cover decorative paper specially produced. There is a less obvious pattern on the surface of the paper. The color is divided into gray, green, beige and pink, which are generally used to print monochrome covers. Embossed paper is fragile, and the spine is easy to break when binding. When printing, the paper bending is large, and it is difficult to feed paper, which affects the printing efficiency

weight: 120 ~ 40 g/m2

sheet paper specification: 787 × 1092

dictionary paper

dictionary paper is a kind of high-grade thin paper for books and periodicals. The paper is thin, strong, tough and folding resistant. The paper surface is white and impenetrable. Money invades the muddy and meticulous, 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 for pressure and ink color in the printing process, so special attention must be paid to the printing process

weight: 25 ~ 40g/m2

sheet paper specification: 787 × 1092

felt paper

felt paper is thin and soft, light yellow, has no water resistance, and has good ink absorption. Woolen edged paper should only be printed on one side, mainly for ancient books

writing paper

writing paper is the paper for ink writing, and the paper is required not to bleed when writing. Writing paper is mainly used for 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 specification: 427 × 569，596 × 834，635 × 1118，834 × 1172，787 × 1092

web specification: 7871092

typing paper

typing paper is a thin sheet of paper, which is thin and flexible. It is required not to punch holes when typing, and it will not be scratched by the nib when copying with a hard pen. It is mainly used for printing documents, forms and multiple duplicate vouchers. It is used as interleaving paper and printing and packaging paper in books. The typing paper has white, yellow, red, blue, green and other colors

weight: 24 ~ 30 g/m2

sheet paper specification: 787 × 1092，560 × 870，686 × 864，559 × 864

postal paper

postal paper is used for printing all kinds of carbon copies and printing and packaging paper in printing

weight: 25 ~ 28 (g/m2)

flat paper specification: 787 × 1092

copy paper

copy paper is thin and tough, suitable for printing multi copy copies of this book; It is used to protect art works and play an aesthetic role in book binding

weight: 17 ~ 20 (g/m2)

sheet paper specification: 787 × 1092

white paper white paper has small flexibility, toughness, and is not easy to break when folded. It is mainly used for printing packaging boxes and commodity decoration lining paper. In book binding, it is used for the inner seal of paperback and hardcover books and binding materials such as diameter paper (ridge strip) in hardcover books

white paper can be divided into two categories: powdered white paper and ordinary white paper. According to the classification of the bottom layer, there are two kinds of gray background and white background

weight: 220240250280300350400 (g/m2)

flat paper specification: 787 × 787，787 × 1092，1092 × 1092

kraft paper kraft paper has a high tension, including single light, double light, stripes, no lines, etc. It is mainly used for wrapping paper, envelopes, paper bags, etc. and the cylinder lining of printing machines

flat paper specification: 787 × 1092，850 × 1168，787 × 1190，857 × 1120