What is printing paper? What does it do?

There are many kinds of paper. According to different uses, China's Ministry of Light Industry divides it into 17 (paper 1 1 and cardboard 6)? Paper 1 1 includes printing paper, writing paper, drawing, drawing paper, electrical insulation paper, cigarette paper, blotting paper, metering paper, photosensitive paper, transfer paper (base paper), industrial technology paper and wrapping paper. ? There are six kinds of cardboard: binding cardboard, box cardboard, insulating cardboard, industrial cardboard, building cardboard and shoemaking cardboard.

Step 2 use:

1. printing paper-among printing paper, there are papers with different properties and characteristics, such as newsprint, letterpress printing paper, offset printing paper, bible paper, map paper, ocean map paper, gravure paper, weekly newspaper, pictorial paper, whiteboard paper, writing paper, etc.

2. Newsprint-mainly used for printing newspapers and letterpress books and periodicals. Its paper is soft, elastic and plastic, and has strong ink absorption performance. Ink can be quickly fixed on paper, and paper is continuously pressed by calender. Smooth on both sides, not easy to fluff. Double-sided printing is clear and solid, with certain mechanical strength, suitable for high-speed rotary printing and good opacity. Because the raw materials used are mainly mechanical wood pulp, which contains essential elements and impurities for human body, the paper is not suitable for long-term storage, easy to turn yellow and brittle, with strong water absorption, poor water resistance and easy to be damaged.

3. Letterpress printing paper-mainly used for printing anthologies, classic works, general books, textbooks, magazines, etc. With a letterpress press. Its characteristics are similar to newsprint, its quality is better than newsprint, its smoothness, water resistance and whiteness are better than newsprint, and its ink absorption ability is not as good as newsprint, but its ink absorption is uniform.

4. Offset printing paper-mainly used for lithographic color pictorial, picture album, poster, color trademark and some advanced publications.

5. Offset paper can be divided into single-sided offset paper and double-sided adhesive paper, and single-sided bite paper is often used in color posters, cigarette cases, trademarks, etc. Double-sided tape is used to print pictures, illustrations, maps, etc. ?

6. Offset paper should be small in elasticity and strong in water resistance, so as to prevent paper from being deformed, overprint is not allowed, and it can't be brushed or peeled, so as to prevent the phenomenon of brushing and peeling caused by the adhesion tension of ink during repeated printing, which will make the imprint have white spots and affect the quality of printed matter; The ink absorption should not be too high, which can hinder the penetration of the adhesive in the ink, make the ink dry on the paper to form a film, and ensure the gloss of the printed matter; The surface is smooth, which ensures the authenticity of the imprint, and the paper can't have sand and other sundries to prevent the blanket and printing plate from being damaged. ?

7. Offset coated paper-also known as coated paper. It is made by coating a layer of inorganic coating on the paper coated with base paper and then super calendering. The paper has a smooth surface and high whiteness, and is specially used for offset printing monochrome or multicolor art pictures, illustrations, pictorial, picture books, trade marks, product samples, calendars, etc.

The earliest paper existed in the early years of the Western Han Dynasty 2200 years ago, but it was still rough and not widely used. 105, Cai Lun was considered as the originator of modern papermaking after improvement. ("Cyperus esculentus" is not the "paper" in the current concept, but a writing medium made by treating Cyperus esculentus with vegetable oil to a certain extent. China invented papermaking, which broke the original arrangement of plant fibers and made them cross randomly again, so that the finished product could be called "paper". )

Chinese characters were invented in the Shang Dynasty, and Oracle Bone Inscriptions was used as a writing material. During the Spring and Autumn Period, bamboo chips, wood chips and silk were discovered and used as writing materials. But because silk is too expensive and bamboo chips are too heavy, paper is produced. One of four great inventions of ancient china? [1], papermaking, together with compass, gunpowder and printing, provided a material and technical foundation for the prosperity of ancient culture in China. The invention of paper ended the complicated history of ancient bamboo slips and greatly promoted the spread and development of culture.

The map paper unearthed in Fangmatan, Tianshui, Gansu Province is the earliest pulp paper found in the world.

Sheets made of plant fibers are used for writing pictures, printing books and newspapers, packaging, etc. Unlike bamboo, bamboo is the "silk" of animal fiber. Paper: the general term for paper. Paper is counted by sheets, so paper is generally divided into: letterpress printing paper, newsprint, offset printing paper, coated paper, book cover paper, bible paper, copy paper, paperboard and so on.