In the production printing process, a large amount of printing material is consumed. There are many types of printing materials, so the types of printing consumables are relatively large. Among all kinds of printing consumables, paper is the one that is used the most and consumes the most. What are the paper materials in printed materials?
In the printing industry, paper materials are generally divided into the following categories:
1. Flat paper and some special size papers, such as web;
2. Letterpress paper: Letterpress paper can be divided into four categories: No. 1, No. 2, No. 3, No. 4 according to the distribution of paper materials. The larger the number, the worse the paper quality. The main function of letterpress printing paper is for the letterpress printing machine, which is opaque, slightly water resistant, and has certain mechanical strength and elasticity.
3. Coated paper: A layer of white paste is calendered. The paper fiber has uniform distribution, smooth surface, small stretchability, good elasticity and tensile properties;
4 offset paper: mainly used to print higher-grade color prints, such as color printing trademarks and some advanced books, posters and book cover illustrations.
5. Newsprint. Its characteristics are: rich in flexibility; have a certain mechanical strength; good ink absorption; good opacity
6. Draw a newspaper: The texture of the printed newspaper is smooth and can be used for printing pictures.
7. Written paper: used to print the surface of books.
8. White paper: mainly used for printing packaging boxes and commodity sulphonated paper, not easy to break
9. Edge paper: Raw edge paper is mainly used for costume books, and should only be printed on one side. The paper is light yellow, thin and soft;
10. Writing paper: Writing paper is mainly used for printing of exercise books, forms and books.
11. Dictionary paper: white paper, smooth texture, strong and folding, slightly transparent, water resistant. Mainly for printing dictionaries.
12. Kraft paper: mainly used for wrapping paper, envelopes, etc. Kraft paper has a tensile force, such as single light, double light, stripes, no grain, and the like.
Printed paper has a wide variety of uses and is widely used. It involves the printing and packaging of various books and materials, and we often come into contact with it in life. For example, the books we read, the dictionaries we read, and the like are all related to printed paper. The consumption of printing consumables is large and can be improved through some technical improvements, saving resources and materials.
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