2. Newsprint: also known as white newspaper, the packaging form is also divided into reel and flat edition. The basis weight of newsprint is about 5 1g, which is mainly used for printing newspapers and periodicals.
3. Offset paper: referred to as offset paper for short, the quantitative is 60- 180g, which is divided into double-sided offset paper and single-sided offset paper. Among them, 70- 120g double-sided paper is the most widely used. There are three kinds of double-sided and single-sided offset paper: special number, 1 and No.2, and special number and 1 double-sided paper are used to print advanced color offset printing products; No.2 double-sided adhesive plate paper is used for printing general color printed matter; Single-sided offset paper is mainly used for printing and posting posters and New Year pictures.
4. coated paper: coated paper is made by coating a layer of coating liquid on the base paper and super calendering. The basis weight is 90-250g, which can be divided into double coated paper and single coated paper. There are three product numbers: special number, No.1 and No.2.
5. Book cover paper: the quantitative is 80- 120g, which is mainly used for book covers. Book cover paper has a variety of colors to meet the needs of printing different covers.
6. Bible paper: divided into 1 and No.2, with a quantitative of 25-50g, mainly used for printing dictionaries and manuals. Bible paper is highly hygroscopic, and it will wrinkle when it is slightly wet.
7. copy paper: copy is a transliteration of English copy, which means copying. Copy paper is mainly used for printing multiple sheets, suitable for copying and typing. Because copy paper is translucent, it is mainly used to bind and protect pages with vertical pages in book printing.
8. Cardboard: Paper with a basis weight exceeding 250g/m2 is called cardboard or cardboard. There are many kinds of cardboard. Paperboard for book printing is mainly used to make cover pressboard for hardcover books and envelope pressboard for hardcover books and picture books. Cardboard is flat paper.
Types and uses of paper
When choosing paper varieties, it is mainly based on the characteristics of printed matter to be printed and the type of printing machine used.
1. Color covers, illustrations or advertising inserts in printed books and periodicals can be made of double-sided coated paper or double-sided adhesive paper.
2. One-sided printing materials such as printed trademarks can be coated paper or single-sided adhesive paper.
3, printing dictionaries, dictionaries, manuals and other reference books should choose Bible paper or thin embossed paper.
4. To print general books, you can choose offset printing paper or relief printing paper.
5. It is the same as printing ordinary books. If you want to use it on a rotary press, you need to use a web (except for a flat rotary press). If you plan to print on a common platform, you need to use flat paper; If you print on an offset press, you should choose offset paper; if you print on a relief press, you should choose relief paper.