Product packaging can be divided into roll paper and plain paper, and the weight of embossed paper ranges from 50g to 80g per square meter. The products are divided into three types: special number, 1 and No.2, special size and 1, which are used for printing advanced books, among which No.2 embossed paper is mainly used for printing general books, teaching materials and periodicals.
2. Newsprint: also known as white newspaper
Packaging forms can also be divided into drum and flat version. The basis weight of newsprint is about 5 1g, which is mainly used for printing newspapers and periodicals.
3. Offset printing paper: offset paper for short.
The basis weight is 60- 180g, and there are double-sided offset paper and single-sided offset paper, of which 70- 120g double-sided offset paper is the most widely used. There are three kinds of paper for double-sided and single-sided offset press: extra large, 1 and No.2, extra large and 1 double-sided offset press paper is used to print advanced color offset press products; No.2 double-sided printing paper is used to print general color printed matter; Single-sided offset printing paper is mainly used for printing posters and New Year pictures.
4. Coated paper
Coated paper is made by coating a layer of coating liquid on the base paper and then super-calendering. The quantitative is 90-250g, which is divided into double-sided copper plate and single-sided copper plate. There are three products: special size, 1 and 2.
Coated paper with special specifications can be used for printing 150g and above thin line products; 1 coated paper can be used to print 120- 150g thin-line products; No.2 coated paper can be used for printing thin line products below120g, in which coated paper cannot be folded, and once it has creases, it is difficult to recover.
5. Book cover paper
The basis weight is 80- 120g, which is mainly used for book covers. Paper has a variety of colors to meet the needs of printing different covers.
6. Bible paper
Divided into 1 and No.2, the quantity is 25-50g. It is mainly used for printing dictionaries and manuals. Bible paper is highly hygroscopic, and it will wrinkle when it is slightly wet.
7. Copying paper
Copy is a transliteration of English copy, which means plagiarism. Copy paper is mainly used for printing multiple sheets of paper, suitable for copying and typing. Because copy paper is translucent, it is mainly used for binding vertical pages in book printing.
8. unreal
Paper with a basis weight of 250g/m2 or more is called paperboard or cardboard. There are many kinds of cardboard. Cardboard for printing books and periodicals is mainly used to make the cover of hardcover books, embossed cardboard and envelopes of hardcover books and picture books.
Paperboard is flat paper, and the thickness of pressed paperboard is generally divided into 1(mm), 1.5(mm) and 2(mm), and the thickness of jacketed paperboard is 1(mm), 1.2(mm) and1.