Introduce two types of bindings:
1. Ring binding: Ring binding is a popular binding method at present, that is, punching holes at the end of the paper, and then giving a suitable collar according to the thickness of the book block and installing it. There are no specific restrictions on page numbers, and there are no concepts of "pasting" and "folding hands". Imposition is relatively free, as long as the front and back of the paper correspond. Generally speaking, for 250g and 300g thick coated paper, it is more appropriate to use ring packaging and thread-locking binding when there are many pages.
2. Wireless binding: Wireless binding is a common binding method at present, which is divided into hot binding, cold binding and PUR binding. At present, the most commonly used technology in China is the hot sol loading process. Because the glue filled with hot sol is soaked and dried, the book cannot be opened to the end, and the mouth of the book is about 3MM, so it cannot be read. So the center of the inner page should be 2-3MM away from the opening. Do not use paper weighing more than157g for hot-melt books, because the paper is too thick, which may cause the spine glue to degum and break.