What is a picture book hinge?

A picture book is divided into four pages, with two pages on the front and back of the paper, and the book is folded and printed on both sides.

1. When printing, you can treat the whole book as a booklet or divide it into several booklets, and the number of pages of each book can be specified. The number of pages in each volume must be an integer multiple of 4.

2. Picture book folding is mostly used for children's enlightenment education. Through the changes of different one-sided picture books, children's practical ability and creative ability can be improved.