How big is the four paper opening?
The size of 787 * 1092 mm flat base paper is the main size of our current cultural paper. Most of the existing paper making and printing machinery in our country are producing and applying the paper of this size. At present, countries in Southeast Asia use this size of paper, and other areas have rarely used it. 850 x 1168 mm in size is 787 x 1092 mm 25 on the basis of the need to adapt to the larger format of production, this paper size is mainly used for large format, this paper called 32 books is used. 880 * 1230 mm paper is larger than other sizes, so the utilization ratio of paper is higher, and the pattern is more beautiful and elegant. It is a standard in the world. Therefore, according to the choice of size of the base paper, it is big 16 open, positive 16 open and so on
The size of the page is called the book size. The folio is made of a full sheet of paper. Each sheet is cut and folded. Our custom named folio is named after a geometric series, a piece of paper folded size is off, and then fold to 4 open, and then fold 8 paper, and then fold to 16 fold in the open, 32 open, and then fold for 64, followed by analogy.
