Album printing is a type of book and magazine printing that mainly displays images and a small amount of text. Albums are basically printed on copperplate paper, and there are also albums that use special cover paper and inner copperplate paper, as well as brochures that are printed entirely on special paper.

The usual size of a picture book is 16 pages, which is 210 × 285mm. The reason is that this size saves paper. A large sheet of paper is 889 × 1194mm, and one large sheet of paper can print exactly 16 pages, so it is called a large sheet of 16 pages.

The size of general books is slightly different. Books are printed on regular paper with a regular size of 787 × 1092mm, and the size is 185 × 260mm when calculated at 16 degrees. Therefore, the vast majority of novel and prose books we see in the library are of this size.