16 opening paper is the paper originally used for documents in the government and institutions, and can also be used as printing paper. The size is magnanimous: 210mm× 285mm; Correctness: 185mm×260mm.

brief introduction

When designing a general book, it is related to the size of a large piece of paper: 31x 43 (78.74 cm x109.22 cm). This piece of paper is folded in half to become two (four pages) at a time, which is called folio.

When folded in half again, it is folded into four parts (eight pages), which is called quarto; When it is folded in half again, it becomes eight (16 pages), which is called 20% discount. If you fold it in half again, it will become sixteen (32 pages), which is called sixteen fold, and so on. This is the historical origin of the size of the book, and it is still called this.