What is the name of the same blank page before and after the book?

Butterfly page

When you open a book, the first blank page is called a butterfly page. The second page is called the title page. The cover page is printed with the title of the book, the name of the author, the name of the publishing house and the concise pattern. Because people's reading habits. The direction of the front cover is always the same as that of the cover. Open the cover, open the ring lining and blank pages; Words will do.

When we buy a book, we open it. The first blank page is called a butterfly page. The second page is called the title page. In the past, when binding books, the front and back sides were not allowed to stick together, and translucent or other special paper was often used as the title page. Improve the elegance of publications. The title page also refers to the page before or after the main content of a book.