The repair requirements of ordinary ancient books are relatively simple. Generally, it is only necessary to repair the damaged parts and bind them into a book for easy reading. However, the requirements for the restoration of rare ancient books are much higher. Rare books are mostly books with earlier age, edition value and cultural relics value. In order to properly maintain the original features of rare books and rare books in different times and preserve their artistic characteristics in engraving and binding, the restoration work should be carried out in accordance with the original styles of these ancient books as far as possible. Therefore, the basic principle of the restoration of rare ancient books is to "preserve the old as before".
"Old-fashioned" is very detailed and complicated in repair and binding technology. It not only requires the restorer of ancient books to master exquisite repair technology, but also needs to have a certain version knowledge and understand the paper and binding characteristics of ancient books in China, so as to be aware of it in the restoration.
Before carrying out the work, we should first formulate an appropriate restoration plan according to the specific situation of damaged ancient books and the principle of "taking the old as new", and then prepare tools and materials according to the plan before carrying out the restoration work.