Is the book cover usually engraved on the front or the back?

Generally, the stamp (book cover) is square, rectangular or oval in shape, and the name of the book collector is engraved on the back. The specific text forms are: XXX seal, XXX seal, XXX book seal, XXX collection; As far as the seal cutting form of book seals is concerned, men mostly use male engraving (that is, the printed text is convex), while women mostly use printing (that is, the printed text is concave); As far as seal cutting fonts are concerned, most of them are small seal cutting, full and square, simple and honest; There are many side sections engraved on the side of the book chapter, including poems and dialogues. , expressed the master's mind.