Loose leaf sketch book: use acid free sketch paper. The case is thick, the paper texture is relatively strong, and the double-sided texture is good. The roughness of the paper is medium, not the kind with particularly large texture. This book can be used on both sides, unlike some books, which are smooth on one side and rough on the other. It is more suitable for sketch, charcoal pen and pencil painting. The metal ring pull ring can be spread 180 degrees, which is very convenient to use.

Small fresh blank sketch book: it is made by circular screen technology and designed for artists and professional lovers. It is suitable for daily practice and works in art colleges, as well as design and drawing of clothing, home decoration, etc. Acid free, bleach free watercolor paper, double-sided texture, medium coarse and rough texture, natural white, good stiffness, natural texture, good expressiveness, strong paper, moderate texture, scratch resistance and not easy to hair.