This traditionally handmade PI paper is made of mulberry tree* fibers for crafting and brush painting. Thin thickness, it is very tough and hard-wearing as lamp cover and other paper crafting material. it is absorbent but does not smear that much as a good brush painting paper. We would recommend this beautiful paper to sumi-e students and professional artists. *Mulberry tree leaves are the sole food source of the silkworms. Mulberry Paper #1 s fiber is finer than #2.