[F6]
[F8]
[SM]
[F4]
The book is made with strong mermaid paper on the inner paper.
Rough paper
The paper material has reduced suction, and it is characterized by preventing unevenness of paint.
Spring
Inner paper: (medium thick) 8.1 oz (235 g) / 18 sheets
Paper: Coarse
(From Amazon.co.jp)