Watson watercolor paper resists water damage and has a versatile thickness and paper quality. Natural colors have an elegant finish suitable for mild spring and autumn tones. It is excellent with watercolors and works well with charcoals and pastels. It also retains water well, allowing for blurring, blurring, back-running, and rifting. In the case of pastels, the elasticity of cotton allows you to paint to a finish similar to oil painting. Size Catalog Number SM NW-1501 F3 NW-1503 F4 NW-1504 F6 NW-1506 F8 NW-1508 F10 NW-1510 【 SPEC 】 Surface : Type Paper - Book Paper : Material High percentage Cotton Surface : Colour Natural Surface : gsm 239 gsm Paper : Format Spiral Book Quantity : Sheets 15 Sheets To use with Watercolour , Pastel , Pencil Other Acid free