210 gsm or 100 lb paper, Rough Texture 32 page Sketch Book, 5"x6.5" Deckled edges Tub sized (surface sized) with gelatin ACID FREE All Hardback sketch books are made with Khadi Rag paper pages. Section Stitched Binding. Khadi Rag Papers - Artist Paper made from 100% long fibered cotton rag, resulting in exceptional strength and durability. They are tub sized (surface sized) with Gelatine. For watercolor and all painting and drawign media. For oil paint prime with gesso or acrylic primer. Acid free.