This Khadi Hardback sketchbook contains 40 pages with section stitched binding & one deckle edge. Cover paper is Bhutanese tsasho. Pages are artists’ handmade paper from Khadi Papers India. The paper is 100% long fibred cotton rag. Internally sized with neutral p H size. Tub sized (surface sized) with gelatine. Acid free. Smooth surface. For watercolour & all painting & drawing media.