This top of the range fine white watercolour paper possesses a natural whiteness. It is mould made from 100% rag (cotton), has a neutral pH value making it acid free, has deckled edges (when in 560x760mm size) and is watermarked. Arches Watercolour Paper is available in NOT and Rough surfaces, and in a very heavy weight of 640gsm. 1/2 Imperial: 56x38cm | 22x15"