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 full imperial sheets) and is watermarked.We sell Arches Watercolour Paper in NOT and Rough surfaces, as well as in a very heavy weight of 640gsm.1/2 Imperial: 56x38cm | 22x15"