Canson C523-88 12 in. x 16 in. 300g Arches Watercolor Paper with Hot Press - Natural White Professional grade watercolor of the highest quality. 100% cotton&#44; cylinder mould made with natural gelatin sizing. Flawless textured surfaces of cold press&#44; hot press&#44; and rough with deckle edges&#44; acid free Contains an antimicrobial agent to help resist mildew. 300g Arches Watercolor Paper Hot Press - Natural White.