Stonehenge Aqua watercolour paper evolved after years of collaboration with paper mills and artists to create a high-performing paper for watercolourists that will exceed their expectations. This 100% cotton paper is available in 300gsm, 550gsm and 600gsm weights in standard 56x76cm (22x30") sheets and a selection of blocks (glued 2 sides) in both cold-press and hot-press finishes. It is acid and chlorine free and features the same surface on both sides of this buckle-resistant, professional "crisp" feel paper.