The Expression Watercolour is a natural white, 100% cotton 300 gsm paper for all wet painting techniques and etching, and features internal and surface sizing. Colours stand out excellently on the paper and impress with their natural brilliance, thus giving every subject its very own unique presence. Masking fluids or masking tape can be used and removed residue-free. While wet colours can be easily corrected or taken off. Expression Watercolour is acid and lignin free, light-resistant and features extreme longevity. The cold pressed surface is eraser-resistant due to the surface sizing.