A block of 20 sheets of the highest quality watercolour paper from Arches. Made the traditional way, on a cylinder mould, Arches watercolour paper has a harmonious natural grain. Thanks to this method, the fibres are evenly distributed, the paper slackens uniformly when wet. Its composition with long fibres of 100% cotton gives the paper its strength, beauty, a natural, lasting whiteness and an inimitable touch. Gelatin sized. This preserves the lustre and transparency of the colours whilst preventing paints from penetrating the paper. It allows superposing of washes and gives it added strength to resist erasing and scratching without tearing or linting. It also allows paints to be removed, either wet or dry, easily revealing the whiteness of the paper. Can absorb a large amount of water with limited deformation. Available in Cold Pressed, Hot Pressed or Rough surface. 23 cm x 31 cm (9 x 12").