Made the traditional way, on a cylinder mould, this paper has a harmonious natural grain. The fibres are evenly distributed, making the paper more stable, with very limited deformation. Made of long 100% cotton fibres, ARCHES???? Watercolour paper can absorb a lot of water without warping or causing the colours to bleed. Exclusive to Arches is it's sized to the core with natural gelatin, which means it can be scratched without tearing or linting. It also preserves the lustre and transparency of the colours whilst preventing paints penetrating into the thickness of the paper.