Leading paper brand Arches has 100% cotton content which gives the paper its strength, beauty and a nice natural lasting whiteness with inimitable touch. Arches is the only paper mill in the world to gelatin size its watercolour paper "to the core". 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. It allows paints to be removed, either wet or dry, easily revealing the whiteness of the paper. Arches Watercolour paper can absorb a large amount of water with limited deformation. Arches Pads are available in 2 different surfaces, Not and Hot Pressed. Ideal for watercolour painting, as for all wet techniques such as ink, gouache and acrylic.