Acid free, Lightfast and extremely resistant to ageing. The French word “torchon” characterizes a very coarse linen structure. So is the surface of this board. The Pads are glued and gauzed to ensure flatness when wet. Torchon is ideal for all wet painting techniques: watercolour – especially for effects with hard-edged colours and smooth washes – and also gouache, tempera and acrylic.