Cotman Water Colour Paper is an inexpensive mould-made paper made exclusively to Winsor & Newton's exacting specifications. It is made from fine quality, mould-made, wood-free paper to ensure maximum stability and is acid-free for extensive life without deterioration. Cotman has a natural warm whiteness and is both internally and externally sized. The sizing ensures even absorption, gives brilliance for color and facilitates erasing, sponging and removal of art masking fluid without damaging the surface. This glued blocks of 20 sheets of paper can be stretched to avoid buckling when wet and dries quickly. Cold Pressed paper has a moderate texture to hold in water and pigment, and is generally considered the easiest to use.