Cotman Water Colour Paper is an inexpensive 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 sized ensuring even absorption, which gives brilliance of colour and facilities erasing, sponging and removal of art masking fluid without damaging the surface.- 12 sheets of 300g/m (140lb) acid free watercolour paper Not surface