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