Cotman WC Pads Spiral Winsor & Newton Cotman Water Colour paper is a fine quality mould-made, wood-free paper made exclusively to the exacting specifications of Winsor & Newton. Both inexpensive and versatile, it is ideal for use by students, amateurs or professionals who use large quantities of paper. Cotman paper is acid free for extensive life without deterioration and is both internally and externally sized to give brilliance of colour and to facilitate erasing and sponging without damaging the surface