Clairefontaine Pastelmat pad 4 shades: Buttercup, Maize, Dark Grey, Light Grey, 360gsm (170lb) 12 sheets 30cm x 40cm The Pastelmat is a new concept for the pastel market! You don't need to use fixative between each layer; you are able to multiply the layers without a saturation effect. It is more comfortable to blend, thanks to the smoothness of the surface. The Pastelmat is an acid free cardboard on which thin fibbers of cellulose are fixed. It is resistant to water and it keeps its original properties after being rubbed. Each sheet is protected by crystal paper.