Clairefontaine developed Pastelmat to meet the specific expectations of the most demanding pastel artists. Acid-free and pH neutral, Pastelmat Sheets are affixed onto heavyweight 360 gsm stock. It is also an ideal surface for pencil and charcoal. Pastelmat's single and original surface is a true innovation that combines the advantages of two traditional papers. The fine particles are sufficiently well-fixed for a smooth surface and comfort of use, and the smoothness of the cork grain in the adhesive ensures longevity. The character "fixing" of this surface is so extraordinary that the positioning of multiple layers of pastels, and the realization of flat tints, precise details, or delicate and transparent veils are easily achieved. The use of fixative is not necessary with Pastelmat. The rigidity, weight, and non-acidity, as well as the paper's light-resistance, guarantee conservation of your artwork. However, it is recommended that a sheet of acid-free translucent paper be placed over finished artworks created on Pastelmat. Colors on Monitors - Due to differences in users’ monitors, the colors presented are an approximation of the true color.