?Canson Edition is 100% cotton and complies with the ISO 9706 standard on permanence a guarantee of optimal conservation. It has the advantage of having a different texture on its two sides one smooth the other fine grain. A versatile product this art paper is ideal for drawing and traditional art printing techniques. Standard & Longevity guarantee Complies with ISO Standard 9706 acid-free and without optical brightness additives. Mould-resistant treatment.