paper apart is the sizing, which allows artists to lift paint and to scrub at the paper without deterioration to the surface. It is possible to layer paints, returning to the same image and re-wetting the surface. The ability to make corrections while the paint is wet or after it has dried makes Héritage a very forgiving paper to paint on. This sizing also gives great image clarity, as it does not allow marks to bleed. Sharp edges are retained after the paint has dried.Canson Héritage is made from 100% cotton fibre and thus is naturally acid-free. It has been treated to make it mould-resistant and does not contain optical brighteners. It complies with ISO Standard 9706 and is a naturally-durable paper.