Langton is a superior quality watercolor paper made from 100% high quality cotton. For many years artists have appreciated the qualities of the Langton. Made traditionally on a cylinder mold machine, the paper features a natural whiteness with a soft touch and distinctive texture. Langton watercolor paper is acid free with an alkali reserve to preserve finished pieces of work and protect against discoloration. Treated with an anti-fungal treatment, Langton watercolor paper also boasts a gelatinized surface for strength and resilience.