Arches watercolor paper is a 100% cotton paper. Arches Watercolor Paper is a professional grade watercolor paper of the highest quality. Manufactured in the same French mill since 1492, Arches watercolor papers are produced on a cylinder mould with pure French stream water. Made with natural gelatin sizing; naturally white containing no optical brightners offers optimal longevity. Each sheet of Arches watercolor paper is hand inspected to ensure consistency and durability. Arches is strong enough to handle multiple washes of color, masking fluid, scrubbing and artist tape without damage to the surface. Each sheet is permeated with sizing to give each fiber a consistent feel and absorbency. It is an ideal paper for watercolor and other wet media, and can also be used for drawing and printmaking.