Canson marker drawing paper is acid-free, 18 lb. white paper. Smooth, semi-transparent artist's paper pads and sketch books designed to accept heavy coverage of alcohol and solvent markers without bleeding. Also suitable for pencil, pen and ink. Developed for designers and graphic artists to create layouts, rough comps, sketches, and renderings. Canson Illustration wire-bound sketch pads have heavy-duty 115# specialty papers.