Sketchpad. Extra smooth drawing paper Bristol is made of 100% cellulose paper. Weight of 205g is ideal for technical drawing and pen-and-ink. Highly resistant paper: withstands repeated scratching and erasing without fluffing. Acid-free, pH-neutral. Extra smooth white paper. 100% cellulose. Glued on the short side. A4. 20 sheets. 205 g/m2.