Bienfang 528P-121 white drawing Bristol is an economical white drawing Bristol board with a smooth surface. Excellent drawing paper for pencil drawings and all wet media, airbrush, pen and ink, mechanical drawing instruments. Bienfang smooth-finish Bristol board is a 2-ply, acid free, recycled, 146 lb. weight paper. 20-sheet pad. 9" x 12" Bienfang white smooth Bristol board drawing paper.