Bienfang 527K-121 white drawing Bristol is an economical white drawing Bristol board with a vellum surface. Excellent drawing paper for pencil drawings and all dry media. Bienfang vellum-finish Bristol board is a 2-ply, acid free, recycled, 146 lb. weight paper. 20-sheet pad. 9" x 12" Bienfang white vellum Bristol board drawing paper.