Strathmore ST236-82, 2-Ply Semi-Smooth 500 Series Sequential Art Bristol Paper Sheets, white, 11x17 in This 100% cotton bristol is an industry standard. It has been the choice among sequential art professionals and award winning illustrations for years. Plate surface has an ultra-smooth finish that is unsurpassed for detail work using traditional pen and Semi-smooth is slightly textured. It is suited for pen and ink tools&#44; pencil&#44; specialty pens&#44; and markers.