The premium rough rendering surface! Bristol is an artist quality, true two-ply pasted, drawing Bristol Board with a neutral pH for the best possible archival characteristics. Both sides of the sheet are identical and may be reversed for economy. Available in both a vellum and plate surface. The vellum (kid) surface is designed for dry wash, pencil, air brush, pastel, acrylics, brush and wash, lone and wash, or markers. The plate (smooth) surface is designed for pen, pencil, and markers. Both surfaces will handle erasure and reworking. Xerox compatible. 12 sheets per each tape-bound pad.