This sketch paper has been toned specifically for use with light and dark media. The pads contain 80 lb. (118 gsm) medium-surface sketch paper appropriate for graphite, chalk, charcoal, sketching stick, marker, china marker, colored pencil, pen and white gel pen. The paper is 100% recycled and acid-free with kraft and bark fiber inclusions for visual interest. Each pad contains 24 sheets with the exception of the 5.5" x 8.5" and the 9" x 12" which contain 50 sheets per pad.