Perforated pages are easy to remove. Rigid chipboard backing provides a sturdy writing surface. Acid-free canary paper with legal ruling in blue ink on both sides of the sheet. 35 lines per page with 2 columns. Double-stitched top adds strength to the overall design. Acid-free paper won't yellow or fade over time. 15-lb paper resists bleed-through. 56 pt chipboard backing offers a sturdy writing surface. 50 sheets per pad provide you with 100 pages to write on.