Stillman & Birn Alpha Softcover Sketchbook, Heavyweight 100lb, White, 48 Sheets - 3.5X5.5 Contains 48 sheets of heavy-weight 100lb archival paper The paper is white and has a medium grain surface Noticeable tooth is suitable for use with all dry media and light washes ph neutral as well as lignin and chlorine free Flexible yet rugged soft-bound cover with sewn bindings