Stillman & Birn Gamma Hardbound Sketchbook, Heavyweight 100lb, Ivory White, 62 Sheets, 5.5X8.5 Contain 62 sheets of heavy-weight 100lb archival paper The paper is ivory white in shade and has a vellum surface Toothy vellum surface with superb erasure for dry media ph neutral as well as lignin and chlorine free covers made of extra heavy weight binders board