P45. Canson Vidalon Translucent Vellum Pad. 50 sheets per pad, 55lb paper.
This is the highest quality translucent/tracing paper. It can withstand most media without warping, ripping, cracking, or wrinkling. Resistant to scraping and can handle repeated erasures without distorting. Great for calligraphy with pointed and broad-edge nibs; clear enough to see guidelines underneath without backlighting. Neutral pH allows this tracing paper to be stored without yellowing or breaking down. Also suitable for microfilming offset and letterpress, pencil, technical pens, and markers.