Clearprint 1020 Drafting & Design vellum paper is a heavier weight version of the legendary 1000H vellum. Added weight and feel are desirable in some cases where additional weight is required. Smooth, translucent surface suitable for pencil or ink. No skipping, spreading, or feathering. Archival quality with Clearprint's legendary strength, erasability (no ghosting), and re-draw characteristics. 20 lbs. (80gms/meter2). 100% new cotton fiber vellum paper is excellent product for manual drafting. Transparentized without solvents to produce the proper translucency. Archival quality; high tensile strength helps prevent tears. Drawing vellum is used by engineers, architects, draftsmen, graphic artists, to make drawings and sketches to scale in either fractional or decimal dimensions, drawing diagrams, plotting mathematical functions, experimental data, etc. Available in rolls and sheets. Plain, unprinted or 8x8 grids. Clearprint 20# drafting vellum paper is made in the USA.