This 16 lb. (meter2/68gms) media is 100% new cotton, and transparentized via a patented method of manufacturing which leaves it free of residual solvents. This process, which involves use of a solvent free transparentizing medium, makes it perfect for archival needs. It provides excellent strength and "ghosting-free" erasability so you can sketch, erase and redraw with no issues. Excellent for architectural drawings, drafting, and art projects. The weight makes it possible to use without a white backing, but retains a transparency level sufficient for tracing. Also great for use as an acid-free cover sheet to protect prints in a portfolio. This new process also provides the incredible Clearprint quality, making it a great media for many uses. Options include both unprinted, and printed blue grid (fade-out) styles.