Even though this product is vellum, it’s made of 100 percent cotton fiber, so it is strong and will hold up well as you work on it, even when you need to erase. And, your erasure will leave behind no ghost imprint, allowing you to re-draw without complications. Because of its 100 percent cotton composition, and because the process that made the paper transparent was done without chemicals, the paper has the legendary Clearprint archival quality, so your work will last. The paper handles both pencil and ink well. It comes either in unprinted blank or printed with blue grids that fade-out when they are scanned or copied. It’s available in the 16 lb. weight in 18 x 24 sheets with 8 x 8 grids. There are 50 sheets in each package.