What is a reproducible vellum?
A translucent paper that can be used to print erasible sepias/mylars which allows the builder/engineer to make modification and revisions and then reproduce them for your sub-contractors. If you plan to make modifications or revisions to the plans, most designers offer this set which comes with a Copyright Release Form. The Copyright Release Form gives you the permission needed to make your revisions / modifications and for copies to be made.