Thank you for the endorsement, Bob. I didn't realize there was any remaining challenge to the distinction between "cast" and "mold." I did a google scholar search for "casts, molds, and steinkerns" and came up with 591 hits. A brief review of the first few pages will provide an answer to your challenge. http://scholar.google.com/scholar?hl=en&q=casts%2C+molds%2C+steinkerns&btnG=&as_sdt=1%2C10&as_sdtp=