Casting gold on to a platinum ring is a popular way to create bimetal jewelry. It is however a time consuming process ranging at best from 8-14 hrs for the platinum casting, then, after finishing the ring and attaching the wax for a bi-metal casting, another 5-8 hrs of burn-out are needed to cast the gold portion. Add finishing times to that and it is clear that there must be room for improvement.

Using a video demonstration, this paper is going to show such a casting in detail, employing a high speed, high temperature, space age investment powder, that makes it possible to cast either part, be it the platinum portion or the gold portion in about two hours or less.

Authors: Jurgen J. Maerz, Ricardo Basta/Eichberg