The industry standard stereolithography resin for QuickCast investment casting patterns has, for the last several years, been the DSM 11120 Watershed resin. DSM has now developed and released a new resin, the 19120 ProtoCast AF resin, the industries first completely antimony free stereolithography resin and the first developed specifically for investment casting applications. The new resin is designed to provide significantly less ash than previous resins and eliminate the risk of antimony contamination.

This paper reports the results of laboratory and foundry testing of both resins in areas critical to investment casting performance. In addition, the results of testing to identify critical burnout process parameters are reported.