One of the early Ultimaker workshop participants, Paul Steenbrink (Cardillac) a Goldsmith,Â experiments with his Ultimaker to make jewelry, casted in gold or silver direct from the printed object. I didn’t know it is possible to cast directly from the printed model. The 3D print is invested in ceramic material and heated to +/- 1500 ÂºC and vaporizes, leaving a mould ready to cast from. I did some experiments myself with casting aluminum but I made a silicon mold and casted wax models which were casted in aluminum. It takes a lot more work and time than the method Paul uses.