Had to post latest casting and technique based on Metalcaster's process.
14k yellow gold head groups cast with no new metal (did use deox additive). These were done in my small oven with the air mod turned off, so no extra air flow in the oven (do have holes drilled near floor on both sides. 1 hr 300f, 1.5 hr 650F, 3 hr 1400f. down to 900f for casting. Satin cast 20.
These three prints 1:1 mix on 1.2 machine, 30 xy 30 Z.
NO UV cure used, Washed in soapy water in ultrasonic for 15 min. Dried in oven 15 min at 150F (make sure no water on print). Used baby oil (high grade mineral with fragrance, smells like baby powder when hot, not for ingestion, external use only) that i had for quenching certain gold parts.
Oil in pyrex measuring cup, 3 min on high, 10 min cool, 3 min on high, 10 min cool, 3 min on high. Remove with tweezers and placed on paper towel to drain 5 min. PLaced in oven at 150f for 15 min. (all oil gone assume it was absorbed).
Built tree, invested, placed in oven after 1 hr bench set. As good a casting as i have ever had.
Thanks so much Daniel and others that started this experiment. Next batch white gold.
I did check temp with metal thermometer after last 3 min heating. Max temp I measured was 275F.
Really do think since Mike's mention of oxygen inhibiting curing, that the heat does the trick because no O2 is in contact with the resin prints while submerged in oil. Please be careful if u try this as my pyrex measuring cup got really hot, had to handle with few layers of paper towel (suggest oven mitt or similar). I would def not over heat the oil. I have seen flash over boiling of other liquids when tongs or other objects introduced into super heated liquids. This will hurt u if you get a boil over on any part of your body. Remember water boils at 212F and mine got up to 275F.
Those small bumps are just where i cut off supports before curing. I did not pre finish these prints in any way. These are as close to flawless as I have ever seen, anytime, resin or wax. I am thrilled. Only time will tell, but very positive results so far. Thanks again Daniel.
Dance like nobody's watching!