Found this diary entry on Anne L. Watson's website and it reminded me of this discussion so I thought I would post it because soapers never seem to tire of receiving more information.
"December 6, 2011 A CPOP Disaster
A reader writes:
"I prepared a ~ 250g batch that I make frequently of 100% coconut oil soap and after 1 minute immersion blending poured it into three silicone mini loaf pans as usual. These were then placed covered into the preheated 170 oven. Within 5 minutes the exotherm went wild, the still liquid raw soap violently boiled out of the molds, and I had one Hell of a mess! Never mind that I was also dealing with a nasty alkali!
"Since I was trained as an experimenter, I couldn't stop after one disaster. The next step was to rethink the obvious and NEVER HEAT COLD PROCESS RAW SOAP at the beginning of the exotherm. So, for the second trial, I aged another batch of the same recipe at room temperature in the molds for 24 hours as usual until the exotherm settled down. THEN I oven-aged the bars at 170F with no problem for your prescribed 2 hours.
"I wanted to share this with you because there are very large safety concerns - I don't want to see someone injured from trying to bake raw soap and having it boil all over the place."
The main difference between this and the way I do CPOP is that I use a large wood log mold instead of silicone mini loaf pans. I've never had a problem. Would be interested in other readers' experiences along this line."