Yesterday I made a batch of CPHP (crock pot hot process) soap. The flashpoint of the fragrance I was going to scent the batch with was 200ºF. I pointed my laser thermometer at the soap as soon as it had finished cooking. It gave a reading of 160º. That didn't look right. I wondered how soap that hadn't had a chance to cool, already be below the fragrance flashpoint? I took out my old thermometer which has a probe, stuck it into the soap, and sure enough, it gave me a reading of over 200º!
Another soaping lesson learned. What has been your biggest lesson learned?