- Feb 13, 2016
- Reaction score
So I made my first couple of bars tonight, but noticed a slag buildup on the surface unless I continually stirred the pot. Not sure if that's the term used in soap making, but it's what we call impurities that surface when smelting metal. I am using an aluminum melting pot acting as a double boiler in a larger saucepan. Not that it's a big deal being my first batch, but curious of the cause. Is the m&p cooling too fast?