3. cold process – this is the process of adding fats and/or oils to lye and allowing saponification to occur. This needs to sit an cure for days or months and the outcome is somewhat of a mystery. Hard core soapers are cool people. This is the dangerous one, in case you were wondering. Cold process is sometimes shortened to CP so I thought it meant “chemical process” for a long time.
3b. hot process – (as far as I know) is like cold process but the saponification is done in a heated pot which allows the glycerin created in the process to separate out – which is glycerin soap base (I think).