Soap production is a massive industry that serves millions of consumers worldwide. In this video, we take a behind-the-scenes ...

The film details the process of soap making, starting with Carl Mason's laboratory demonstration using fat and sodium hydroxide (lye). It explains the chemical reaction known as saponification ...

Hot process. In hot process soap-making, external heat accelerates saponification. Most soaps can be used the next day, though it’s ideal to wait 1 week if you want a harder bar. Cold process.

The lye reacts with the triglycerides of the fat in a process called saponification. When the proportions of fat and lye are correct, this exothermic (giving off heat) reaction completely ...