Here's How - Season 2 Episode 8 Soap

After Orange Balloon, Mouse and a girl discuss sweet-smelling soaps, the narrator talks about the development of soap, noting that serious bathing didn't start until around the 20th century and that nobody really knows who invented soap. Some people make their own soap, but most of it comes from factories. We're taken inside a factory, which we learn that while it isn't quite as much of a hot and steamy place as it was in the old days, it's still quite hot, which a kettle room containing large kettles that go 14 meters deep into the floor. These kettles boil the soap ingredients tallow, palm, coconut oil, soda (which helps aid the mixing) which are all together in what looks kind of like porridge. This mixture is tested many times for its thickness until finally, soap flakes are produced, which are kept in a warm and dry bin until needed. The perfume is finally added to the soap, which mixed more and more with a device called a double boiler, the idea being to completely remove any rem