DNL – 2nde : HOW TO MAKE SOAP ? I HISTORY OF SOAP The earliest recorded evidence of the production of soap-like materials dates back to around 2800 BC in ancient Babylon. A formula for soap consisting of water, alkali, and cassia oil was written on a Babylonian clay tablet around 2200 BC.
The word « sapo », Latin for soap, first appears in Pliny the Elder's Historia Naturalis, which discusses the manufacture of soap from tallow and ashes, but the only use he mentions for it is as a pomade for hair; he mentions rather disapprovingly that the men of the Gauls and Germans were more likely to use it than their female counterparts. Aretaeus of Cappadocia, writing in the first century AD, observes among Celts, which are men called Gauls, those alkaline substances that are made into balls, called soap. (Wikipédia) BC : Before Christ
The mixture is poured into a saturated salt solution. And this solution is then poured into the Büchner funnel. We use a vacuum filtration.
Vacuum filtration is a technique to separate a solid product from a solvent or liquid reaction mixture. The mixture of solid and liquid is poured through a filter paper in a Buchner funnel. The solid is trapped by the filter and the liquid is drawn through the funnel into the flask below, by a vacuum.