We place the oil in tanks, and a specific amount is taken from it depending on the quantity of the mixture. Then the sodium hydroxide substance is dissolved in the water at a certain temperature. By using pumps, the oil is pumped over the sodium hydroxide substance and it is stirred and mixed with special machines. The heating process is carried out using steam, then the water is drained and the process is repeated several times until the oil is mixed really well with sodium hydroxide substance, only when it begins to saponify, the smell of the oil is changed into the smell of soap.
