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Coconut oil is an important base ingredient for the manufacturing of soap. Soap made with coconut oil tends to be hard, though it retains more water than soap made with other oils and thus increases manufacturer yields. It is more soluble in hard water and salt water than other soaps allowing it to lather more easily. [83]
Today there are two main types of Marseille soap. The original greenish-hued variety made with olive oil, and a white one made of palm and coconut oil mixture. [2] Originally sold only in 5 kg (11 lb) and 20 kg (44 lb) blocks, they usually come in 300 g (11 oz) and 600 g (21 oz) squares nowadays.
Sodium cocoate is a mixture of fatty acid salts of coconut oil that is used in some soaps. [1] Sodium cocoate is produced by hydrolysis of the ester linkages in coconut oil with sodium hydroxide, a strong base.
The Palmolive brand grew from one product, Palmolive bar soap. Made of coconut, palm and olive oils, Palmolive bar soap was introduced in 1898. Originally, the bar soap floated like Procter & Gamble's Ivory bar soap. By the turn of the 20th century, Palmolive bar soap was the world's best-selling soap.
[10] [11] Handmade soap can differ from industrially made soap in that an excess of fat or coconut oil beyond that needed to consume the alkali is used (in a cold-pour process, this excess fat is called "superfatting"), and the glycerol left in acts as a moisturizing agent. However, the glycerine also makes the soap softer.
It can be seen from the table that coconut oil is very saturated, which means it is good for making soap. On the other hand, linseed oil is highly unsaturated , which makes it a drying oil , well suited for making oil paints .