Soft soap

Soft soaps, also called Green soap, are pasty and liquid soaps, which are made of mostly inferior fats with potassium hydroxide solution. They are therefore potassium salts of fatty acids to about C - 14th In contrast, the sodium salts of the higher fatty acids are determined and are referred to as core soaps. In the preparation of the Rohseifen glycerol, and alkali salts. For cleaning the Rohseifen of the aqueous phase are separated. The Rohseifen be mixed with hot water and it forms a homogeneous liquid. While the core soaps can be precipitated by the addition of sodium chloride, these salting-out is not displayed if the soft soaps. For the use of the solution of the soft soaps are often added yet additives such as cellulose ethers, potassium carbonate and flavorings.

Both soap varieties are surface active anionic surfactants and reduce the surface and interfacial tension in an aqueous solution. The washing effect is due to the fact that the surfaces of the wet -to-clean substances, and dirt and oily substances can be emulsified and dispersed in the wash solution.