What is the making method and formula of ancient soap?

The production method and formula of ancient soap are pots of lard, caustic soda, salt, water and cooking materials. Add water and caustic soda to the pot. When the alkali is completely dissolved, add grease, continue heating and keep stirring.

After the materials in the pot are boiled, continue to heat with low fire and stir constantly to fully saponify the oil. This process takes a long time, even a whole day. Sodium fatty acid produced in the process is the main component of soap.

Changes in soap

Soap is a general term, and laundry soap is a kind of soap. Commonly used yellow laundry soap is usually mixed with rosin. The present laundry soap is further processed on the basis of the original soap according to the characteristics of clothes and fabrics, which is more suitable for cleaning the dirt on clothes and greatly reduces the harm to human skin.

It is specially used to clean stains on clothes. In addition, soap is made of natural raw materials such as oil and alkali. Soap is discharged after use and can be quickly decomposed by microorganisms. Laundry soap has a very strong decontamination ability, but if the water quality is hard, it will accumulate in the gaps of clothes, making white or light-colored clothes yellow or even fade.

Look at the label. Whether the label is standardized can sometimes reflect the quality of the goods. Therefore, when purchasing, carefully check whether there is a production date or batch number, shelf life or limited use date, manufacturer and address, implementation standard number, precautions, etc. It's all marked on the outer packaging.