Soap is our commonly used daily necessities. Soap can clean the oil on our hands or on our body. In addition, what do you know about the “secret” about soap?
First of all, soap is a soap suitable for skin cleaning. Most of them use sodium fatty acid and other surfactants as the main raw materials, and made by adding quality improvements, appearance improvements and spices.
Secondly, with the development of soap production technology, it gives them other functions by adding functional additives based on the basic washing function, called multifunctional soap. At present, soap on the market can be roughly divided into the following seven categories:
The spices and white soap are grinded into various shapes, which is the most economical, which can be used for general cleaning and removing fat.
The solid soap that is made of low alkali is required for multiple grinds, which is often used as a cleansing.
It is a soap that is not ground. It is easier to float on the water and the cleaning effect is not bad, but it is difficult to maintain humidity.
When grinding, add high -concentration oil to the surface of the skin when cleaning, which will form a layer of oil layer on the skin surface, which is often used for babies.
It contains more than 10%glycerin and some vegetable oils, which are similar to oily soap.
Special morphological soap
Emulsive emulsifiers or creams are mainly used to remove the finished products designed by special cosmetics.
Essential oil soap
A kind of soap that is very popular in recent years has been made of plant essential oils.
Soap has a bacteriostatic effect. After research, only ordinary soap is cleaned with both hands, and the cleaning purpose of daily needs can be achieved. At the same time, the cleaning ability of flowing water can also remove most of the bacteria. However, if you use soaps specifically used for sterilization for a long time, while eliminating bacteria, it will also kill the normal flora that protects the skin in the human body, and the use of sterilization soap will also cause the skin to produce a lot of resistance bacteria to resistance bacteria. Conditioning to traditional sterilization may cause infection.
This article is scientifically controlled by Han Sujuan, a senior teacher in the ninth middle school of Shijiazhuang City, Shijiazhuang City.
This work is originally created by “Popular Science China-Science Principles”. Please indicate the source when reprinting.