Is soap laundry soap? Is soap an alkaline substance?

Soap is a product that we have all used, and we usually use laundry soap when washing clothes, so many people can't tell the difference between soap and laundry soap. So let us find out: is soap laundry soap? How to choose laundry soap?

Is soap laundry soap?

Soap is a general term. Laundry soap is a type of soap. The commonly used yellow laundry soap is usually mixed with rosin. Today's laundry soap is further processed on the basis of the original soap according to the characteristics of clothing fabrics. It is more suitable for cleaning dirt on clothes and greatly reduces the damage to human skin. It is specially used to clean stains on clothes. Soap is made of natural raw materials such as fats and alkali. When the soap is discharged after use, it can be quickly decomposed by microorganisms. Laundry soap has a very strong stain removal ability, but if the water is hard, it will accumulate in the gaps between clothes, causing white or light-colored clothes to turn yellow or even fade.

How to choose laundry soap

1. Buy it in a regular store or shopping mall. Regular stores or shopping malls have relatively stable purchasing channels and have relatively strict purchasing control systems.

2. Look at the product label. Whether the label markings are standardized can sometimes reflect the quality of the product. Therefore, when purchasing, you should carefully check whether the outer packaging is marked with the production date or production batch number, shelf life or expiration date, manufacturer and address, implementation standard number, precautions, etc.

3. High-quality laundry soap should have appropriate hardness, not be sticky, not stratified, and should not sweat, emit oil, crack, or have severe frost; the soap shape should be beautiful and the shape should be correct; the soap body should have no defects or deformation, and the pattern and handwriting should be clear.

4. The color should be uniform, without black spots or dots, and should not be green or dark brown. The smell should be consistent with the inherent smell of laundry soap, without any unpleasant odors such as oily, sour, etc.

5. The soap body should not have any dirt, particles or mechanical impurities.

Is soap an alkaline substance?

No, soap is a weak alkaline. Soap is a widely accepted personal cleansing product with strong cleaning ability and low price. It has become a necessity in people's lives. Soap is an alkaline salt with a pH of 9.5-10 composed of fats, oils (mainly with added vegetable oils) and salt. It is the simplest anionic surfactant and removes dirt by forming soap salts to emulsify substances on the skin surface. Compared with soap, toilet soap has lower alkalinity, higher fat content, and is less irritating to the skin than soap. But for different groups of people, the choice of soap is also different. The molecular structure of soap can be divided into two parts. One end is the charged polar COO- (hydrophilic part), and the other end is a non-polar carbon chain (lipophilic part). Soap can destroy the surface tension of water. When soap molecules enter water, the polar hydrophilic parts will destroy the attraction between water molecules and reduce the surface tension of water, making the water molecules evenly distributed on the surface of clothes or skin to be washed.

Is soap made of fat?

Yes. There are two important ingredients in soap, one has sufficient affinity to water, and the other has sufficient affinity to oil. The substance with sufficient affinity to water can evenly distribute water molecules to the clothes or skin surface that need to be cleaned, while the substance with sufficient affinity to oil will penetrate deep into the oil stains and, through constant stirring, the oil stains will slowly form very small particles, detach from the clothes and skin surface, and finally be washed clean by water.