What is soft water?
In simple terms, it is water with a low concentration of soluble metal salts. The mineral salts mainly refer to calcium and magnesium salts. When metal containers are used to boil water, the white or pale yellow crystals that form on the inner surface of the container are the mineral salts in the water that have precipitated due to heat.
Since there is soft water, there is also hard water. The dividing line between the two is the concentration of mineral salts. Soft water has a hardness of less than 8, moderately hard water is between 8 and 17 degrees, and hard water is greater than 18 degrees (the hardness of water is 1 per 1 liter of water containing 10 milligrams of calcium oxide).
The beauty effects of soft water can be traced back to the reaction between soap base and metal salts in water. As we all know, soap is the simplest product made by mixing oil and strong alkali. Chemically speaking, a substance is considered alkaline if its molecular structure contains hydroxide ions. Of course, soap is a strong alkaline substance, especially when it dissolves in water, there will be a large number of free hydroxide ions. At this time, the soluble metal salts in the water will react with the hydroxide ions to produce slightly soluble calcium hydroxide and insoluble magnesium hydroxide - commonly known as "soap scum".
Because "soap scum" has strong adhesion, it will stick to the surface of the skin. On the one hand, it will block pores, causing skin acne, closed pores, and roughness problems; on the other hand, it will prevent the skin from absorbing external skincare products effectively, leading to insufficient skin nutrition and wasting time and money.
Soft water has the effects of inhibiting fungi and increasing skin oxygen content, so persistently using soft water to wash face can not only eliminate the inflammation of acne, but also increase skin elasticity and oxygen content, and solve the problem of dry dander.
