Many people know that pure water equipment is used to produce water in the production of chemical cosmetics, so why do we use pure water or deionized water in the production of cosmetics?
Water is the most widely used, cheapest and most abundant raw material in the production of chemicals. Water has good solubility and is also an important emollient substance. Most cosmetics such as shampoos, creams and lotions contain a lot of water. Water plays an important role in these cosmetics. The quality of cosmetics production water directly affects the cosmetics production process and the quality of the final product.
In order to meet the requirements of high stability and good usability of cosmetics, there are two requirements for cosmetic production water, including the concentration of inorganic ions and microbial contamination. Most cosmetics require deionized water to reach the level of general pure water, so that the salt content is reduced to less than 1.0mg/L, and the electrical conductivity is reduced to 1-10us/cm (20C, or resistivity 0.1-1M2cm). Another requirement of cosmetic water is to contain no or as few microorganisms as possible. Cosmetic hygiene standards: the total number of bacteria in general cosmetics should not exceed 1000/ml or more or less 1000/g, the total number of bacteria in cosmetics for the eyes, lips and oral mucosa and cosmetics for babies and children should not exceed 500/g, and the coliforms Pseudomonas aeruginosa and Staphylococcus aureus shall not be detected. Microorganisms can multiply in cosmetics, resulting in product corruption, unpleasant smell, product separation and agglomeration, which can also cause harm to consumers. Any water-containing cosmetics may grow bacteria, and the most common bacteria may come from the water itself. Therefore, modern cosmetics factories must use production water that is free of microbial contamination.