Facial cleanser is usually composed of the water phase, oil phase, and some free surfactants and nutrients. According to the principle of similar compatibility, the oil phase in the facial cleanser can dissolve the oil-soluble dirt on the face, and the water phase can dissolve the water-soluble dirt on the face. Part of the free…
Cream skin care products are solid or semi-solid emulsions, with two main types: oil-in-water type and water-in-oil type. Generally speaking, oil-in-water creams are easy to spread and have low viscosity. Water-in-oil creams have high oil content, heavy oily feel, and high viscosity, and are generally used to prepare products such as night creams and massage…
The intermediate experimental stage is to further study the changing rules of the process technology in a specific scale device. It will involve problems that cannot be found and solved in the small test stage. The optimal process conditions for each step in the process technology may change with external conditions such as experimental scale…