The mystery of cosmetics

The hygroscopic cosmetics should be replenished in time to clean the skin. Keep the stratum corneum moisturized, increase the softness of the skin and make the skin moisturized.

First, the natural wetting factor.

Containing 1020% moisture, the delicate skin should be in the cuticle of soft, moisturized, shiny bodybuilding skin. To maintain the elasticity and softness of the skin. If the moisture content in the stratum corneum falls below 10%, the skin will appear dry and rough, losing luster and elasticity. In severe cases, it will cause the skin to split. By applying makeup, it can prevent evaporation of water and even help to replenish moisture. Therefore, skin moisturizing is one of the important functions for cosmetics. The sebum on the skin's appearance prevents the water from evaporating and thus adheres to the moisture contained in the stratum corneum of the skin. At the same time, due to the existence of a hydrophilic hygroscopic substance called natural wetting factor in the corner layer, it is abbreviated as NMF. The moisturizing of the skin plays an important role.

Therefore, when developing cosmetic formulations, natural moisturizing factors can prevent dry skin. Consideration should be given to adding ingredients similar to natural wetting factors. This ingredient is called a moisturizer. A water-soluble substance with high hygroscopicity. The humectant is generally an alcohol such as glycerin, propylene glycol or sorbitol.

Second, sebum and cream cosmetics.

A natural skin care facility has been formed. As a cosmetic, it is required to have a composition and properties similar to those of sebum, and sebum of human skin is an ideal emollient. Sebum and sweat together form a thin layer of sebum covering the outer surface of the skin. It also shows the same function of sebum on the skin.

A breathable film, a sebum film formed by the appearance of sebum on the skin. Many people with oily skin do not feel any pleasure because of the presence of the epidermal sebum film on the skin. Therefore, the cosmetics I use require air and water permeability after application to the skin.

Because of its non-breathable oil quality, the early use of petroleum jelly. Although it can soften the skin, it is difficult to evaporate due to the difficulty of evaporation between the skin and the oil film. With the advancement of cosmetics science, especially the development of interface chemistry and colloidal chemistry technology, it is possible to mix two substances, which are incompatible with each other, by emulsification and solubilization techniques, and mix them together in any ratio. It has the same lubrication and softening effect as sebum, and has good gas permeability and usability. At this time, the oil which is easy to form a gas-impermeable film on the outer surface of the skin can be made into an oil-in-water type paste, and a moisturizing agent is added to form a film through which moisture can pass. When used, there is no feeling of suffocation and moisture can be suppressed. Evaporation, improve or maintain the moisture on the surface of the skin, make the skin surface smooth, reduce friction, and soften the keratin, giving the skin elasticity.

First of all, care should be taken to protect the skin from the loss of sebum and prevent skin dryness. To protect your skin.

Third, the skin is clean.

That is the stratum corneum. The stratum corneum acts as a protective layer against all external changes and the intrusion of harmful substances. Due to the keratinization process, the most important physiological function of the epidermis is the formation of the outer skin. In addition, the presence of Xie products, which are adhered to by the sweat on the skin, causes the skin to become contaminated. Therefore, in order to maintain the health of the skin, the dirt must first be washed away from the skin. This kind of cleaning and descaling is a skin with important physiological functions. It can not cause damage to the skin during cleaning, and should not affect the normal physiological function of the skin. The required cleaning data should be mild and not irritating, and it should not have excessive degreasing ability.

If you use a cleansing cream, a facial cleanser, etc., it is better to use a suitable skin care soap. Because of the excellent detergency that is suitable for the skin, which is unique to the soap, it also contains the essential maintenance functions of the skin, such as emollients and moisturizers.

Both warm water and hot water can dissolve sebum, and water should be considered when cleaning. Relax skin, dilate blood vessels, open sweat glands, promote the discharge of metabolites, and its decontamination effect is stronger than cold water, so people with oily skin should wash their faces with hot water. However, excessive use of hot water to wash the face will reduce the sebum and make the skin dry. Cold water can cause the blood vessels to contract, and the sweat glands and pores are closed. If the toilet is washed with hot water and cold water, it can promote blood circulation of the skin, metabolism is more vigorous, and the skin is shiny and elastic.  

This article originated from China Washing Cosmetics Network , specializing in creating the most authoritative cosmetics investment platform.