What is the working principle of the skin tester!T shape Eye massager manufacture

　　What is the working principle of the skin tester

　　1. Principle of skin oil test:

　　The oil test uses the world-recognized SEBUMETER method, which is based on the photometer principle. After a 0.1mm thick special matt tape absorbs the oil on the human skin, it will become a transparent tape, which is transparent. The amount will change, the more oil is absorbed, the greater the amount of light will be transmitted, so that the content of skin oil can be measured. The biggest advantage is that the test probe is small in size, easy to use, and can test any part of the skin. This is an indirect measurement of the secretions of the oil glands. As a result, different skin types can be distinguished, making it possible to accurately understand the changes in oil caused by internal and external causes.

　　2. Principle of skin moisture test:

　　Skin moisture content is determined by internal and external factors. The ability of the stratum corneum to retain moisture varies greatly. The moisture content can vary from 10% to 60%. The most important thing is the breathing process of the skin and the skin. The composition of the water mixture. External factors including environmental temperature, humidity, medicines and cosmetics, etc., can determine and change the moisture content in the skin. The moisture content of the skin will affect the formation of a mixed film of water and oil on the surface of the skin, and this protective film is very important for skin aging. Therefore, it is very useful to quantitatively test the moisture content of the skin and the relative change after a certain period of care.

　　The principle of moisture test is based on the fact that the dielectric constant (<7) of water (81) and other substances varies considerably. According to the difference of water content, the measuring capacitor of the appropriate shape will change with the change of the skin capacitance. The electrical capacity of the skin is within the measurement range, so that the moisture content of the skin can be measured.

　　3. Principle of skin melanin test:

　　The color of human skin mainly depends on the content of melanin in human skin. It is very important to measure the melanin content in the skin quickly and accurately in the development of cosmetics, medical treatment, beauty, medicine and health care products, according to the amount of change in skin melanin. Can develop better whitening and freckle cosmetics. The probe is based on the principle of spectral absorption (RGB), which determines the content of melanin in the skin by measuring the amount of reflection of specific wavelengths of light on the human skin. The transmitter of the probe emits light with a wavelength of 568nm to illuminate the skin surface, and the receiver measures the light reflected by the skin. Since the amount of emitted light is constant, the amount of light absorbed by the skin can be measured, and the melanin content of the skin can be measured. The measurement range of the probe is 0-10. The higher the measurement value, the higher the melanin content in the skin.

　　Fourth, the test principle of skin pH:

　　The pH value of the skin is determined by the water-soluble substances in the stratum corneum, the discharged sweat, the water-soluble oil layer on the skin surface and the discharged carbon dioxide. The skin surface is usually in a weakly acidic state, and the pH range is basically (4.0-6.5). Maintaining the normal weak acid state of the skin can protect the skin from bacteria. Frequent testing of the skin's pH value is very important for studying the effects of cosmetics, detergents and medicines on the skin.

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What is the working principle of the skin tester!T shape Eye massager manufacture

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