What does tanning mean? It is a woman's nature to love beauty. Many women pay great attention to their own skin care problems, so they will pay attention to some skin care knowledge, and tanning undoubtedly touches our knowledge blind spot. Then let's take a closer look at what tanning means.

What does tanning mean? What is tanning 1?

Suntan is to make the skin black and beautiful. With the growing strength of China, people's lives are more colorful. Bronze skin and wheat skin, which have always been popular, have become the mainstream. With special cosmetics and irradiation under sunbathing, beautiful bronzed black and chocolate skin is maintained, and dark and healthy skin color is more wild and beautiful, just like obsidian.

What effect does tanning have on the skin?

Fast tanning products usually contain glucocorticoids, which will make the skin black in a short time, but with the passage of time, there will be problems such as acne and pigmentation. It is suggested to use drying lamp to achieve healthy and safe tanning.

What is the healthiest tanning method?

Tanning is the choice of most people. Although it takes some time and is expensive, tanning is the safest and healthiest tanning method at present. Harmful rays in natural ultraviolet rays are filtered out from artificial ultraviolet rays used for drying lamps, which greatly reduces the danger.

How long is the first sun exposure?

Suntan needs to go through two periods: "coloring period" and "holding period". The coloring period is the key period for the skin to produce and accumulate melanin, so it is necessary to sunbathe at close range and frequently, about once every other day. The initial sunbathing time is below 10 minute, and then adjust the sunbathing time according to your own situation. After entering the storage period, you can sunbathe once a week or two to maintain your skin color and avoid fading. The frequency of sunbathing is mainly related to skin metabolism.

What does tanning mean? 2 What is tanning?

Suntan is to make the skin black and beautiful. With the growing strength of China, people's lives are more colorful. Bronze skin and wheat skin, which have always been popular, have become the mainstream. With special cosmetics and irradiation under sunbathing, beautiful bronzed black and chocolate skin is maintained, and dark and healthy skin color is more wild and beautiful, just like obsidian. Paint your skin with a layer of bronze, which becomes the focus of chocolate temptation in the sun. This is a tanning ceremony that every hipster must do every summer. Black beauty is too powerful.

Tanning principle

According to the different wavelengths of sunlight, there are three kinds of light that can be used for exercise: infrared light with a wavelength above 760 nm, visible light with a wavelength of 400-760 nm, and wavelength.

180 ~ 400 nm ultraviolet. The above three kinds of rays have different effects on human body.

Sunlight has invisible and warm infrared rays, chemically active ultraviolet rays and visible light. Ultraviolet light can transform 7- dehydrosterol in skin into vitamin D, which can improve calcium and phosphorus metabolism, prevent rickets and osteomalacia, promote calcification of tuberculosis focus, heal fracture after reduction and prevent tooth loosening. Infrared rays can penetrate the epidermis and reach deep tissues, which will increase the temperature of irradiated tissues, dilate blood vessels, accelerate blood flow and improve blood circulation. If the radiation is intense for a long time, the whole body temperature can be raised. The' visible light' in the sun mainly stimulates people's emotions through vision and skin, which can make people feel comfortable. Ultraviolet light is the spectrum with the strongest effect on human body in sunlight, which can strengthen blood and lymphatic circulation and promote the process of substance metabolism; It can convert ergosterol in skin into vitamin D, regulate calcium and phosphorus metabolism and promote normal bone development. However, a large amount of ultraviolet radiation can cause erythema, protein decomposition, skin cell degeneration, release histamine into the blood, stimulate the hematopoietic system, increase red blood cells, white blood cells and platelets, and make phagocytes more active. Repeated exposure to sunlight, due to ultraviolet light, melanin in the skin is transformed into melanin, and the exposed skin presents a uniform and healthy black color. Melanin can absorb more solar radiation, convert it into heat energy and stimulate sweat gland secretion. Sunlight is also a natural disinfectant, and various microorganisms quickly lose their vitality under ultraviolet radiation.

Precautions for tanning

Suntanning is a method of exercising or preventing chronic diseases by using sunlight, which mainly makes sunlight shine on human skin, causing a series of physical and chemical reactions, thus achieving the purpose of fitness and treatment. Tanning is usually combined with cold water bath and air bath.

1, tanning is prohibited when there are serious diseases such as heart disease, tuberculosis, fever and bleeding;

2. In case of nausea, dizziness, heat annoyance and other reactions during irradiation, stop immediately and rest in the shade; After re-irradiation, it should be reduced appropriately;

3. When fatigue, insomnia and loss of appetite occur after tanning, it may be the accumulation of sunshine, so you should rest for a few days and continue irradiation after the symptoms disappear;

4. It is best to take a short air bath before each tanning, and then wipe your body with cold water after tanning.