Want to white like toilet paper or even light bulbs, sunscreen can not relax for a day, not to mention the hot sun in the sky. Some beauty-loving women urgently add sunscreen to their shopping lists every summer.
In professional terms, sunscreen is mainly about preventing light and heat, the most important of which is to prevent the direct exposure of UV rays to the skin, so that the skin is protected from the danger of UV rays turning red or black.
There are UVA (long wave ultraviolet), UVB (medium wave ultraviolet), and UVC (short wave ultraviolet). UVA has a strong penetrating force, can reach the true layer of skin, damage elastic fiber and collagen egg white fiber, the skin tan; UVB can promote mineral metabolism and vitamin D formation in the body, but durable or excessive will make the skin tan, causing swelling and peeling; UVC is the most dangerous to the human body. It can burn the skin for a short time, and can even cause skin cancer after prolonged or high intensity exposure.
Last year’s sunscreen will be less protective
Certificate of China “Evaluation of Textile UV Protection Performance” related delimited: when the UPF (UV protection factor) value of the product exceeds 30, and the UVA transmittance is less than 5%, it is called “UV protection product”. That is to say, clothing surface speculation up to the above performance, only called sunscreen clothes.
In addition, the label of sunscreen clothing should include the following three aspects:
Scale number, i.e. GB/T18830;
UPF: 30+ or 50+;
The protection provided by the product may be reduced under durable use or wet conditions.
Sunscreen clothing is usually divided into three kinds:
1, colorful cotton fabric, red, blue and other bright colors of UV isolation rate is the largest;
2, sunscreen cloth, is to add sunscreen additives in the cloth, if there is a special need, you can hold the cloth after finishing, that is, the fabric density is higher;
3, special fabrics, such as silver reflective material, etc.
Sunscreen additives have been added to most of the fabrics of sunscreen clothing on the market, or ceramic powders have been connected with fibers to increase the reflection and scattering of ultraviolet rays outside the clothing. Good sunscreen not only blocks UV rays, but also draws sweat out of the fabric and dries it quickly. Poor quality fabric moisture absorption and air poor, long time wearing easy to make people feel uncomfortable.
According to the industry, the actual popular clothes have a certain sunscreen effect. For people who need to go outdoors for long periods of time or have special requirements for sun protection, sunscreen clothes are needed.
Should I Buy sunscreen?
First, look at the sign. When buying sunscreen clothes, we should pay attention to clothing signs, regular sunscreen clothing fabric made of sunscreen clothes, the city is marked with clear sunscreen parameters on the clothing signs, the higher the protection factor, the better the effect. If not, don’t buy it. It is recommended to select clothing products with UPF value greater than 30 and UVA transmittance less than 5%. Also see the fabric factor on the sign, there is no titanium inside, titanium clothing fabric effect is good.
Remember to follow the product instructions for washing, pay attention to the sunscreen clothes in frequent washing or stretching may reduce the sunscreen performance of clothing.
Second, choose the fabric. When buying sunscreen clothes, we should look at the clothing fabric, whether the fabric is smooth and fine, you can look at the sun or light, the less light transmission, the better. Conditions permit, you can also use small instruments with ultraviolet effect to distinguish sunscreen clothes, such as banknote detector and so on.
It is important to pay attention to the sun protection, but also to take into account the breathability of clothing. Another fabric factor, generally speaking, in the chemical fiber, polyester sunscreen effect is better than nylon, nylon is better than rayon, silk, etc. Only choose sunscreen that protects large areas and is breathable.
Third, pick the color. As a general rule, dark clothes have better sunscreen than light ones, and sunscreen fabrics have better sunscreen than plain fabrics. Dark clothing fabric is better than other colors, but dark heat absorption is too strong. Dark red and navy blue can be selected. Light-colored clothing has poor UV protection, and it is rare that those dazzling white cotton clothing may contain fluorescent brighteners.
