Ultraviolet (Ultraviolet) is electromagnetic radiation with a wavelength shorter than visible light but longer than X-rays, ranging in wavelength from 10 to 400 nanometers and with energies from 3 to 124 electron volts. Its name is because the frequency of electromagnetic waves in the spectrum is higher than the purple visible to the naked eye, and it is also known as ultraviolet light. Today we will follow the editor of the Aucure[UV curing machine] manufacturer to learn about this knowledge.
First, the application of ultraviolet light:
1, instrument analysis: ore, medicine, food analysis;
2, application: human health irradiation, trapping and killing pests, oil fume oxidation, phototouch enzyme (titanium dioxide).
3, chemistry: paint curing, pigment curing, lithography;
4, biology: ultraviolet sterilization, promote plant growth, trapping and killing mosquitoes;
Two, the advantages and disadvantages of ultraviolet light
1. Advantages:
1) disinfection and sterilization;
Good for blood color;
3) Promote bone development;
4) Occasionally can treat some skin diseases;
5) Ultraviolet radiation directly affects the synthesis of vitamin D in the human body, and there is no sufficient amount of vitamin D without ultraviolet light.
2. Disadvantages:
1) wrinkles caused by aging skin;
2) Produce spots;
3) Cause rough skin;
4) Causing dermatitis;
5) Cause skin cancer.
3. Ultraviolet light is divided into 4 bands:
1, UVA band, wavelength 320 ~ 400nm, also known as long wave black spot effect ultraviolet.
It has a strong penetrating power, can penetrate most transparent glass and plastic. More than 98% of the UVA contained in sunlight can penetrate the ozone layer and clouds to reach the Earth’s surface. Uva can reach the dermis of the skin, destroying elastic fibers and collagen fibers, and giving our skin a tan. UVA ultraviolet light at 360nm wavelength is in line with the phototaxis response curve of insects, and can be used to produce insect traps. UVA ultraviolet light of 300-420nm wavelength can only radiate near ultraviolet light centered on 365nm through special colored glass lamps that completely cut off visible light, which can be used for ore identification, stage decoration, banknote inspection and other places. In October 2009, German and Italian scientists found that “astaxanthin” can effectively eliminate “ultraviolet UVA” damage to skin cells.
2, UVB band, wavelength 275 ~ 320nm, also known as the middle wave erythema effect of ultraviolet.
Medium penetration, its short wavelength part will be absorbed by the transparent glass, sunlight contains UVB is mostly absorbed by the ozone layer, only less than 2% can reach the Earth’s surface, in the summer and afternoon will be particularly strong. UVB ultraviolet light has a erythema effect on the human body, which can promote mineral metabolism and vitamin D formation in the body, but long-term or excessive exposure will make the skin tanned and cause red swelling and peeling. Ultraviolet health lamps and plant growth lamps are made of special violet glass (not through light below 254nm) and phosphors with peaks near 300nm.
3, UVC band, wavelength 200 ~ 275nm, also known as short-wave sterilization ultraviolet.
It has the weakest penetration ability and cannot penetrate most transparent glass and plastic. Sunlight contains shortwave ultraviolet rays that are almost completely absorbed by the ozone layer. Shortwave ultraviolet radiation is very harmful to the human body, short exposure can burn the skin, long-term or high intensity exposure can also cause skin cancer. Ultraviolet germicidal lamps emit UVC short-wave ultraviolet light.
4, UVD band, wavelength 100 ~ 200nm, also known as vacuum ultraviolet. Its penetration is extremely weak.
It can convert oxygen in the air into ozone, called ozone generation line.
The above explained is the application of ultraviolet light and the classification of several bands of relevant knowledge, Auvcure is specialized in the development and production of various UVLED point light source, [UVLED line light source], UVLED surface light source and [UV curing equipment] manufacturers, and can provide solutions and customization according to the actual needs of customers. The company has Japanese production technology, products are exported to South Korea, Japan, the United States, Brazil and other places. Welcome friends from all walks of life exchange guidance. If you want to know more about the UV curing machine, welcome to consult customer service online or call the company’s service hotline for consultation, we will be happy to provide you with quality service! Some of the information/pictures in this article are from the Internet, only for the purpose of sharing new information in the industry, not for commercial use. If any rights are involved, please inform us immediately, and we will delete it immediately. Thank you.
