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A relatively new rating designation for sun protective textiles and clothing is UPF (ultraviolet protection factor), which represents the ratio of sunburn-causing UV measured without and with the protection of the fabric. For example, a fabric rated UPF 30 means that, if 30 units of UV fall on the fabric, only 1 unit will pass through to the skin.
Horizontal low-pressure tanning bed. Indoor tanning involves using a device that emits ultraviolet radiation to produce a cosmetic tan. [a] Typically found in tanning salons, gyms, spas, hotels, and sporting facilities, and less often in private residences, the most common device is a horizontal tanning bed, also known as a sunbed or solarium.
In 1978, both sunscreen with an SPF 15 rating as well as tanning beds first appeared. In 2007, there were an estimated 50,000 outlets for indoor tanning; it was a five-billion-dollar industry in the United States, [ 46 ] and had spawned an auxiliary industry for indoor tanning lotions including bronzers, intensifiers, and accelerators.
Values (US units) range from 1.6 for 80-gram fabric to 2.9 for 200-gram fabric. [13] Thinsulate is considered "the warmest thin apparel insulation" available. In fact, when equal thicknesses are compared, it provides about 1½ times the warmth of down and about twice the warmth of other high-loft insulation materials.
The S numbers originated in England, [4] where the worsted spinning process was invented and arose from the worsted yarn count system for stating the fineness of yarn. The worsted count (also known as the Bradford count) was the number of 560-yard (510 m) lengths (hanks) of worsted yarn that 1 pound (0.45 kg) of wool yields. [5]
Microfiber fabric is lightweight, durable, and somewhat water repellent, so it makes a good substitute. Another advantage of microfiber fabric (compared to leather) is that it can be coated with various finishes and can be treated with antibacterial chemicals. Fabric can also be printed with various designs, embroidered with colored thread, and ...
Schematic for Choke Ballasts: Note the use of one ballast per lamp, one lamp starter per lamp and a capacitor. Tanning beds may use 1 or several capacitors, depending on rating. These systems require 230 V AC Schematic for HF Ballasts: It is much simpler as everything is self-contained. The main disadvantage is price, costing several times more ...
Drop of water on 100% polyester textile. Waterproof/breathable fabrics resist liquid water passing through, but allow water vapour to pass through. Their ability to block out rain and snow while allowing vapour from sweat to evaporate leads to their use in rainwear, waterproof outdoor sports clothing, tents, and other applications.