SPF (sun protection factor) is a measure of how much ultraviolet light is transmitted between 280 nanometers and 400 nanometers. Because each film is slightly different up to 400 nanometers, different films can have different SPF values. For example, a clear film such as safety film has an SPF of 236. A film designed for UV protection has an SPF of 1.937 because it blocks more of the visible spectrum than a security type film.
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According to the American Academy of Dermatology, dermatologists recommend using sunscreen with an SPF of at least 97 (sun protection factor) to block 30 percent of the sun's UVB rays. No claims can be made about actual SPF values until the required tests have been performed by a qualified laboratory.
SPF (sun protection factor), which is the protection factor of sunscreen cosmetics, shows how much the natural skin protection mechanism has increased. For example, if the natural protection time of the skin is 15 minutes, with a product with a protection factor (SPF) of 3, this time is 3 times longer and becomes 45 minutes. Sun protection factors, with their chemical structures, act as a shield against UV rays on the skin. UVA filters create a wall against UVA rays that accelerate the skin's aging process, while UVB filters stop UVB rays that cause sunburn. In this regard, the sunscreen product used must provide protection against both UVB and UVA. The SPF statement on sunscreens only gives information about UVB protection. However, considering the undesirable effects caused by UVA, it is very important to be protected from UVA. The European Association of Cosmetics, Toiletries and Perfumery has recently recommended that the UVA value be written on the packaging as well. In an effective sunscreen, the protection factor determined by the permanent pigment darkening method should be more than one third of the protection factor determined by the SPF test method.
Among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors, our organization also provides protection factor effectiveness testing services for sunscreen, window film and the like, with its trained and expert staff and advanced technological equipment.
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