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Sunburn effect (as measured by the UV index) is the product of the sunlight power spectrum (radiation intensity) and the erythemal action spectrum (skin sensitivity) across the range of UV wavelengths. [9] [10] The UV index is a number linearly related to the intensity of sunburn-producing UV radiation at a given point on the Earth's surface.
800-290-4726 more ways to reach us. Sign in. Mail. 24/7 Help. ... Experts explain the purpose of the UV Index Scale and how to stay safe in the sun. ... The indexes range from 0-11 and indicate ...
Contact us; Contribute Help; Learn to edit; ... 5 How is UV index a function of time to sunburn? 2 comments. 6 Unable to find source for 'Index Usage' section.
The ultraviolet (UV) radiation in light is responsible for ink fading. As the intensity of UV radiation differs from place to place, the ink fading also depends on place. It will be more in areas with more UV radiation and vice versa. This difficulty is overcome by the bluewool testing method. Absolute values of fading will depend on light ...
The Planckian locus on the MacAdam (u, v) chromaticity diagram. The normals are lines of equal correlated color temperature. The CIE 1960 color space ("CIE 1960 UCS", variously expanded Uniform Color Space, Uniform Color Scale, Uniform Chromaticity Scale, Uniform Chromaticity Space) is another name for the (u, v) chromaticity space devised by David MacAdam.
Mettler Toledo developed a single beam array spectrophotometer that allows fast and accurate measurements over the UV-Vis range. The light source consists of a Xenon flash lamp for the ultraviolet (UV) as well as for the visible (VIS) and near-infrared wavelength regions covering a spectral range from 190 up to 1100 nm.
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In grey scale the lightfastness is rated between 1–5. 1 being very poor and 5 being excellent lightfastness. [1] [2] [10] On ASTM scale the lightfastness is rated between I-V. I is excellent lightfastness and it corresponds to ratings 7–8 on Blue Wool Scale. V is very poor lightfastness and it corresponds to Blue Wool scale rating 1. [10]