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1 February, 13:05

What type of radiation constitutes the basis for setting an spf rating

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  1. 1 February, 13:16
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    UV Radiation

    Explanation:

    Sun Protection Factor (SPF) SPF is a measure of how much solar energy (UV radiation) is required to produce sunburn on protected skin (i. e., in the presence of sunscreen) relative to the amount of solar energy required to produce sunburn on unprotected skin.
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