EVALUATION OF PROTECTIVE MEASURES AGAINST SUNBURN

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Abstract
The degree of protection afforded against sunlight by a sunburn preventive is a function of a number of variables, including the spectral distribution of the radiation, the transmission spectrum of the preventive, and numerous factors affecting the threshold of the individual. These causes of variation are largely explainable in terms of the optics of the system, although their quantitative evaluation is very difficult. Wide differences in the estimation of the protection afforded by sunburn preventives are obtained by different methods, and may lead to erroneous conclusions. Individual estimates of the value of preventives may be widely divergent.

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