A quick, practical test procedure to evaluate the performance of instruments used for in vitro UV protection measurements.
The in vitro determination of the UV protection of sunscreens is usually performed by means of transmission measurements with special photometers. Many different instruments are used. Besides numerous commercially available instruments, which are equipped by the manufacturer for the specific measurement, other modular instruments are used. We present here a quick and practical method to evaluate the performance of these instruments with respect to their measuring ranges and to compare the uniformity and reliability of the results obtained with these instruments.
Klette
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Beiersdorf AG, Hamburg, Germany.
Wendel
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Wittern
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Gers-Barlag
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H