ISSN:
1468-2494
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Medizin
Notizen:
Water resistance of sun protection products has been found to be best determined by the following methods:(1) Tests for determining UVL filter adherence to merino wool; this gives a rough value for orientation. Values in excess of 6% are suggestive of satisfactory adherence. (2) Tests for determining water resistance of sunscreen products on pig skin constitute a further essential step. Values in excess of 50% provide a realistic basis for tests in humans.In addition to filter adherence the product base, i.e. primarily the emulsifiers, are of special significance. Adequate results can be obtained with both W/O and O/W systems.Tests on volunteers are best done at the time of determining the sun protection factor, i.e. when simulating the events during a 2–3 h sunbath. Simulation should involve a single application of the test product in a pre-defined quantity and all activities conmmonly done in sunlight, e.g. swimming, as well as intermittent exercises to induce sweating.Values are considered as excellent, if 1 MED is not exceeded after 3 h exposure. Sun protection products with this characteristic qualify as adequate ‘all-day’ sunscreen for individuals with average sensitivity. Methodes pour mesurer la résistance à l'eau des produits anti-solaires
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1111/j.1467-2494.1979.tb00209.x
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