Abstract
Efficacy tests of cosmetic products are carried out worldwide according to specific, recognized scientific procedures and criteria. For a typical long-term test regarding the increase of stratum corneum hydration after application of a specific product, volunteers are invited to visit the testing laboratory. Before starting the tests, volunteers have to acclimatize to the ambient conditions for a certain time period in order to have their skin conditioned to the relative humidity and room temperature of the measurement environment. Subsequently (normally after 30 min) the stratum corneum hydration will be measured on the skin area to which the product will be applied and on an untreated control site, comparing treated and untreated skin. This is called baseline or initial value at time point T0 [2].
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© 2011 Springer-Verlag Berlin Heidelberg
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Khazaka, G. (2011). Compliance Check with On-Site Measurements: Advanced Ways in Product Testing. In: Fluhr, J.W. (eds) Practical Aspects of Cosmetic Testing. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-05067-1_24
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DOI: https://doi.org/10.1007/978-3-642-05067-1_24
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