A robust sebum, oil, and particulate pollution model for assessing cleansing efficacy of human skin

Abstract
With increasing concerns over the rise of atmospheric particulate pollution globally and its impact on systemic health and skin ageing, we have developed a pollution model to mimic particulate matter trapped in sebum and oils creating a robust (difficult to remove) surrogate for dirty, polluted skin.
ObjectiveTo evaluate the cleansing efficacy/protective effect of a sonic brush vs. manual cleansing against particulate pollution (trapped in grease/oil typical of human sebum).
MethodsThe pollution model (Sebollution; sebum pollution model; SPM) consists of atmospheric particulate matter/pollution combined with grease/oils typical of human sebum. Twenty subjects between the ages of 18–65 were enrolled in a single‐centre, cleansing study comparisons between the sonic cleansing brush (normal speed) compared to manual cleansing. Equal amount of SPM was applied to the centre of each cheek (left and right). Method of cleansing (sonic vs. manual) was randomized to the side of the face (left or right) for each subject. Each side was cleansed for five‐seconds using the sonic cleansing device with sensitive brush head or manually, using equal amounts of water and a gel cleanser. Photographs (VISIA‐CR, Canfield Imaging, NJ, USA) were taken at baseline (before application of the SPM), after application of SPM (pre‐cleansing), and following cleansing. Image analysis (ImageJ, NIH, Bethesda, MD, USA) was used to quantify colour intensity (amount of particulate pollutants on...

Source: International Journal of Cosmetic Science - January 30, 2017 Category: Dermatology Authors: G. Peterson, S. Rapaka, N. Koski, M. Kearney, K. Ortblad, L. Tadlock Tags: Research communication Source Type: research