S. Benn, J. Blaak, D. Büning, J. Erasmy, S. Hentrey, M. Hoffmann, U. Kortemeier, S. Munke, H. Schelges, D. Segger, G. Springmann, A. Trieder, A. Wanninger
Shower foam volume is a key attribute of skin cleansing products and associated with positive product performance. Thus, its evaluation through reliable methods that translate into consumer sensorial experience is crucial for the development of personal care products. Aim of the present study was to investigate the correlation between sensory panel results (expert and lay) and instrumental analysis. Therefore, five commercially available shower products with different textures and surfactant composition leading to differences in foam characteristics were tested. Subjective results of a lay and various expert sensory panels in a multi-centrical approach were compared to standardized instrumental measurements and analyzed statistically. Concerning weaker foaming products, the ranking was characterized by a reduced correlation or was less clearly identifiable. But the strong foaming formulations were similar identified between the different test approaches and test centers showing a clear correlation for those products.
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