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. 2019 Aug 30;41(5):411–424. doi: 10.1111/ics.12562

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© 2019 The Authors. International Journal of Cosmetic Science published by John Wiley & Sons Ltd on behalf of Society of Cosmetic Scientists and Société Française de Cosmétologie.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Colour mappings of skin surface pH and transepidermal water loss (TEWL) displayed on a mean face per group, from left Caucasians, Black Africans, Indians. Top row: standard VISIA‐CR portraits in cross‐polarised light mode, natural skin colour. Middle row: skin surface pH mappings, Bottom row: TEWL mappings. Colour code for pH values (5.5‐6.4) and TEWL values (10‐40 g m⁻² h⁻¹) shown on the scales on the right side.