Guidelines for measurement skin colour and erythema A report from the Standardization Group of the European Society of Contact Dermatitis*

Abstract
This report reviews individual‐related variables (age, sex, race, anatomical site. skin surface properties), intra‐ and interindividual variation (temporal, physical and mental activity, orthostatic effect, menstrual cycle/menopause), environment‐related variables (light conditions, temperature) and various instrument‐related variables that influence skin colour. CIE colorimetry (Minolta Chroma Meter) and spectrophotometric measurement (Derma Spectrometer) are considered. The guidelines give recommendations for measuring conditions and procedures.