Abstract
SummaryMicrospectrophotometry has been used to define red and brown hair pigments in man. Comparisons have been made between red pigments examined by this method and pigments which have been extracted by various means. There is some evidence that methods of extraction of pigments from hair may cause substantial alteration in character of the pigments. Comparisons have been made between microspectrophotometry and reflectance spectrophotometry and it is thought that the former is the more sensitive method for the study of hair pigments. Evidence has been obtained that red hair is a separate and definable phenotype and not part of a continuous distribution of colours including black and brown. The mosaicism which can occur in both red‐ and brown‐haired subjects has been studied and a genetic hypothesis relating to this mosaicism is discussed.
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