Fig. 5From: Seeing red: towards an improved protocol for the identification of madder- and cochineal-based pigments by fiber optics reflectance spectroscopy (FORS)Decision tree for the identification of madder- and cochineal-based pigments in works of art. For general identification purposes, the ranges shown here have been slightly extended from those measured in this study to allow for variability in individual measurements due to differences in instrumental setup and performanceBack to article page