MOESM1 of Seeing red: towards an improved protocol for the identification of madder- and cochineal-based pigments by fiber optics reflectance spectroscopy (FORS)

Additional file 1: Table S1. Summary of the recipes used to prepare the madder and cochineal pigments. In most cases, adaption of recipes consists in adapting the temperature of reaction to the dyestuff source (70–80 °C for madder and 40–50 °C for cochineal). Ca-containing substrates were made using standard madder and cochineal recipes but substituting the alkali used for CaCO3. Table S2. Summary of procedures used to make paints using linseed oil, gum Arabic, yolk and beeswax. No additives were added to any of the paints to avoid interference with analysis and to build a reference database of mixtures containing just the binder and the pigment.