Extraction of non-toxic vegetable dyes, for use in lipsticks or other cosmetics, by extracting parts of plants, especially of the Boraginaceae family, with organic solvent and concentrating the extract

摘要

Extraction of organic dyes (I) from plant materials involves extracting parts of the plants with organic solvents, reducing the amount of solvent, concentrating the extracts under reduced pressure and optionally treating with acid or base to modify the color.