05.18.23
US Patent No. 11,648,191 B2 (Sarah Elizabeth Lucas, John Mama, David Malcolm Lewis); Perachem Limited, Leeds, Great Britain, has patented method of coloring eyebrows. It entails use of an aqueous composition (at least 60% water) that contains one or more dye compound containing at least one sulfonate group, at least one carboxylate group, or both; citric acid; benzyl alcohol and ethanol. The composition stains the hairs of an eyebrow and the skin in the brow area.