from The Century Dictionary and Cyclopedia
- n. Either of two direct cotton coal-tar colors (benzo-azurine G and 3G) of the diazo type, derived from dianisidine. They dye unmordanted cotton blue in an alkaline salt bath.
Sorry, no etymologies found.
Some time ago, however, it was successfully applied, for the purpose of rendering more permanent, to certain of the Congo colors on cotton, e.g., benzo-azurine, etc., in the application of which, metallic salts had not hitherto been deemed necessary.