black naphthamine direct black
1naphthamine dye — ˈnaf]thəˌmēn , ÷ ˈnap], mə̇n noun Etymology: International Scientific Vocabulary naphth + amine : any of several direct azo dyes see dye table I (under Direct Yellow 9 and Direct Black 19) …
1naphthamine dye — ˈnaf]thəˌmēn , ÷ ˈnap], mə̇n noun Etymology: International Scientific Vocabulary naphth + amine : any of several direct azo dyes see dye table I (under Direct Yellow 9 and Direct Black 19) …