also: ナフトルせんりょう
naphthol dye; azoic dye; ice color
Technical term in dye chemistry; refers to a class of dyes formed by coupling a diazonium salt with a naphthol component, often applied to fabric in a cold process.
Naphthol dyes are widely used for dyeing textiles.
Standard technical spelling with ナフトール.
Variant spelling with ナフトル, also used in technical contexts.
From English 'naphthol' + 染料 (dye). The variant ナフトル reflects a common simplification of the long vowel in loanwords.