ice dye; azoic dye
Technical term in dyeing and textile chemistry. Refers to insoluble azo dyes formed on the fiber by coupling a diazonium salt with a naphthol component, typically cooled with ice during the process. Also called 氷染染料 or ナフトール染料.
See also: 氷染染料 · ナフトール染料 (ナフトールせんりょう)
Ice dyes are used in a dyeing method that forms insoluble azo pigments on the fiber.
In this factory, they use ice dyes to produce vivid colors.
From English 'ice' + 染料 (dye), referring to the cooling with ice during the dyeing process.