Reduction dyeing method

…The mordant dyeing method is a method in which a mordant is applied to the fiber beforehand when the dye does not have affinity for the fiber, and the fiber is dyed using this as an intermediary, but in recent years, the dye is often combined with a mordant metal and dyed like a direct dyeing method. The reduction dyeing method, also known as the vat dyeing method, is a method in which a water-insoluble dye is reduced to a soluble form using various alkaline reducing agents, and then oxidized after dyeing due to the affinity of the reduced form to make the dye insoluble. The development dyeing method is a method in which one of the components of an azo dye, the diazo component, is first absorbed, and the other coupling component is coupled on the fiber to make an insoluble azo dye. This method is also called naphthol dyeing, and is often used in textile printing. …

*Some of the terminology that refers to the "reduction dyeing method" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…媒染染法は染料が繊維に親和性をもたないとき，あらかじめ媒染剤を繊維に施し，それを仲介として染める方法であるが，近年は染料と媒染金属を結合させておいて直接染法のように染めることが多い。還元染法は建染染法とも呼ばれ，水に不溶の染料をアルカリ性の種々の還元剤を用いて還元し可溶の形とし，還元体の親和性により染色後酸化し不溶の形の染料とする方法である。顕色染法はアゾ染料の成分の一方のジアゾ成分をまず吸収させ，他のカップリング成分を繊維上でカップルさせ不溶のアゾ色素とする方法で，ナフトール染色とも呼ばれ，捺染に多く用いられる。…

※「還元染法」について言及している用語解説の一部を掲載しています。

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