(Of a dye) related to indigotin in molecular structure.
- Indigo, the parent compound of the indigoid class of dyes, has been in use as a vat due since before recorded history.
- The present invention relates to a process for preparing from 5 to 60% strength by weight aqueous alkaline solutions of reduced indigoid dyes.
- Indigoid dyestuffs are commonly referred to as indigo.
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