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Noun: vat colour
Usage: Brit, Cdn (US: vat color)
  1. A water-insoluble dye that is applied by reducing the dye to an alkaline form, applying the dye, then regenerating the insoluble dye by oxidation in the material; used for dyeing cotton
    - vat dye, vat color [US]

Derived forms: vat colours

Type of: dye, dyestuff