Noun
dyebath (plural dyebaths)
The liquid used for dyeing something by submerging it.
In some cases, a dyeing temperature of convert is required, and a pressurized dyebath is used. Source: Internet
When a submerged fabric is removed from the dyebath, the white indigo quickly combines with oxygen in the air and reverts to the insoluble, intensely colored indigo. Source: Internet
With suitable adjustment of dyebath conditions the two components react to produce the required insoluble azo dye. Source: Internet