Dyeing Machine Control Using In-line Colour Measurement. Part 2: On-line Control of Dye Exhaution Rate

Part 1 of this paper reported a novel method of dyebath analysis, based on an in-line analysis cell with links to a computer-based match prediction system that included compensation for changes in dyebath temperature. We now describe the cell’s use in feedback control of the rate of uptake of dye from the dyebath by controlling the dyebath temperature in conventional (all-in) and continuous-addition dyeing