Abstract
The Dacsol process (J. & P. Coats Ltd) is a totally non‐aqueous system designed principally for dyeing polyester fibre with existing disperse dyes, thus enabling fastness levels to be maintained. It is a bicomponent homogeneous system using perchloroethylene and a silicone fluid. Dyeing takes place in a pressurized dyeing machine at elevated temperatures and for times as low as 30 min. Residual solvent and surface dye are removed by rinsing with acetone, which facilitates steam drying. It is a dry‐to‐dry process. The dyeing and rinsing solvents are recovered by decolorizing with activated carbon and by distillation.
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