If you feel there is still unused dye left in the dyebath after you have finished doing your INDIGO dyeing – you can save this and revitalise it by adding more chemicals next time you use it. Remember that the dyebath needs to be a clear greenish yellow to be viable and if it has stood for any length of time, the dye will have reverted to its insoluble state. Covering the dyebath while it isn’t in use will help keep the dye in solution, but before you reuse it, test the bath with some white paper to determine if it needs to be re energised.
If the solution is clear and green you may not need to add anything but it will be most likely you need to add more Soda Ash and Hydros.
Dissolve 75gms Soda Ash in boiling water and add this to the dyebath, then sprinkle 40gms Hydros onto the surface of the dyebath and stir gently until it vats out.
You may also need to heat the dyebath to 60c for this process to be successful. You can do this by adding boiling water to the vat or by using a heat source like an element. Dye technology is complex and while we attempt to simplify our methods as much as possible, results may vary depending on the Indigo you’ve used, the ambient temperature and the temperature of the dyebath. Quality and age of chemicals can also be a factor in the success of your dyeing