Cottage-scale industry makes very concentrated dye baths because they mix their washing right in there so the silk yarn does not absorb as much dye through the solution. This is cheaper and better for them, but produces darker wastewater which has a larger impact on the environment. Since I am working at a medium-scale industry we have to reproduce the dye bath. Here is Babu measuring out the dye, Narasimhamurty cutting the soap, and Narayanaswamy dissolving the soda– all to be mixed together in 50 liters of water– I’ve also tried 100 liters and it seems to work the same.
So I’ve been placed at a medium-sized textile dyer because there is space and no language barrier. Their wastewater is treated to allowable effluent limits. Although I have tried my project’s technology on their wastewater, it is not much needed. Since this is the case, they are helping me replicate the wastewater that cottage-scale textile dyers in rural areas dump.
Swan Silk Limited has agreed to let me take up space for 2 weeks and I am discussing with their Dye Manager, Prakash Mangalagatti, who has a degree in textile dyeing. He’s an expert and curious about my project. His director is interested in keeping ground water clean for future generations. I am so grateful for their assistance!