INDIGO AND RING DYEING PROCESS USING HIGH CONCENTRATION OF CAUSTIC AND MATERIAL PRODUCED THEREOF
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United States of America
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Oct 31, 2024
app pub date -
Apr 26, 2024
filing date -
Apr 26, 2024
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Abstract
A method of ring dyeing a yarn comprises a series of steps, including providing a yarn chosen from the group consisting of open-end yarns and ring yarns. The yarn is immersed for between 7 to 40 seconds in a caustic bath having a caustic concentration of 50 to 175 g/l. The yarn is skyed after removal from the caustic bath. The yarn is rinsed in water after skying. The yarn is chosen from one of open-end yarn and ring yarn and is dyed in only one sulfur dye box when the yarn is open-end yarn and ring yarn or is dyed at least one indigo dye box when the yarn is open-end yarn. The yarn is washed in water after the dyeing step and thereafter the dyed yarn is dried.
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