Potassium carbonate (K₂CO₃) is used in the textile industry as a mild alkaline agent in processes such as scouring, dyeing, and finishing, particularly for wool and synthetic fibers. Its primary role is to adjust and maintain the pH of treatment baths, enabling effective removal of natural oils, waxes, and impurities, and improving the uptake of dyes.

In scouring, potassium carbonate helps break down and emulsify greasy and waxy substances from raw fibers without damaging delicate materials. In dyeing, especially of protein-based fibers like wool, it creates a stable alkaline environment that promotes even dye absorption while minimizing fiber damage. It is also used in soaping processes to remove unfixed dyes and enhance color fastness.

Its non-aggressive alkaline nature, good solubility, and compatibility with sensitive fibers make it a preferred alternative to stronger alkalis such as sodium hydroxide, especially when working with delicate or specialty textiles.

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