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Influence of Hard Water on Solubility and Colorimetric Properties of Reactive Dyes

The dyeing process in the textile industry is not only highly water intensive, but also the quality of water plays a substantial role in determining the final shade of the product. Hardness is one of the crucial factors of water quality influencing the final shade of dyed products. The influence of hard water on solubility of reactive dyes and colorimetric properties of reactive-dyed cotton were studied. It was concluded that the solubility of reactive dyes decreased with increased water hardness. Also, hard water significantly affected the colorimetric properties (L*, a*, b*, C*, h°, and DE values) of reactive-dyed cotton fabric. Lightness value increase was accompanied by the decrease in chroma values for all three primary colors studied in this work.