If a cotton/polyester tablecloth is dyed with a reactive dye, a reverse coloration pattern is obtained.
Reactive dyes are dyes that react with fibers to form covalent bonds, forming permanent bonds to the fibers, which could not be removed by repeated treatments with hot water under neutral conditions. As a result, the dye becomes part of the fiber and provides excellent wash fastness.
Dyeing cotton with reactive dyes requires enormous amounts of salt to facilitate the sweeping and sweeping of the dye and large amounts of water to wash the dyed fabric after dyeing. This increases the need for wastewater treatment prior to discharge. Due to the impact on ecosystems and the environmental costs of wastewater treatment being enormous, many alternative options have been proposed.
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