Dyeing of the Polyester Fabric with the Fluorescein Molecule

This study examined the effects of dyeing polyester fabrics with a fluorescent dye under different conditions (temperature, pH and fluorophore concentration) on the color intensity and fluorescence quality of the dyed fabrics. Exhaustion dyeing method was applied in this experiment for textile fiber. The dependence of fluorescein on pH has been studied, and a bathochromic and hyperchromic effect of the absorption spectra of its fluorescent solution by going to higher pHs has been shown. In addition, images taken under UV excitation at 365 nm gave different emissions from the treated polyester at different pH values.