Optical thin film polymeric sensors for the determination of aqueous chloride, bromide and iodide ions at high pH, based on the quenching of fluorescence of two acridinium dyes

Conventional and Coloursafe® modified nylon 6,6 fabrics were printed with reactive dyes from various commercial ranges. Maximum colour yield was achieved using saturated steam as fixation medium and pH 4¯5. The colour yield obtained on Coloursafe fabric was higher than that achieved on conventional nylon 6,6. A simple wash-off process was used to remove unfixed dye and print paste from the printed fabrics. The prints displayed excellent fastness to repeated wash testing and to cold water contact fastness. The print paste was stable after up to 3 months storage.