Fabrication of Printed Luminescent Finished Leather using Cu-doped ZnS: A Versatile and Luxurious Innovation

Abstract

This study introduces "Printed Luminescent Finished Leather," a novel finishing effect that enhances leather with a glowing feature. Copper-doped zinc sulfide (Cu-doped ZnS) luminescent pigment was synthesized via mixing and calcination at 600 °C, characterized by photoluminescent spectra (PL), X-ray diffraction (XRD), Fourier-transform infrared spectrometer (FT-IR), and Scanning Electron Microscope (SEM) and Energy Dispersive X-ray (EDX) analysis. The analysis confirmed that Cu-successfully doped on ZnS nanostructure and exhibited Luminescent behaviour. Six leather samples, prepared with varying pigment quantities (3-7 gm/sq. ft), types (liquid and powder), and application methods (spraying, masking, stenciling, drop staining), and were evaluated through standard performance tests. These tests assessed color rub fastness, wash fastness, heat and perspiration resistance, with all samples scoring between 3 and 5 on the grey scale for finish film appearance and glow intensity under the both daylight and UV light. The adhesion strength of the finish film exceeded 200 gm/cm. The study found that a total luminescent pigment quantity of 7 gm/sq. ft yielded optimal results, with sample 5 exhibiting the best combination of glow intensity, adhesion, and persistence. The addition of luminescent pigments transforms ordinary leather into a visually appealing material, offering diverse applications such as fashion items, accessories, luxury upholstery, and interior design. This innovation holds significant economic potential for the leather sector, positioning it as a high-value product that can drive exports and satisfy consumer demands in global markets.