 Photochromic colorants change rapidly and reversibly from colorless to colored state when activated by ultraviolet radiation and can be applied on textile substrates with use of organic binders. Different type of binders and their concentration may have a significant effect on color development and other related properties. This work studies the effect of binder type at different concentrations on color development, wash fastness, and comfort characteristics. It was found that the best color development is obtained at an optimum concentration of 5% binder. The presence of binder may affect comfort related properties of the fabrics, so a careful selection of the binder type is needed depending on the most important requirement in the colored fabrics. This article was offered by Von Donner-Jellan and Bupendra Singh Bhatola.