COMPOSITIONS AND VISUAL PERCEPTION CHANGING METHODS

摘要

A composition includes at least one visual indicator dye and a surfactant. Upon dilution of the composition with a volume of water a diluted product is formed, and wherein: i) the extinction coefficient of the composition is less than the extinction coefficient of the diluted product measured at a wavelength from about 400 nm to about 700 nm; ii) a ratio of an absorbance measured between about 550-650 nm and an absorbance measured between about 395-440 nm increases upon increasing dilution of the composition; and/or iii) the pKa of the composition is greater than the pKa of the diluted product. Additionally, methods for changing the visual perception of a composition comprise diluting a composition.