Abstract
Decoloration processes caused by the ozonation of sixteen water-soluble dyes were evaluated by several color measurement methods, and then, the characteristics and relationship between them were investigated. An attempt was made to propose a feasible color control method.
Initial decoloration processes measured by absorbance method were represented as a pseudo-first order reaction. On the other hand, they were not represented by color difference method. The behavior of initial decoloration processes measured by dilution method was relatively similar to that measured by absorbance method. The values measured by both absorbance and dilution methods were correlated by an exponential regression line. Based on this correlation, a feasible color control method corresponding to an aesthetic sense was proposed.
