Colorant formulation based on new two‐constant theory

A new two‐constant theory for colour matching has been developed based on the Kubelka–Munk theory. Colorant formulations and algorithms for matching tristimulus, K/S and reflectance values of a standard are presented based on the new theory. The algorithms are suitable for a single‐constant theory as well as a two‐constant theory. The experimental data show that the recipes predicted by the new two‐constant theory are closer to the actual recipes of the standard sample than the recipes predicted by the single‐constant theory, and also show smaller colour difference values for some disperse dyes. The results show that the scattering of some disperse dyes cannot be negligible, and that the recipes that match to textiles coloured by these disperse dyes should be predicted using the new two‐constant theory.