MODELIZATION OF FABRIC REFLECTANCE VARIATION IN RELATION WITH THE CONTENT OF COLORLESS DIRT

It has been verified the adequacy of reflectance measures for the eval uation of colourless dirt in a fabric substrate. Therefore, it has bee n prepared a modelization of fabric reflectance values with regard to dirt content with the purpose of developing a mathematic equation from calibration curves to evaluate the removed or residual dirt in the fa bric, as well as the different steps during the dirt incorporation. It has been mentioned the existing paralelism between detersive efficien cy values obtained from the equations developed in this work, from Kub elka and Munk equation, and direct weighing.