The colour yield (K/S) is a parameter used in textile domain; it allows the evaluation of the dyeing quality of fabric. It is evaluated by light reflectance measurements using SF 300 spectrophotometer with dataMaster 2.3 software (Datacolor International, USA).
Relative colour yields (K/S values) were determined using the KubelkaeMunk equation (Kubelka and Munck, 1931):