An Evaluation of the Effects of Amino Acid Dissociation Constants on the Rate of Dyeing of Wool with C.I. Acid Violet 48

The relative uptake of C.I. Acid Violet 48 by wool from a 2 % dyebath under reflux was found to increase in the presence of the amino acids histidine, beta-phenylalanine, alanine or valine after only 1.5 min dyeing. This enhancement was inversely related to the dissociation constants of the amino acids