Studies on Mixture Dyeing. II. The Kinetics of a Mixture of Chrysophenine G and Sirius Red 4B

Abstract
1) The single and mixture dyeing of Chrysophenine G (C.I. Direct Yellow 12) and Sirius Red 4B (C. I. Direct Red 81) have been examined kinetically. 2) The affinity and the diffusion coefficient of each dye at 90, 85 and 80°C have been evaluated. The apparent activation energy of diffusion at a constant surface concentration has been calculated. 3) In the mixture dyeing, although the apparent diffusion coefficient of each dye became larger than that in the single dyeing, whose surface concentration was similar to that in the mixture dyeing, the dye with the smaller diffusion coefficient had a more profound effect on the diffusion of the dye with the larger diffusion coefficient than in the reverse case.

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