Abstract
Time/absorption relations in the dyeing of the silk and viscose rayon with the direct cotton dye (Diacotton Blue BB (C I. No.406)) were determined. Also, the diffusion coefficients were obtained under the various dyeing conditions, by application of Crank's solution where the dye is diffused into the fiber for a finite dyebath. We observed the following experimental results: In the acid dyeing of silk, the amount of dye absorbed was very slightly decreased by the nonionic detergent (Peletex LT 300, RO (CH2CH2O)n-1CH2CH2CHO. 5g/l). This effect was large in the neutral dyeing of silk and viscose rayon (bright). The experimental data on the acid dyeing of silk was in good agreement with the value calculated by the Crank's equation. These observations are explained satisfactorily by taking into account the interactions between dye, fiber and detergent.
