Abstract
By the thermodynamics of irreversible processes in the continuous system, the diffusion of the dye within the fibre is explained:
(a) The following results were obtained (in the single dyeing).
(i) The larger affinity the dye has, the smaller its diffusion coefficient is. (the ionized dye).
(ii) In a certain concentration range of NaCl, the diffusion coefficient of the direct dye increases by increasing the concentration of NaCl.
(iii) The diffusion coefficient of the disperse dye is proportional to its mobility and inversely proportional to the affinity.
(b) In the mixture dyeing, the equations were obtained for computing the mutual diffusion coefficients from data for the amounts of dyes adsorbed and the concentration gradients of dyes at the surface of the medium of two or more experiments. These equation hold in the multicomponents system.
