Answers are grounded in this paper and cite their sources.
Ethylenediamine tetra (methylenephosphonic) acid when adsorbed by cotton fibres prior to the application of the direct dye Solamine Fast Red 4BL causes a marked increase rate of dyeing. It also improves the wet fastness properties of the dyed cotton.
No takes yet. Share an insight, caveat, or question.
Riad et al. (1991) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: