Abstract
The dyeing of ramie fabrics crosslinked with 1,2,3,4‐butanetetracarboxylic acid has been studied using a typical direct dye CI Direct Red 81. Adsorption time curves from finite baths of untreated ramie, tension‐mercerised ramie, slack‐mercerised ramie and cotton fabrics have been compared. It has been found that mercerisation improved the equilibrium adsorption and dyeing rate, while it reduced the maximum dye adsorption and equilibrium constant on ramie fabric. Crosslinking with butanetetracarboxylic acid decreased most of these parameters related to the dyeing profile, although the activation energy of dyeing was increased. A pore model approach has been used to explain the changes in dyeing properties arising from the crosslinking of ramie using butanetetracarboxylic acid.
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