Abstract:
Wool and silk fibres have been effectively dyed
with an aqueous extract of C. sinensis from an acidic dye
bath (pH * 4.0). Methanol extract of the dye has been
used for measuring different kinetic and thermodynamic
parameters. The results indicate that the dye has an affinity
for wool and silk. The standard affinity value of C. sinensis
for wool fibre is greater than that for the silk fibre and it
increases with the increase in temperature. Rate of dyeing
for wool is lower as compared to that of silk. Studies on
adsorption isotherm indicate that this dye is adsorbed on
protein fibres chiefly following Langmuir adsorption
mechanism
