Abstract
Ethanol extract of natural dye obtained from the flower of Cordia Sebestena applied on bleached cotton fabric have been subjected to pre, post and simultaneous mordanting with selective mordants using myrobolan (harda) and other mordants (metallic salts). It is observed that the application of 1-3% of FeSO4,Al2(SO4)3 and SnCl2 have been identified as three most prospective mordanting system. The study on the effect of dyeing process variables on surface colour strength indicates that the 60 min. dyeing time, 60°C dyeing temperature, 1:20 material-to-liquor ratio, 3% mordant concentration, 5% dye concentration and 5gpl common salt are the optimum values among the different fibre- mordant system studied. This study also includes the comparison of mordanting techniques as well as dying properties and visualizes the effect of myrobolan and metallic mordants, colour fastness to washing, rubbing, light fastness and perspiration of cotton fabrics dyed with and without mordants have also been studied.