Volume 1 Issue 1
Modified acid colour dyeing of silk for energy preservation
Abstract – Textile wet processing, particularly dyeing, consumes considerable amounts of water and thermal energy. In the recent times, both water and thermal energy are rapidly becoming more and more expensive and therefore there is a need to conserve them for better tomorrow. Various modifications in the dyeing system have been adopted to make the energy conservation feasible. Performing the dyeing process at lower dyeing temperature and for short duration can lead to the conservation of energy. This can be done by the utilization of an appropriate solvent for physical modification of the substrate and subsequently dyeing it at lower temperatures and for shorter duration in order to conserve energy. The solvent used for the pretreatment of silk substrate is acetophenone. Commercial anionic acid dyes have been applied on the solvent pretreated silk substrates at different dyeing temperatures, ranging from room temperature to 70o C and the results compared with conventionally dyed samples, in terms of colour strength values and fastness properties of the dyed samples. The solvent treatment not only aids in reducing the dyeing time and temperature but also retains the aesthetic values associated with silk fibre.
Keywords: solvent, silk, acid dyes, fastness characteristics, energy conservation