Water in supercritical carbon dioxide dyeing

This paper investigates the effect of water serving as entrainer on the dyeing of wool fabrics in supercritical carbon dioxide. Compared with previous supercritical dyeing methods, addition of water makes the dyeing process more effective under low temperature and low pressure. During dyeing process, dyestuff can be uniformly distributed on fabrics?s surface due to water interaction, as a result coloration is enhanced while color difference is decreased. nema