Anionic pigments, with many advantages over reactive dyes, are
perfect alternatives to color cationised cotton for eco-friendly coloring.
First, pigment has faster adsorption rate and shorter coloring
cycle on cationised cotton than reactive dyes, which will improve
coloring efficiency and reduce the energy consumption. In addition,
there is no soaping off procedure needed after pigment coloring,
which will then save a large amount of water and reduce coloring
cost (Hao, Cai, & Fang, 2009; Hao, Wang, Liu, Cai, & Liu, 2012).
By contrast, the nanoscale pigment can provide better coloring
quality than the conventional one with large particle size.