WHAT IS MERCERIZED COTTON: Mercerization is a process applied to cellulosic fibers -typically cotton - to increase luster. Not only is the color brighter, it also gives the cloth a better resistance to multiple washings, keeping the colors bright and unchanged over time. In addition to increasing luster and affinity to dyestuffs, the treatment increases strength, smoothness and also reduces lint. Higher quality yarns and fabrics are always mercerized.