what is mercerized cotton yarn

Mercerized cotton yarn is a type of cotton yarn that has been treated with sodium hydroxide, also known as caustic soda, under tension, which causes the fibers to swell and become stronger and more receptive to dye. The process of mercerization makes the yarn lustrous, silky, and less likely to pill. Mercerized cotton yarn is shinier and stronger than non-mercerized cotton yarn, and dye takes to it more easily, producing richer tones. However, mercerized cotton yarn sacrifices some softness for its strength. Long-staple cotton varieties, such as Egyptian and Pima cotton, respond best to mercerization. Mercerized cotton yarn is used for a variety of projects, including kids clothing, summer tops, shawls, and fine crochet thread used for doilies and other delicate projects.