Silk has natural lustre and smoothness and elasticity. Silk threads have all the characteristics of silk, its smooth quality making it an ease to sew with. It also has appropriate strength and elasticity, fits the fabric well and doesn't hurt even the most lightweight of fabrics.
It is engineered as the perfect thread for making hand made buttonholes with and other tailoring techniques.
Gimp thread is a narrow ornamental trim made of silk, wool, or cotton and is often stiffened with metallic wire or coarse cord running through it. Gimp threads are the skeletons of hand made buttonholes.