As you may know, There are Metallic Yarns that mostly NYLON,RAYON or POLYSTER YARNS etc are supported,twisted or covered with Metallized colr films slitted(M-TYPE).

The types of metallic yarns are classified according to twisting and applications as follows.
There are MX, MH,MHS,ST,and MR.
   
MX MH MHS ST MR