metallic yarn: products are halfcovered purl embroidery threads and common ones are 150Dterylen , rayon ,spun rayon ,etc M-type Gold Flat Metallized Yarn1) 12mic ... in pre-dyed textiles(weaving), embroidery, velvet, laces, ribbons, all yarn dyed weaving and fabrics, accessories, industrial subsidiary materials, interior decoration ... -gram, or 220-gram, or 320-gram per ABS Bobbin. Metallic Yarn