Filigree is by gold, silver as the main raw material of yarn or with slender strips of shiny silver film. Traditional gold and silver into gold Bianjin line and the circle line two.The foil bonded to paper cut into thin strips about 0.5 mm Serve Bianjin line, then Bianjin wire wrapped in cotton or silk outer Serve round gold wire. 1940s developed synthetic film metallic yarn is made ​​of two layers of butyl acetate cellulose film clip sticky layer of aluminum foil and then cut into thin strips together. And later appeared on transition aluminum with polyester film, plus color paint and other craft made ​​of polyester metallic yarn. Polyester Metallic with two-color metallic yarn, metallic multicolored rainbow lines, fluorescent lines. Mainly used for knitted fabrics, flat knitted fabrics, sweaters, embroidery, ribbon (Happy machine), shoes, socks, arts and crafts, Christmas ornaments, hair accessories, lace, trademark, scarves, gloves, elastic bands, fancy twist yarn, denim fabrics.