What is metallic yarn? What is the material of metallic yarn? What does metallic

What is metallic yarn? What is the material of metallic yarn? What does metallic yarn do? Yarn made of metallic yarn or chemical fiber thin strip film with metallic yarn luster. Traditional gold and silver wire is divided into flat gold wire and round gold wire. The gold foil is glued on the paper and cut into 0.5mm thin strips to form flat gold thread. Then the flat gold thread is wrapped outside the cotton yarn or silk thread to form round gold thread. Now some valuable traditional fabrics such as Yunjin still use the traditional metallic yarn silk. The chemical fiber film gold silver wire developed in the 1940s is made of two layers of butyl acetate cellulose film sandwiched with a layer of aluminum foil and then cut into thin strips. Later, polyester metallic yarn were made of polyester film by crossing aluminum and adding color coating. Polyester gold and silver thread has two-color metallic yarn, multicolored metallic yarn, rainbow line, fluorescent line, etc.