black silk, black wire, binding wire, braised fire wire, steel strand, iron wire tied with steel bar, tie silk 黑丝，black wire，绑丝，焖火丝，钢绞线，绑钢筋的铁丝，扎丝

Primarily used in construction, mining, chemical industry, welding mesh, welding brackets, rework, etc. After annealing, iron wire becomes softer and more flexible, making it better for using as binding wire in construction or for tying steel bars.

Currently,annealed silkThe production of steel wires is commonly done this wayTinning processWith galvanizing treatment. 1976, Guangzhougalvanized iron wireThe factory successfully tested a new technology for wire production in the country, which includes electrolytic pickling, high-pressure rinsing, and corona drying.Continuous production, enabling the wire drawing process to shift from intermittent production to continuous production, reducing labor intensity and metal consumption. By then, domestic wire factories were able to produce steel wires, spool wires,Umbrella ribsSteel wire,spring steel wireProducts such as bicycle saddle springs and steel wires. In the 1980s of the 20th century, hot-dip galvanized low-carbon steel wires for bookbinding, steel wires for fan covers, carbon structural steel wires, and bed surface steel wires also emerged successively.

The packaging for black wire is similar to that for galvanized wire: there are types with inner plastic and outer hemp, and those with inner plastic and outer weaving. Additionally, a thin layer of plastic is first wrapped around the wire, followed by wrapping it in hemp bags or woven bags!