Key chain, also known as keyring, key ring, key chain, key hang, etc. Key rings are made of metal, leather, plastic, rubber, wood, etc. Small and delicate, the shape of the kaleidoscope is people carry around the daily necessities. A key chain is a decorative item that hangs from a key ring.
There are many kinds of keychain shapes, such as cartoon shapes, brand shapes, simulation models and even CPU, etc., the material is generally made of copper, aluminum, rubber, plastic and so on, mainly zinc alloy surface plating nickel or rhodium and other anti-rust elements. Key rings have become a small gift.
Zinc alloy is also one of the metals with strong plasticity, and the surface is generally treated with oil drop paint or electroplating to make the product more beautiful. Surface treatment processes are: polishing, spot paint (baking paint), soft enamel, printing, oil spraying, sand blasting, electroplating.