Traditional Culture Encyclopedia - Traditional festivals - At what temperature is the blue steel needle of the watch made?
At what temperature is the blue steel needle of the watch made?
Blue steel pointer: In order to obtain better anti-corrosion and aesthetic effect, the stainless steel pointer is slowly burned to about 300 degrees Celsius, and the surface oxidation gradually turns blue. After cooling, quenching and saponification with chemical aqueous solution, a very thin light blue magnetite film with orchid luster will be produced on the metal surface. After bluing, the parts have beautiful appearance and antirust effect.
Blue steel hands are highly respected by many watch lovers, which makes people infatuated with poison, also known as "blue poison needle".
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