Youtor
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=Hiof01Bu2oU
Bluing is a passivation process in which steel is partially protected against rust using a black oxide coating. It is named after the blue-black appearance of the resulting protective finish. • In order to successfully blue your steel you need to heat it to a temperature of 300-400 degrees Celsius (bluish color) and then dip it into the vegetable oil. • #shorts
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