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Bluing, sometimes spelled as blueing, 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.
Colt Peacemaker, showing discoloration from case-hardening. Case-hardening or carburization is the process of introducing carbon to the surface of a low-carbon iron, or more commonly a low-carbon steel object, in order to harden the surface. Iron which has a carbon content greater than ~0.02% is known as steel.
United States Fire-Arms Manufacturing Company, Inc. (U.S. Fire Arms Mfg. Co., USFA) was a privately held firearms-manufacturing firm based in Hartford, Connecticut.Until 2011, United States Fire-Arms Manufacturing Company, Inc. was known for producing single action revolvers, which were clones of the Colt Single Action Army revolver. [5]
Pickling is a metal surface treatment used to remove impurities, such as stains, inorganic contaminants, and rust or scale from ferrous metals, copper, precious metals and aluminium alloys. [1] A solution called pickle liquor , which usually contains acid , is used to remove the surface impurities.
Tinplate made via hot-dipped tin plating is made by cold rolling steel or iron, pickling to remove any scale, annealing to remove any strain hardening, and then coating it with a thin layer of tin. Originally this was done by producing individual or small packs of plates, which became known as the pack mill process .
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A standard-size Colt revolver can be made into a Fitz Special by shortening the barrel to two inches or less, attaching a new front sight, shortening the ejector rod, bobbing the hammer spur, rounding the butt, and removing the front half of the trigger guard. Reshaping the hammer and the butt allows the gun to be drawn quickly with little risk ...
While detergent, Fels-Naphtha soap and vinegar and baking soda can remove a lot of stains, at some point every t-shirt is beyond saving. It’s not just stains that cause t-shirts to be tossed ...