This kind of bluing is our specialty for many years. Therefore it is in the name of our
company. For more then 400 years it has been known as a very durable method of
bluing armors, edged and fire-arms. There are ancient references to rust bluing hands
of the watches. This process consists of two stages. The first one is the contamination
of the metal surface with rusting solution, thus building a brown rust. The second part
converts this brown rust into the black oxide. This process is seldom used today except
on the high quality, rifles and shotguns. It simply does not lend itself to modern, fast
production methods. The color it produces is a soft blue – black. For durability it can’t
be beaten by any other type of bluing.
Browning is a chemical process identical to a mentioned above first stage of the rust
bluing. So, it creates a brown coat on the surface of the metal. The density and shade of
this brown coat can be adjusted to a particular needs. Therefore this process is very
useful during the restoration of the antique guns as a way of creating patina.
Historically browning was the first systematic finish applied to a military armament in
England in early 17th century. We often use this technique in our practice.
Caustic Bluing (hot bluing)
This kind of bluing was developed in early 1930th as a production way of oxidising
steels and quickly became the most popular because of comparatively low cost. In
gunsmithing it is being used mostly for pistols and rifles. This procedure is quite
dangerous for shotguns since ribs are often attached to barrels with soft solder,
consisting of tin and lead. This soft solder chemically reacts with caustic destroying
ribs attachment. Therefore we apply only rust bluing to shotgun barrels.
Sometimes called fire bluing, produces brilliant black-blue color. Often can be seen on
Colt Single Action Army screws. This finish is a great way to decorate the parts of the
gun, but it's not the most durable and not well suited for larger parts of guns receiving
a lot of handling. Technologically, this is the most Hot bluing. It takes place in salts
heated to about 700F degrees. The resulting color can be manipulated by the exposure
to a hot solution and temperature. This process can produce all shades between straw
and dark blue. Quite useful for restoring the original straw color on Luger parts.
Stainless Guns and Parts Bluing
We use Oxynate No.84 for bluing stainless parts, frames, slides and other gun