Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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To Blue Gun Barrels
Apply net; by being dissolved by dilute muriatic nitric acid and let it eat into the iron a little; and sulphuric acids, with solution of hydro- then the latter will be covered with a thin film of oxide. Clean the barrel, oil, and bursolution of hydro- then the latter will be covered with a thin gen gas, recognized by its inflammability; and nish. inflammability; and film of oxide. Clean the barrel, oil, and burthe solution exhibits the usual reactions of nish. protoxide of iron. (Cooley.) Iron does not 3264. Το Ornament Gun Barrels. A alloy easily with other metals, principally on very pretty appearance is given to gun baraccount of its high melting point. It is easily rels by treating them with dilute nitric acid and vinegar, to which has been added sulmelting point. It is easily rels by treating them with dilute nitric acid attacked by acids, and requires protection and vinegar, to which has been added sulfrom the air, to prevent oxidization or rust- phate of copper. The metallic copper is deing. 3259. To Estimate the Percentage of posited irregularly over the iron surface.
Wash, oil, and rub well with a hard brush.