Important: Safety Warning
This page describes practices involving highly flammable materials in ways that create a serious risk of fire or explosion.
In addition, 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.
Boiling-Out Pan
A copper or brass pan, which is also known under the name of pickle pan. It is used for boiling steel pieces in alcohol to remove shellac, and for boiling out jewelry after soldering. For the latter purpose use sulphuric acid one part, and water fifteen to twenty parts. The pan, which is shown at Fig. 40, will also be found useful for tempering small steel articles by boiling them in oil.