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.
Home › Soldering And Welding › Antimonoid
Antimonoid
A welding powder, is employed for silvering the insides of hollow glass vessels, globes, convex mirrors, &c.
The glass, being well cleaned, is carefully heat, is then poured in, and the vessel turned round and round, so that the metal may be brought in contact with every part of the glass which it is desired to cover. At a certain temperature this amalgam readily adheres to glass. (See Nos. 3545, and 3614.) time past in Germany, and found to be of great efficiency. The formula for its preparation has, until lately, been kept a secret; it consists of 4 parts iron turnings, 3 parts borax, 2 parts borate of iron, and 1 of water. 3531. Fluxes for Soldering and Weld- For Iron or steel. 66 “ 66 66 " Tinned iron.
Copper and brass.
Zinc....
Lead.
Lead and tin pipes. ing.
Amalgams.
Borax or sal-ammoniac.
Resin or chloride of zinc.
Chloride of zinc. [of zinc.
Sal-ammoniac or chloride Tallow or resin. .Resin and sweet oil. 3539. To Make Zinc Amalgam for Electrical Machines. Melt 2 ounces zinc in a ladle, remove from the fire, and stir into it 5 ounces mercury previously heated. Stir till cold, and then powder it. Keep it in a tightly corked bottle.