Important: Safety Warning
This page contains a formula or preparation using substances now known to be dangerously toxic, such as arsenic, mercury, lead, or cyanide compounds. Exposure to these substances can cause severe poisoning, permanent injury, or death.
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.
Home › Bronzing › Red Bronzing for Brass
Red Bronzing for Brass
Mix 30 grains tersulphite of arsenic, 6 drachms solution of pearlash, and 1 pint water. of any solution of copper. The hydrochlorate of copper is found to answer best, and is employed as directed in the five following receipts. 3818. Directions for Using Larkin's Bronzing Fluids. In either of these methods of coloring, a solution of sal-ammoniac may be substituted for the liquid ammonia.
The quantities of each ingredient have not been stated, as these depend upon the nature of the alloy, the shade or hue desired, and the durability required. The bluish-bronze color may be superadded to the red or copper color, 3804. Olive Green Bronzing for whereby a beautiful light color is produced on Brass. Dissolve 1 pint permuriate of iron in the prominent parts of the article bronzed, or on 2 pints water. the parts from which the blackish-bronze color