The color(s) achieved by a specific patina solution depends upon the metal or alloy to which it is applied, the age and the strength of the patina mixture, the time and temperature of the exposure, and the process used to apply the solution. Cool Tools offers liver of sulfur in a stabilized gel, called Patina Gel. This product is perhaps the most widely used patina by jewelry artists for silver, copper, bronze and brass.
Jewelry Artists Guide to Liver of Sulfur
A Guide to Creating Patinas & Finishes using Liver of Sulfur