Turning Silver and Copper Metals Black: Some Oxidizing Techniques

Warren Feld
10 min readApr 18, 2020

(Use bare wire, if you intend to oxidize it; this means it has no protective lacquer finish on it to prevent it from tarnishing)

Liver of Sulfur solid form


Step 1 Preferably work outside when using Liver of Sulfur (LOS). Make sure you wear gloves and designate glass or ceramic containers that will be used solely for this purpose.

Step 2 Clean the silver before you begin. Any polishing residues, wax or fingerprints could affect the consistency of the oxidation. Hot soapy water and an old toothbrush work well.

Step 3 Make a neutralizing bath. You will use this later to neutralize the silver once you have finished oxidizing.

Step 4 To make the neutralizing bath: Using one Mason jar, mix two teaspoons of baking soda in one cup of cold water.

Step 5 Stir solution until the baking soda is dissolved. Set aside for later.

Step 6 Prepare your workstation. You need two mason jars with one cup of hot water in the LOS solution, the neutralizing bath you just made, Liver of Sulfur, the silver you wish to oxidize, a pair of gloves, a plastic spoon and some paper towels. (Hot water (not boiling): 30 seconds in microwave) (Use glass jars, not plastic)



Warren Feld

Beading and jewelry making have been wonderful adventures, from custom work, production work, and teaching. *Design is about the ability to make smart choices.