If you like to create mixed metal jewelry like I do, you’ll soon discover that oxidizing the pieces really give them some depth and enhance the texture. Last week I got an order for a a bangle bracelet that a customer liked, but needed made smaller, so I figured it would be a good time to write up a tutorial on how to use liver of sulpher (LOS) for oxidizing. LOS is great for creating an antiqued look on copper and silver – it works on brass too, but has a weaker affect.
Here is the original bangle, oxidized and “aged” to a beautiful warm patina, shown with the “brand spaking new” bangle I just finished. You can clearly see the difference in the finish – the oxidized bangle (top) has the detailed texture and stamping highlighted, whereas the new one I made doesn’t show the depth.
I use the solid LOS – I’ve been using it for years, and I’m pretty used to it, but you can also buy liquid form and gel form, which is easier to use, but has a shorter life span. Solid LOS comes in rocks, and the container is cloudy to protect from direct light. It is very, very, very important to keep LOS stored in a way to keep moisture from getting into the container – moisture will make LOS useless. I always tighten my container, put it in a ziplock bag, and place that into a brown bag – protecting it from light, and moisture. To use, I take a small rock, and put it into a glass bowl, then add very hot water.
Make sure not to use a metal bowl or it will contaminate the solution, and mess up the bowl too! The LOS will dissolve in the hot water, becoming a greenish yellow color. Please note – LOS is a chemical – it STINKS like sulpher (duh…), and some folks are sensitive to it. I don’t have any issues, but I try to keep it off my skin, and use a piece of copper wire as a hook to dip items into the LOS.
I just drop the bangle in, and very quickly, the bangle turns black. It only takes a few seconds (really!) to completely change the copper and silver. I always make sure that I use a copper hook, so I don’t need to fish it out with my fingers!
Once I get the coverage I want, I remove the piece and rinse it in cold water. You want to be sure that you don’t leave it in the LOS too long, because if you “over” oxidize, the black will actually solidify, and flake off. The LOS will continue to work in heat, so it is important to rinse in cold water, and dry completely.
You can really see how black it gets when you compare the bangles! It’s hard to believe, but in just 15 minutes, these bangles will look like twins! But to get there, we need to get down and dirty…
There are several different ways to remove the excess surface black. Basically, you need to gently scratch it off, to expose the surface underneath. These are the three products I used for this bangle: 3M Scotch-Bright green scrubbies (for some reson, generic scrubbies just don’t work!), a fine sanding sponge block (you can get these from the hardware store), and 3M Crocus Cloth, which I get from jewelry suppliers. First I use the green scrubbie and rub it over the surface, getting as much black off as I can. The sanding block can be a bit scratchy on the surface, so make sure to practice using this on scrap metal to get used to it. I also use the green scrubbie to get the inside cleaned up, and then I use a strip of the crocus cloth to buff it up and soften any scratches. Crocus cloth is a denim material with a fine sandpaper paint on one side. It will dissolve and make a big mess if it gets wet, so make sure your piece is dry.
And here’s the final “twin bangles” – the original is on the bottom (you can see the word “DREAM” on the inside back), and the new one is up top. It is still a little bright – it will take a few days for the copper “pink” to age and take on a beautiful warm color. I will rub a little oil onto the surface, which protects the piece a bit, and adds to the patina. Over time, the new owner will need to occasionally rub the piece clean with a green scrubbie, because the copper will continue to oxidize naturally.
I rarely make 2 items like this EXACTLY the same. I usually stamp a different phrase or texture, so this was a great chance to compare all the steps in the process with the final bangle. I hope this helped to show folks that using LOS is pretty easy, and the results are great!