Cold water and aluminum foil by themselves would still result in untarnished silver pieces, but it could take days before you saw any results. The water temperature and the presence of salt and baking soda accelerate the cleaning process. Inspect your jewelry and repeat the process if necessary. Without sulfur, the black patina on your jewelry goes back to being silver, reversing the tarnishing process and bringing back the bling to your pieces without damaging them.Ħ. Oh, and the faint, gross smell of rotten eggs? That’s sulfur.
baka at 14:15 The original patina was probably soot from using the pot on a real fire. Though in that case, it would be a very dark gray, rather than black. The bubbles you’ll see coming out of the most tarnished crevices of your jewelry are carbon dioxide, a byproduct of this reaction. at 2:35 It may have also been a heavy layer of Aluminum Oxide, which would naturally form over time. This is all possible thanks to an electrical microcurrent between the metals, which is similar to how batteries produce electricity. In it, the sulfur in the silver sulfide on your jewelry detaches and bonds with the aluminum molecules in the foil to create aluminum sulfide.
This “friendship” means that when your tarnished jewelry touches the foil, an electrochemical reaction ensues. While sulfur bonds easily with silver, it likes aluminum better, for example. In nature, elements often bond to others to create new compounds, but some elements get along better with others. The stinkiest bubbles you’ll ever smell will leave your trinkets nice and shiny.
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