I don't know neither but after I tried to look for it. I fpound this website is so interesting.
I just want to share and I'll try it too.
What you’ll need:
1) a cup of boiling water
2) a tablespoon baking soda
3) a tablespoon white salt
4) half cup of white vinegar
5) a sheet of tinfoil, shiny side up
6) a bowl
7) Polishing cloth
What to do:
Prep itBoil the water. While it’s simmering up, line the bottom of the bowl with the tinfoil, shiny side up. I literally covered the bowl with tinfoil. Then, add the salt and baking soda to the bottom of the bowl. Add the vinegar slowly (prepare for the fizz) and mix everything together to dissolve the salt and baking soda. You want all the granules to dissolve so that they don’t scratch your pieces (always thinking…).
Go Ahead & WaitAdd the boiling water to your bowl and then gently drop each piece of silver in the bowl. Just let it sit, the chemical reaction does all the work for you. If you wish, you can flip them over (like burgers on a Q) with salad tongs, just to ensure that both sides get exposure to the tinfoil.
Spit & PolishTake each piece out carefully, being sure not to burn yourself, and buff it gently with your polishing cloth. You should start to see all the tarnish come off and all the original glory of your silver come back!
If you have charms or stones, you can try massaging good old ketchup onto the silver and rinsing it clean…I don’t think this mixture is OK for enamelled charms (although I did it on mine – I was willing to take the risk).
If you need more information you can google it or go to this website >>
http://cleanmyspace.com/the-besk-kept-silver-cleaning-secret-ever/I hope this will help. ^^
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