How does the product "Tarnish Magnet" work?

Question

This is a product that does a fair job of removing tarnish from silver almost instantly. You place a flat metal "Tarnish Magnet" plate into a sink. Add their special powder and hot water and place the item you want to clean in contact with the "Tarnish Magnet". I assume some sort of electrolysis reaction is going on. What sort of metal is in the plate and what is the chemical in the powder? Really curious!

Answer 1

See these links

http://www.madsci.org/posts/archives/jun99/930201751.Ch.r.html

http://scifun.chem.wisc.edu/HOMEEXPTS/TARNISH.html