Tarnish (AKA toning) is caused by exposure to air, chemicals, and/or dirt & oils from human fingers. A chemical reaction causes oxidation of the metal and the change in color. The same thing happens to silver coins. OMG
Vinegar is an acid, so it can break stuff down really good, therefore cleaning the penny when it is dipped into the vinegar
but can you explain it more
you can do this with multiple pennies at a time, it's just that you can't just dip it in. you have to leave it in for a certain amount of time. this does work. the answer is as simple as vinegar is an acid. acid pretty much brush off all of the rust.
This caused by oxidization of the coins' surface.
US and Canadian cents, and British pennies, were once made of copper or a bronze alloy that was mostly copper. Today they're made of other metals (steel or zinc) but are plated with copper so they look the same as their older bronze / copper versions. Copper turns brown when exposed to oxygen and pollutants such as skin oils and dirt.
Because many people drop pennies on the ground and who knows what else the penny touches.
Because people drop them and put them in waterfountains and they have been used for a long time probably :)
corroding is created when iron and oxygen mix. So pennies corrode because they get oxidized too much. And they can't handle it anymore.
Damp conditions tarnish copper and bronze pennies quickly. Bleach can also tarnish them.
the oxygen in the air
It can use soap
Tarnish
Metals need to be protected against rust and tarnish because rust and tarnish eat metals.
yes, a camphor block can slow silver tarnish
yes
No.
1200 pennys
100 pennys if you save you it will be 100 dallors no pennys
100 pennys if you save you it will be 100 dallors no pennys
Tarnish
Tarnish.
Two pennys to watch from the pit, three pennys to sit, six pennys to sit, and a crown to sit. So about fifteen quid.
No, gold does not tarnish.
gold doesn't tarnish.
Copper, silver, and brass tarnish.
i think the tarnish will come of the tarnish penny
Tarnish is oxidation caused by exposure to air.
No gold does not tarnish. however, it is quite soft.