COPPER
Copper is a reddish colored metal that can become greenish after oxidation.
Copper being one of those metals that are found in their native state, that is to say in the state of a nugget, it was quickly used for the first tools made by Man.
Copper can sometimes be used to cover watchmakers’ vices because it marks less of other metals when set in these vices. Also, copper is used with other metals in addition to gold to make an 18 karat gold alloy.
Advantages:
It is a metal that has a surface oxidation that does not go deep and has a self-protective effect, which is why it is found on the roofs of buildings. Also it transmits electricity very well.
Disadvantages:
It is a soft metal and therefore the change of color following oxidation is drastic.