The copper layer is thicker than that. even using a small wire brush, I have never broken through the copper layer. Pure copper is more reactive...
The post 82 cents have the pure 100% copper outer layer, so I use them
The main key is the principle of diffusion. the principle that (gas) molecules are always moving ( faster at higher temperatures), and tend to...
Ah, yes, the good old days..For me, started in the 1950s and put off from the teens to the late 60s, but the good old days are right now. The...
This is a new type of digital camera from a developing company which has aspects coin photographers might find very interesting....
I know that Thad and I both have stressed the "sacrificial red cent" before, but it still escapes me why someone pays extra for intercept (tm)...
A very good point by Mike. The reason is that the zinc obv. and rev. were plated on the steel core before punching them out , so the edge is...
Yes, I read the article. But what happens in a controlled experiment is very often different in actual practice. The principle has been known for...
Zinc corrodes faster than copper, and silver the least, but the silver has to be fresh ( no tarnish, maybe a lot of dip) to work/ Back when silver...
The problem is that copper and silver has to be in an available active state. Solubility is one thing which enhances the olioodynamic activity of...
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