Homebrew PCBs

Could be a collector of historical pennies?



--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@...> wrote:
>
> On Fri, 24 Feb 2006 17:07:36 +0100, alan00463 <alan00463@...> 
wrote:
> 
> > No need to buy a fancy cleaner.    I used to clean pennies in a
> >
> > mixture of vinegar and salt.    The proportions make little
> >
> > difference.   The solution strips off all the copper oxide almost
> >
> > instantly.    Any kind of vinegar.   Of course, you'll have to 
rinse
> >
> > the board in water right after doing this.
> >
> > Alan
> 
> 
> Ok, what i don't get here, why are you cleaning pennies? I mean, 
it  
> doesn't really matter if they are dirty when you spend them, right?
> What am i missing here?
> 
> ST
>