Homebrew PCBs

> I know that placing metal in a microwave can produce "interesting" 
results.
> However is there any experience with a piece of copper in a cup of 
water?
> I'm speculating that the water may keep the copper from being the 
primary
> load on the microwave and also provide a cooling surface for the 
copper.
> 
> Just interested in heating a persulfate etching solution.
> 
> tnx
> jtm
I prefer to heat my solution and then etch. It seems to keep warm 
enough to etch a board. The etchent can also eat your microwave metal 
parts. I am thinking a fishtank heater would do the same. Just takes 
longer to heat.

Brian