Homebrew PCBs

In general most chemical reaction rates double every 10 
degrees centigrade increase. Not sure if this applies to 
ferric chloride etching. I remember CuCl2 bubble etching 
taking some 30 to 40 minutes minuets to chew through 1 oz 
copper at 8\ufffdC.


Moore wrote:
> What temperature does Ferric chloride need to be heated too for 
> improved etch times?
> 
> Thanks,
>  Phil
> 
> 
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