Homebrew PCBs

>
> It has been my experience that bubblers and other agitation methods
> are not worth the hassle. The generally make it difficult to contain
> the etchant (leaks, spray, etc...) and require more echant be used
> than is really necessary.
>
> Floating the board on the surface of hot echant is almost as
> effective as the bubbles anyway. The removed material falls away as
> it etches clearing the way for fresh etchant to be applied to the
> next layer.
>
> I would suggest a simple system of a metal pan of hot water on a
> stove or hot plate with a shallow plastic pan of echant in it. Pour
> in a little echant, just enough, then float the board and check on
> it until you can see through from the top. For double sided, do one
> side at a time and tape the side on the top.

Simple is good. Is it necessary to heat all etchants or just ferric 
chloride?
Thanks,
Dave


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