Homebrew PCBs

I wonder if a paint sprayer would work?  Problems to solve:

 

- The paint sprayer plumbing and nozzle would have to withstand the
etchant.

 

- Air compressors generally produce some oil mist.  That would have to
be filtered out to avoid contaminating the etchant.  A section of pipe
in the air line filled with cotton ought to work.

 

. . . . 

 

I have seen a couple shops in universities that etch boards using
several gentle streams of etchant flowing onto the PCB.  The streams are
shifted left and right, while the board is raised and lowered.  Do these
not work well with fine geometry artwork?

 

Cheers,

- Jan

 



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