Does anyone etch boards with a simple immersion dip in agitated solution
? I realize spray etching is the norm, but I was hoping to get some info
on immersion etching and avoid some of the problems of relatively
complex spray equipment. (since etching rate is not a prime concern for
us). After some experimentation I found agitation with large amounts of
fine bubbles works the best. About 80 L/min (3 cfm) of air evenly
distributed over a tank bottom area of 500x300mm (20"x12"). Porous
rubber hose seems to produce finer bubbles and better distribution than
a few holes drilled into a length of PVC piping. I'd be interested
learning more about what is out there in the world of etching.

regards,

Adam Seychell

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