>If you want the ultimate in etching, you need to collimate that
>process.
Diminshed returns in a homebrew scenario. I have tried "float
etching" with Ferric Chloride (FC) and yes it's possible that it
more faithfully reproduces the original than normal etching. FC in
general seems to do a better job than the Persulphates (PER) in
terms of fidelity but that's just another reason why I prefer them
over FC. Below are extreme (the best my macro lens could do)
closeups of two of the 6/6 images that demonstrate that what you see
may not be what you want to get. The edges from inkjet printers are
far from smooth and I purposely overexpose inkjet artwork and etch
with PER in order to even things out. The etched board may have lost
a fraction of a thou along the way but the edges are much smoother
when compared to the original artwork. Lens to subject distance was
the same in both cases.
Closeup of original artwork;
http://www.pbase.com/eldata/image/62430331Closeup of same area of etched board;
http://www.pbase.com/eldata/image/62430370--- In
Homebrew_PCBs@yahoogroups.com, John Popelish <jpopelish@...>
wrote:
>