Homebrew PCBs

>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/62430331

Closeup of same area of etched board;
http://www.pbase.com/eldata/image/62430370

--- In Homebrew_PCBs@yahoogroups.com, John Popelish <jpopelish@...> 
wrote:
>