Homebrew PCBs

--- JanRwl@... wrote:
> In a message dated 10/18/2002 8:04:13 AM Central Standard Time, 
> stuart.lamble@... writes:
> 
> 
> > Then place on a table with a very simple motor assy. 
> > The motor assy needs to rock the table like a see-saw.
> > To gently move the tank as if on a see-saw, this allows the
> board to be
> > submerged, then aired , then submerged etc.
> > 
> > Simple yet very effective, even without heating the ferric
 
> 
> Stuart:  This has NOTHING to do with the "air"!  This motion only
> allows the 
> dissolved copper salts to "swish off" so fresh FeCl can "get AT"
> fresh 
> copper, again!

Yep, biggest problem I've had with etching in a flat pan is that no
matter what you use or how hot you get it, etched copper and used
acid builds up in a layer and slows the etching process. Minor
swishing back and forth just means that the edges etch but not the
center.

So no matter what I use, I want to use a vertical tank, probably
with a bubbler to keep it moving.

Steve Greenfield

PS I love this list!


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