> If you use my method of placing the board copper side down and let
> gravity pull the etched copper off the board (quite fast in fact), then
> you need a way of holding the board off the bottom of the tank.

PCB will float upside down. The saturated FeCl I have is quite dense.
You need only be reasonably careful. Put one edge just on the clean
etchant surface and lower the board down so that air doesn't become
trapped. If it's GRP board you can see the tracks appear under normal
lighting as the copper is etched. Phenolic is more opaque and needs
to be inspected, but this needs to be done only after a time based on
previous etching eexperience. One of these days I'll get around to
making a clear tank with back-lighting for those odd times I use phenolic.
Or even maybe just dunk a couple of protected white LEDs in there

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu