I tried around with it most of the day.
The ink doesn't seem to resist fully and properly.
I even tried FeCl, but the stain in a bottle shows even more
damage/under-etching than CuCl.
(BTW: many year old FeCl already mixed in a PET bottle is still good, and
i discovered the vacuum sealed PE bags of FeCl powder/granules have let
through enough water to wet it slightly. that stuff must be hygroscopic
like crazy.)
I've started a wiki here which gives me lotsa easy-upload space for pics
(200Mb)
<
http://dipcb.schtuff.com/?action=gallery&q=pcb>
I hope you have permisson to view as-is, let me know if not.
Basically the etchant etches through and i do not know why.
Anyway, i'd thought i throw that at you guys for ideas.
Volkan, is there a way to measure at which temperature and how long you
cure?
ST