Homebrew PCBs

I recently stumbled across this page when looking for something else: 
"Ecoresist" from Camnitzer
<http://www.studio-camnitzer.com/ecoresist_ann.htm>  .
The last paragraph tells where to get some to work with.  If it's truly
comparable to the Kodak Photoresist (KPR) I recall working with many
incarnations ago (early 1970's) it only takes a couple of drops to
sensitize a typical PCB, so 1/2 pint should keep a typical hobbyist
going for a year or two.

--- In Homebrew_PCBs@yahoogroups.com, "Tony Harris" <kg4wfx@...> wrote:
>
> Hi all,
>
> I've been doing the toner transfer, or the presensitized boards, or
using the marker method to create boards.  I'm looking to experiment at
trying something new but...
>
> This may seem like an odd question, but what coatings can be used as
an etch resist?  Basically, I'm looking for something I can coat the
board with  and remove where I want to etch.  Preferrably something that
can be removed easily with the right "stuff" (whether it be chemical or
mechanical) but not by the etchant.
>
> I have an experiment I would like to try, but I really don't know what
to use to coat the boards with to attempt my experiment.
>
> Thanks in advance!!
>
> -Tony



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