Homebrew PCBs

--- stuart.lamble@... wrote:
> Hi Larry
> 
> I can not seem to find any floor polish that you speak about.
> In this country, the only floor polishes that I can find are wax
> based and
> thus rather thick.

Anyone out there know what kind of plastic "Future Floor Polish"
has in it? I've been told that "Frog Juice", used for sealing
signs, is the same stuff but I don't know.

> Have you tried any permanent markers?
> I see on the PCB home page, they use a Staedtler 318 LUMOCOLOR
> pen.
> 
> How does this cope with the Ferro chloride?

I tested a few markers on a bare spot on a board I was etching in
Ferric Chloride. My ferric chloride was weak so it took quite a
while to etch, something like 45 minutes.

Stock HP plotter marker: dissolved within 30 seconds

Laundry Marker/Commercial Resist Pen: Started dissolving before
etch was done, copper partly etched away

Staedler Lumocolor 313 red marker: Flawless. Survived the entire
etch time.


=====
Steve Greenfield               // Digital photo scanning, retouching,
Polymorph Digital Photography // and photomorphing to your specs.
253/318-2473 voice           // We use the best little computer in
polymorph@...     // the world, the Amiga!
http://www.polyphoto.com/  // Based in Tacoma, WA, USA

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