Homebrew PCBs

Ok, finished downloading.

I love it!  It's great seeing people from around the world use different
techniques and material to achieve the same goal.  I nearly fell off my
chair with the pic of the PCB hanging under the neon lamp.  :D

I love your lab, it makes me realize just how badly I have to clean up my
workspace.  Ugh...

Have you considered using a spray bottle to apply the photo-purple-liquid?

I would guess that US and Canada might not have access to all those
materials.  Laws on cancerigenic (sp), toxic, radioactive  :D  material are
a bit severe here.  I wonder if equivalent materials could be acquired from
photodevelopment sources and such?  I heard of a product from Kodak that
worked wonders, but I can never remember the name.

I'm intrigued by your problem with even distribution of that
photo-purple-liquid.  At first I thought of a centrifuge like the folks in
the Yahoo Casting group use to spin casts, but that would be messy and
probably excessive force.  You just want to make sure that your liquid flows
evenly across the PCB.

Have you thought of a small press?  Sandwiching another layer over the PCB,
forcing the liquid flat.  Place a thin spacer and you have a controlled
'area' to pour in your liquid.  The same way as we make foundations for
houses over here, a vertical mold, except your would be less than 1mm wide.

If your liquid is sticky, maybe you can use wax paper in your mold, or cut
out a panel from a teflon frying pan.  Wax paper will most likely make 'wave
patterns', a hard surface like teflow is better.

Very nice results considering how you went about to get them.

Robert
:)



-----Message d'origine-----
De : Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] De
la part de hjf2k2
Envoyé : juillet 24 2005 17:18
À : Homebrew_PCBs@yahoogroups.com
Objet : [Homebrew_PCBs] Re: Experimental method


Hey everyone. I posted the pictures as promised. Here they are:
http://groups.yahoo.com/group/Homebrew_PCBs/files/PhotoEtching/

It's a RAR file with the pictures. Sadly the board came out seriously bad,
as it seems that I "underdeveloped" it, that is, didn't clean it out
properly :(, but you can see that even in that case there are pretty good
results.




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