[sdiy] press and peel PCB

[Tom Arnold]

On Wed, Mar 15, 2006 at 02:30:46PM -0800, jays at aracnet.com wrote:
> What do you do for your positives?

I laserprint on standard transparency film.

You cant double up films because of shadowing.  Always make sure you print a
mirror image so you can lay the toner side down on the work or light gets in
around the edge thru the plastic.  In rare cases I have had to touch up a
transparency with a marker, but even when I havent the traces have come out
fine.  If I print the transparencys at work ( nice new laser printers with
brand new cartidges ) I dont have any issues at all.  Exposure time with my
setup is about 8 minutes using standard 48" hippie/raver blacklight bulbs (
which I have about 30 of because at times I'm either... )

I'm using the chemicals and boards from MG.  Unlike Datek they were both
helpfull and knowledgable.  When I asked Datek what wavelength light was
acceptable the answer was completely incomprehensible.  Both claim to be
both dim-lightsafe and exposable under standard lighting but I was already
set up with standard BLBs.

-- 
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 - Tom Arnold       -  Free Synth DIY webspace http://www.sdiy.org 
 - SynthGeek        -
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