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Date:	Thu, 3 Apr 2014 10:04:02 +0100
From:	Richard Bown <richard AT g8jvm DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] printing from PCB
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On Wed, 2 Apr 2014 13:26:34 -0400
DJ Delorie <dj AT delorie DOT com> wrote:

> 
> If you're doing UV photoetching, here's what I suggest:
> 
> Export your layers as PNGs at whatever your printer's maximum square
> physical resolution is.  Postscript leaves too much to the interpreter
> (for example, ghostscript and HP give different results), the PNG
> exporter has been hand-tweaked to give exact coverage for just this
> purpose.  This step can be automated via makefiles or scripts.
> 
> Figure out how to control your printer better than your printer
> driver.  I wrote my own software for the Epson series so that I could
> control drop size and placement myself, to get clean edges without
> smearing.
> 
> Print on Jetstar Premium UV film with the highest ink density your
> printer can handle.  I've tried a lot of films and none do it right
> except this one.
> 
> Get a Stouffer 21-step transmission wedge and calibrate your exposure.
> Most films require a hold at 8.

Hi
thanks

BTW what is a  Stouffer 21-step transmission wedge  ?

-- 
-- 
Best wishes /73
Richard Bown
Email : richard AT g8jvm DOT com   
HTTP  :  http://www.g8jvm.com
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