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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 |
Message-ID: | <20140403100402.53feb6b6@richard-laptop> |
In-Reply-To: | <201404021726.s32HQYBe009236@envy.delorie.com> |
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<201404021726 DOT s32HQYBe009236 AT envy DOT delorie DOT com> | |
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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 nil carborundum a illegitemis ################################################################################## Ham Call G8JVM . OS Linux Mint 16 x86_64 on a Dell Inspiron N5030 laptop Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 400W, 70cms 200W Microwave 23 cms 140W, 13 cms 100W, 6 cms 0W & 3cms 5W ##################################################################################
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