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Subject: Re: [geda-user] Some PCB output
To: geda-user AT delorie DOT com
References: <570F22A2 DOT 9090007 AT ecosensory DOT com>
From: "Sabin Iacob (iacobs AT m0n5t3r DOT info) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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On 04/14/2016 07:54 AM, John Griessen (john AT ecosensory DOT com) [via 
geda-user AT delorie DOT com] wrote:
>
> I made a photoresist for the first time after many times doing toner 
> transfer for prototype quick test single sided SMT boards. Toner 
> transfer was always lots of scrubbing.
>
> http://ecosensory.com/geda/FET-leak-test-photoresist-1.jpg 
> <https://u2655086.ct.sendgrid.net/wf/click?upn=NM-2BB8yPXqF3SI1y9Q83nXYyiE3TdYSrEhJrTVKxujckqUnfDtwANjC2ODtSr7ESNgI9btaLNak37N7P417S42K69TUTJpDp-2F2EXpghrcVqI-3D_kTMYR7gw96EXSJsK4eeHVzkKdlAq-2BspPcYaZStVviueZPrOCy7RTE89eNP02Y-2B5Ks6YvJPYVTSKAzGcfPHmJdru7z0JE4DZZVi268sy1vysVHEbjbXv9LgW2Mnpx7FG-2FxMvGpaxZKUVHDiWUpvTfB-2Fr-2Bm1EOqWEBp1AWURa5sWgXeei6np5cMYzxF-2FYRdaKd-2BAdiNWwXDnvFhmYOlrLFWU8Ptm1VYy0QiSQ3NwlyOf4-3D>
>

you'll find out that this kind of dry film resist also makes a decent 
solder resist ;)

too bad you can get it in any colour as long as it's blue

> Scrubbing the photoresist was quick and mild compared to the tedium of 
> toner transfer decal paper or photoprint paper removal. Doing it in 
> the dark makes you think twice before committing to it though. 
> Gathering all the stuff to do this took as long as a quick turn board 
> fab job would have, but next time it will be quick, and I see that 
> coming in a few more days…and quick turn only costs $60 on sale — more 
> like $130 usually… I'll publish the new footprints for the SOT 
> packages you see here tomorrow.
>

around here we have some kitchen stove cleaner that contains NaOH and 
isopropyl alcohol + other uninteresting stuff, strips dry film in 2-3 
minutes (will also strip skin, but much slower; still, gloves are a good 
idea)