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Subject: Re: [Homebrew_PCBs] overexposure

From: Cristian <crissstian@...>
Date: 2016-07-07

>
>When I was calibrating my UV box (get a transmission step wedge, they're
>cheap and you'll know you're doing it right) I found that +- about 2-3
>steps would still come out usable. That works out to a 50% to 200%
>exposure.
>
>So there's a pretty big range of "works" with a smaller sweet spot in
>the middle that you should aim for.

Thanks, dj.
That means 100% overexposure-good news for me.
I work to use a Blu Ray module with my CNC PCB milling machine (CCD2
made in Germany by Bungard).
Cristian