Philip Pemberton <ygroups@...> writes: > (using Thinktink's numbers as an example) Dry film requires 42.5 mJ/cm^2 ThinkTink's film requires 150-300 mJ/cm2 > Double that = 1307.58 seconds exposure That's 21 minutes. Sounds about right for an initial step gauge test. I'd use 16 just to make the math easier ;-)
Message
Re: [Homebrew_PCBs] Setting exposure with a step gauge
2009-06-02 by DJ Delorie