Post #3222838

I used an exposure time of 50 seconds using UV LEDs at a medium intensity (10 LEDs @ 100mA). I developed it for 4 minutes in a 1% NaOH solution but i think it is way too long because the design already shows up pretty clearly after a minute or so (at least, as far as i can see in almost pitch black darkness). I think it needs 1,5 minutes at most. Hopefully a shorter developing time will be more forgiving for traces that have an imperfect covering of the design.