Both UV and blacklight tubes are wrong. Use Philips colour 05 or Osram
colour 70. Tubes at 3 cm, 1 min exposure and you get a perfect PCB.

Use cupric chloride/hydrogen peroxide/hydrochloric acid as etchant. Clean,
stable, infinite life, cause you can regenerate it time after time.

Leo van Loon
SBB simpeltronics
Netherlands
tel +31 (0481) 450034
fax+31 (0481) 450051
mail sbb.simpeltron@tip.nl
url http://www.sbb-simpeltronics.nl
SBB simpeltronics ontwikkelt technische projecten voor basisschool en
basisvorming.
SBB simpeltronics develops technical projects for children in primary and
secondary education.



> -----Oorspronkelijk bericht-----
> Van:  pic microcontroller discussion list  namens Benjamin Petersen
> Verzonden:    dinsdag 27 april 1999 10:26
> Aan:  'pic microcontroller discussion list'
> Onderwerp:    RE: [OT] PCB exposure unit
>
>
.
> Anyways, does anyone see any reason why I COULDN't rebuild my
> current box
> into a combinatoin exposure system?
>
> I had an UV eraser, and even if PCB was exposed only for 30
> sec, it was to much·.So I use BlackLight.
>
> Regards
> Benjamin Petersen