Hero999
Banned
Of course it does, anyway I've found usiing pre-sensitised photo-resist board is by far the best solution but it's more expensive. I don't know how it compares to Press n Peel, it it works out about the sem then I'd recommend using it instead. Exposing it isn't hard, you could try daylight or a compact blacklight fluroescent lamp, but it isn't hard to build your own exposure from a wooden box and insect killer tubes.evandude said:Clearly it all comes down to personal preference, personally I am more than willing to spring for the extra 10-20 cents a board because it makes my life easier and I get faster, better, and more consistent results.
I use different methods for different boards, photo-resist seems to be more accurate so I use it purely for board containing smt ICs and for everything else there's the magazine paper method.
Your description sounds like the stuff I use. The label says sodium persulphate/sodium bisulphate. Heating it is a good idea but temperatures higher than 50C should be avoided because it will cause the solution to decompose. When mixed it smells of chlorine which is wierd since I don't think it contains chlorine but I suppose there might be similar smelling chemicals around.evandude said:ammonium persulfate is one that I have used, it's water clear when fresh and turns translucent blue (looks like windex) as it is used.