Homebrew PCBs

>I'm quite sure I could get 8 mils, with a better printer, as I can get 12 
>reliably even with tracing paper.

Of course, it works for me also.

>I think a lot of people have problems because they have the artwork/PCB too 
>close to the UV source. The exposure might be nice and short but the 
>definition and contrast are often poor. Someone I know just can't get good 
>results. He's joked about coming over to the UK (from the US) to see how I 
>do it.

Hmmm, I have a picture online of my exposing unit which is a Scanner
housing with UV tubes built in. The picture showes the opened unit and
there you can see that the tubes are relatively close too....

http://www.myhome.ch/mzingg/pcbstuff/img_0005.jpg

Markus