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I just use the positive photoresist these days
Quick cheap and simple.
To make the plot, i just use a bog std bubblejet to output
the trace on std white paper at 2x size
I then manually touch up bits if reqd,
then go off to OfficeWorks and get em to photocopy it onto
film at half size and high contrast.
Works perfectly, is relatively cheap and you get to keep
the film for multiple use if reqd.
Andrew
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