Homebrew PCBs

> I have suspended my quest for a DIY solder mask until it gets warmer in my garage. I was beginning to have some success, but I ran into the problem of adhesion which I think is due UV cure intensity. UV resins cure top down and tinting the resin inhibits the cure at the substrate. I will try a metal-halide lamp when I resume my work.
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Metal halide lamps produce relatively little UV, the halide salt vapors absorb it. A clear mercury vapor lamp produces much more, while the bare quartz arc tube from one is a very powerful UV emitter, the latter will produce large amounts of ozone.