Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I thought I saw it here, but can't find it- someone mentioned tests a
screenprinter had done, testing inkjet on transparency for photo
exposure. In the tests, he'd found that something like the magenta ink
was a better blocker of UV than black ink.

Does anyone recall what I'm talking about? Or am I nuts and it was on
a different list?

Thanks,
Steve