Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "derekhawkins" <eldata@...> wrote:
>
> >I get lots
> >of pinholes, and some holes that are bigger.
> 
> Google >3m laser transparency pcb<
> 

Screenprinters use vellum rather than transparencies. There's an ad
every month in one of the apparel magazines I get for a vellum that is
just for photoexposure use, it does not contain the optical
brighteners that most vellum contains that tends to block UV.

I'll see if I can dig up an issue. Or check screenprinters.net for
suggestions. That's also where I found the tip about using inkjet
colors other than black.

Steve Greenfield