Homebrew PCBs

DJ Delorie <dj@...> writes:
> Still etching, but it looks like it only gives 3 steps of useful
> range, vs 8 steps for the inkjet.  Under a microscope with
> back-lighting, the toner is not as opaque as you'd think.

Done.  Only one step was useful; the one above it was completely
etched away and the one below it had shorts.  Also, the vellum itself
took three steps of the exposure.  So, it's a bad combination of
uv-blocking paper with uv-passing toner :-(