Homebrew PCBs

How thick is the thinnest line that can be generated by a lasejet (say the
HP1200) and an injket?

When doing photographic etching, is the thickness of the line from the
printer the same as the eventual trace on the foil pattern?  If the line
was, asay 0.5MM thick, would the trace be the same size as well?

I have found that the lines created by a Laserjet seem to be more "crisp"
than even a good Inkjet.  Even if the Injket has from 1200 to 2400 DPI, a
LaserJet appears slightly clearer.  Does this quality difference affect
the quality of a foil pattern?

Thanks,
Charles