Teo Zenios wrote:
  What resolution was the inkjet printer and how far
were the lines spaced?
 All I have are 600 DPI laser printers and I might have some laser capable
 transparencies.
  
It was pretty crude - 720 DPI at most.  I would think that 600 DPI is
just fine.
The original mousepad had blue lines, so I made blue lines as well.  It
probably doesn't matter that much - just experiment.
Mike