first understand that DPI (the way printers/scanners are "measured") and PPI
(Pixels per inch) ARE NOT the same thing.
For good quality resolution when printing.... you need at least 250-300
PPI. Otherwise the image will look very "pixely". You can change the PPI
setting in a graphics editor (such as Microsoft Photo Editor, PaintshopPro
or Photoshop). When you change the PPI -- the image size will also change
(an increase in PPI will make the image smaller -- think graph paper and the
size of the squares --- 4 squares to the inch vs 22 squares per inch - a
fixed number of pixels -- it is the size of the space you fit them into that
changes.) Try to draw a circle on both of those graph papers -- On the 4
squares / inch you will have a very jagged edge to your circle and with the
22 squares / inch it will appear much smoother.
And remember, regardless of the quality of printer (600 dpi or 2400 dpi) if
the image has a very LOW PIXELS PER INCH (PPI) setting -- the image WILL NOT
be clear.
I hope this helps.
Kate in MN