> 300dpi is all you need for eyes only, if you're human that is, imho

The HP laser printers up to ?HP2 used 300 DPI. AFAIR the HP3 introduced
"resolution enhancement technology" (RET) which cheated by smoothing lines,
adding small dots at corners etc. The results were visually far superior. At
300 dpi without such tricks there are still substantial "jaggies" and other
digital attributes. RET allowed imaging at 300 dpi but effectively added
more dpi by interpolating. I think you need to get about 600 pi to achieve
the same result straight BUT you can;'t easily be sure as RET and its
imitators are de rigeur at all dpi's these days.

        RM

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