From: utzoo!decvax!cca!Kosower@PARC-MAXC@sri-unix
Newsgroups: net.works
Title: Display Resolution
Article-I.D.: sri-unix.2453
Posted: Wed Aug  4 21:21:42 1982
Received: Thu Aug  5 06:26:32 1982

  1400 lpi seems to be the point at which further increases in
resolution are nearly impossible to detect (even for experts).
Several photocomposers (Autologic, Compugraphic, and Mergenthaler)
generate ~1400 lpi output.  Although 1000 lpi might possibly be
adequate for some applications, 1400 is probably the only adequate
resolution for truly high-quality publications (e.g. books).  200 lpi
(as mentioned by Bern Niamir) is completely inadequate, as anyone who
has ever looked at XGP output will readily admit.  Furthermore, while
increasing the number of gray-scales improves the effective resolution
for bit graphics (e.g. photos), it does little good where sharp
outlines are required, as in typeset material or symbolic graphics.
Making the outlines fuzzy is hardly a substitute for increasing the
resolution.

							David.