Path: utzoo!utgpu!watmath!att!ucbvax!hplabs!hp-pcd!hpvcfs1!stevem
From: stevem@hpvcfs1.HP.COM (Steve Miller)
Newsgroups: comp.sys.mac
Subject: Re: HP PaintJet
Message-ID: <780031@hpvcfs1.HP.COM>
Date: 28 Jul 89 17:33:43 GMT
References: <11362@cit-vax.Caltech.Edu>
Organization: Hewlett Packard, Vancouver, WA
Lines: 19


  The PaintJet is a 180 dots per inch special paper color printer whereas the
DeskJet is a 300 dots per inch plain paper black and white printer.  The
PaintJet driver for the Mac is a generic Chooser level driver that is
compatible with the vast majority of applications.  The driver comes with
2.5X fonts since 180 DPI is exactly 2.5 times the 72 DPI screen.
  The printer has 4 ink colors (black, magenta, cyan, and yellow) and is able
to printer 7 (plus white) different colors for each pixel by using 
drop on drop printing.  The driver uses a 2x2 dither matrix to generate
hundreds of colors.  The mapping of screen colors to printer is always a
difficult job and the PaintJet drivers does an decent job of it but I think this
could be improved a bit.


Hope this answers some of your questions.

Steven Miller  stevem@hpvcfs1
Vancouver Division
Hewlett Packard