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From: neff@hpvcfs1.HP.COM (Dave Neff)
Newsgroups: comp.sys.atari.st
Subject: Re: DeskJet questions.
Message-ID: <2150003@hpvcfs1.HP.COM>
Date: 27 Apr 89 23:01:23 GMT
References: <18465@vax5.CIT.CORNELL.EDU>
Organization: Hewlett Packard, Vancouver, WA
Lines: 39

Around here in DeskJet land we use Western Paper Company's "COPYMATE
High Speed RED LABEL" copy paper both for our copy machines and our hundreds
of DeskJet family printers.  I have also seen good results on Xerographic
paper and Benchmark paper.  When I was at NCGA last week we used James River
Company "Laser Bond" paper which gave excellent quality but I assume it
is more costly than the "COPYMATE" paper.  I have also seen good results
on Copysource paper.  Be sure to print on the "right side" of the paper
if there is one.  Many copy papers have an error saying "PRINT SIDE UP"
on the edge of the paper but for the DeskJet you want this side DOWN on
the paper tray so when it is picked up the "right side" will be printed
on.

As for serial printing.  The DeskJet was not even close to being IO
limitted at 19.2 K Baud.  The DeskJet+ is totally IO bound at 19.2 K
Baud (when printing graphics of course).  Using Mode 2 compaction it is
very common to compress a page of 300 DPI graphics into 150-200K bytes.
The DeskJet+ will do a page of graphics in at best 1.25 minutes due to
the way the print head moves across the paper.  Hence it is possible
to come close to 1.25 minutes per page using 19.2 K Baud serial port.
Some things, however, like scanned images do not compress as well and
in this case time per page will increase when using the serial port.
On the DeskJet+ the parallel port must be used to get maximum graphics
performance.  In fact when the parallel port is used it really does
not matter at all if data compression is used or not on the DeskJet+.
We still want drivers to use data compression of course because it makes
a big difference when printing to the DeskJet rather than the DeskJet+
and it makes a big difference when the serial port is used.

As for color, I don't think color ink in our DeskJet pens is a priority
item.  Requiring the user to manually change pens to get multiple color
output is not really a good solution.  The DeskJet+ is for high quality
flexible text output and high speed high resolution black and white
graphics.  If you need color graphics and your text needs are not as
strong we sell the PaintJet to meet this market.  Unfortunately we do
not offer a single printer that gives both color output and high
quality highly flexible plain paper text output.

Dave Neff
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