Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!ukma!nrl-cmf!ames!ucbcad!ucbvax!UDEL.EDU!garrett
From: garrett@UDEL.EDU (Joel Garrett)
Newsgroups: comp.laser-printers
Subject: Re: OMNI 2115
Message-ID: <700@louie.udel.EDU>
Date: Fri, 13-Nov-87 12:10:07 EST
Article-I.D.: louie.700
Posted: Fri Nov 13 12:10:07 1987
Date-Received: Sat, 28-Nov-87 08:14:47 EST
References: <8711121742.AA07834@brillig.umd.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: garrett@udel.EDU (Joel Garrett)
Organization: University of Delaware
Lines: 20
Keywords: resolution compared to Apple Laser Writer
Approved: laser-lovers@brillig.umd.edu
Summary: Write-white vs. Write-black

In article <8711121742.AA07834@brillig.umd.edu> hin@tnosel.UUCP (Hin Oey) writes:
>For about a half year we have a Texas Instruments OMNI-2115 and 
>an Apple laserwriter. Both machines are 300 dpi and are used 
>with Postscript. However, the resolution of the omni-2115 is 
>worse than the apple laserwriter, as if the omni-2115 does not use 
>the full 300dpi, but about 100 dpi.
...
>
>Hin Oey  -- IBBC-TNO  --  Netherlands  -- uucp: mcvax!tnosel!hin
>
The printer engine for the Omni-Laser uses the write-white technique, where
the printer starts out with the whole page being black and subtracting toner
to make the final printed page, while the Apple LW's engine uses write-black.
All the print engines I've seen with write-black seem to do better on printing
text and sparse graphics (mostly lines - thin ones at that) and the write-
white, which have better solid blacks (graphics with lots of filled areas)

					Joel Garrett
					University of Delaware
					arpa: garrett@udel.edu