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- Path: sparky!uunet!pipex!doc.ic.ac.uk!warwick!warwick!not-for-mail
- From: maupb@csv.warwick.ac.uk (Mr J L Saunders)
- Newsgroups: comp.sys.acorn.tech
- Subject: Re: High res Colour Printing in RISCOS 3.1
- Date: 17 Dec 1992 16:14:21 -0000
- Organization: Computing Services, University of Warwick, UK
- Lines: 43
- Message-ID: <1gq90tINNco0@violet.csv.warwick.ac.uk>
- References: <ARM200-921216134020-1454F42C*@MHS>
- NNTP-Posting-Host: violet.csv.warwick.ac.uk
-
- In article <ARM200-921216134020-1454F42C*@MHS> /G=Owen/S=Smith/O=SJ-Research/ADMD=INTERSPAN/C=GB/@mhs-relay.ac.uk writes:
- %The entry for the Epson.JX-80 says:
- %
- %"The "Epson.JX-80" printer definition file is the same as the "Epson.FX-80"
- %file, except that it uses colour for non interlaced graphics printouts ie.
- %120 by 72 DPI or lower. There are two reasons for this. Firstly, interlaced
- %colour printing would involve an excessively large number of print head
- %passes (8, 12, 16 or 24) over the same line on the paper. Secondly, on the
- %second or subsequent interlace passes, the light ribbon colours (eg. yellow)
- %would be printing on top of dark colours already on the paper. This causes
- %contamination of the lighter ribbon colour and seriously reduces usable
- %ribbon life - unless you are happy with muddy yellows."
- %
- %This explains why I didn't put colour interlaced resolutions in. In a school
- %environment (and many others), it just isn't appropriate as it takes forever
- %and destroys the ribbon in no time at all (and schools can't afford to waste
- %consumables like that). Kids being kids, it is very likely that left to
- %their own devices they'll select what appears to them to be the best
- %resolution ie. the highest.
- %
- %As to what you can do about it, all you need to do is play around with
- %!PrintEdit for 10 minutes. I did actually try 360 by 360 colour on a Star
- %LC24-200, starting with a brand new ribbon. It took FOREVER to print (16
- %head passes per line) and the paper was a soggy mess afterwards. The 180 by
- %180 printout of the same picture actually looked better. (There was a review
- %of colour dot matrix printers in Acorn User about 18 months to 2 years ago
- %that said the same thing ie. 180 by 180 looked better than 360 by 360.) On
- %top of this, when I tried it the ribbon needed changing after just one page
- %of 360 by 360 - the yellow just wasn't yellow anymore after over-printing so
- %much on darker colours. I stand by my decision not to make interlaced colour
- %resolutions available in the supplied printer definition files. If you want
- %to add it yourself, go ahead. !PrintEdit is all you need.
- %
- %Owen.
-
- Why not just print the yellow first? This seems obvious to me.
-
- Jason
- --
- "Merry Xvob!" Jason L Saunders [ RouE ] "Merry Xvob!"
- email: maupb@csv.warwick.ac.uk
- snail: Warwick Business School, University of Warwick, Coventry CV4 7AL, UK
-
-