Re: Update on HP 10/20PS printers
Re: Update on HP 10/20PS printers
- Subject: Re: Update on HP 10/20PS printers
- From: Johan Lammens <email@hidden>
- Date: Fri, 30 Nov 2001 18:05:35 +0100
- Organization: Hewlett-Packard
email@hidden wrote:
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Subject: Re: Update on HP 10/20PS printers
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Date: Fri, 30 Nov 2001 22:28:23 +1100
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From: Darrin Southern <email@hidden>
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To: "colorsync users lists.apple.com" <email@hidden>
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From what I have seen (in the short time I had to play with the 20PS) the
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'charts' used by the rip for the printer were for linerisation only, which
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were applied on top of the rips own colour management.
yes; you can think of the built-in sensor as a densitometer which is used to linearize each of the
six colorants separately; linearization gets applied after color conversion, i.e. "underneath"
color management, so to speak. All built-in profiles have been built on top of the linearized
printer state, i.e. after linearizing.
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There was no method of running the supplied rip with the rip's own colour
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management turned off, and therefore no way of building a custom icc profile
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for the paper and ink combination, and then applying it to the rip.
yes there is: Setup > Default Settings > Print > uncheck "Perform color correction", then also
uncheck "Automatic black replacement". That way the rip only applies 4->6 separation
(CMYK->CMYKcm), ink limiting, and linearization (if previously calibrated). You then build a
custom CMYK profile as usual; the default recommendation is to not use ink limiting in the profile
(i.e. TAC 400%).
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When the printer is used with the BEST rip (Windows version), a custom
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baseline (re: linerisation) can be created, and then a custom icc profile
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can be built to define the the colour space of the 'linerised' printer.
this is exactly the way things work with the 10/20ps rip, as described above.
Johan