Re: HP 10ps buying info
Re: HP 10ps buying info
- Subject: Re: HP 10ps buying info
- From: email@hidden
- Date: Thu, 22 May 2003 09:30:58 EDT
In a message dated 5/22/03 8:39:32 AM, email@hidden writes:
>
> Isn't it stetching it a bit to compare the liniarization sensor in an HP
>
to a
>
> "calibration device" in the larger sense of a custom profiling system?
>
>
Sorry I don't understand.
>
My experience with HP onboard sensors is that they read densities for
adjusting 2d channel curves for HP's own ink on HPs supported papers. I consider this
a good way to keep such devices consistant under a profile (be that a canned
profile or a custom one), but only as long as the system uses those predefined
components, and the components are consistant. But if you stray outside those
parameters, then such a system is no longer sufficient.
Put in a third party longer life ink (which anyone but a prepress user would
need to do since the OEM inks are extremely fugitive) and the magenta may be a
bit more rhodomine, which the sensor can neither detect, nor correct for...
time for a real color reader and profiler. Similarly, if a media is used which
prints neutrals warmer or cooler than the canned choices, than your prints
will reflect this, as there is no correction in this area either.
So my comment was that (while such a system is an efficient way to avoid
color management, in the larger sense, by using some simplifying assumptions, and
sticking to the elements that make those assumptions reasonably accurate) its
important not to confuse this shortcut with more advanced solutions, or users
will start to expect results from it that it is not designed to produce.
C. David Tobie
Design Cooperative
email@hidden
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