RE: HP's New Printers
RE: HP's New Printers
- Subject: RE: HP's New Printers
- From: "Julian Mussi" <email@hidden>
- Date: Fri, 19 Jan 2007 19:37:02 -0800
- Thread-topic: HP's New Printers
Hello,
I've been testing our demo Z3100 for the last couple weeks. When
we received the printer it was loaded with the older 4.0.0.4 firmware
and a copy of the APS. In that incarnation I noticed that the printer's
gamut was very limited in the shadows compared to our Epson 7800,. While
the Epson displayed a very rounded shadow gamut (bowl-like), the HP
tapered down sharply (cone-like). We also noticed some sharp breaks
especially on matte paper. The most recent firmware upgrade (4.0.0.6)
virtually eliminated all of these issues. This indicates to me that it's
still an evolving and improving product. I rebuilt profiles using the
APS and was quite pleased to see how the gamut shape improved,
especially in shadow detail. The Epson and HP are different, they both
diverge into different shapes as the L* value declines, although now the
HP displays a much larger shadow gamut than before.
In regards to the onboard spectro, I think that it is a solid
device and have no reason at this point to mistrust the accuracy of its
measurements. As you pointed out, the APS is a work in progress and it
may be presumptuous to make any judgments. What is obvious at this time
is that the profiling software is a limiting point in the utilization of
the spectro. I compared two profiles, one built from the APS and the
other from Monaco Profiler using a DTP-70, and in Colorthink you would
not be able to discern any differences in the gamut plots. However the
prints they yielded displayed some noticeable differences, with the
Monaco profile showing smoother transitions and better shadow detail. I
fully expect that APS results will improve as the software evolves. An
interesting feature of the APS is the ability to export measured data as
a text file to be imported into a 3rd party profiling package. I'm
currently testing this option. This not only allows for more flexibility
in profile creation, but if the patches were printed on another printer
they could be read on the HP and you could create a profile using your
existing profiling package.
Thanks,
Julian Mussi
Spectraflow, LLC.
415-235-7684 cell
-----Original Message-----
From: colorsync-users-bounces+julian=email@hidden
[mailto:colorsync-users-bounces+julian=email@hidden]
On Behalf Of neil_snape
Sent: Thursday, January 18, 2007 10:24 AM
To: colorsync user list
Subject: Re: HP's New Printers
on 18/01/07 17:38, Armand Rosenberg wrote :
> For the "typical" photographer (whatever that means) who makes his own
> prints, how does the built-in profiling solution on the new HP's
> compare to making custom profiles using Eye-One Match with Eye-One Pro
> spectro? Are the results (print quality) comparable?
>
> For my own purposes, I'm not so much interested in the comparison to
> higher-end profiling packages, for obvious reasons.
>
> BTW, do the gloss optimizer settings affect the profile, ie does one
> need a different profile for each setting (on a given paper)??
The profiles are right for an average user expectation. It depends on
the chart printed if your going to seek more accurate or pleasing
profiles from charts that have more patches.
In the end I think it's more about the smarts that go into the
profiling application rather than the sheer volume of patch samples and
their resolution.
The GE definitely does change the over all appearance and when making
the profile should be applied or not to reflect the changes . The
onboard profiler makes assumptions about the GE and does save an assumed
GE condition as well. I find it's best just to make a measured profile
for both GE on and off rather than use the assumed profiles.
Since the APS is a PMP lite sort of version and the internal profiler a
quite easy to use quicker version with less gamut optimisation going on
I would highly recommend the APS for it's better chart and profiler
combination. Yet the APS is still in works, and any comparison at this
point will change. They are tweaking it to make it perform with the
onboard spectro which is making it a different package than the
Gretag/Xrite solutions off the shelf. A lot of the math remains close to
the same for gamut mapping but the editor and other parts are unique to
HP.
Since using APS for Photo media I no longer make i1 and PMP profiles
other than for comparisons and matte media.
Yesterday I printed 100' and the screen to print match was without fail
on all images. The B&W mixed in with colour images shows us new tricks
in using a separation of channels where if the r=g=b is equal the prints
are printed in grey inks only. This is a huge advantage when batching
prints.
Neil Snape email@hidden http://www.neilsnape.com
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