Epson Stylus Pro 7900 User Report page 5

Linearization
The linearization option is specific to media and resolution, although the user is given the option of linearizing
all resolutions in a row. To linearize, 720, 1440, and 2880 takes about 45 minutes. A single resolution takes
about 15 minutes, which is similar to the time it takes the HP to perform the same function. I like printers that
are able to re-linearize, it ensures that printer drift is held in check and provides piece of mind for high end
users. It is worth noting, however, that on their web site Epson is promoting improvements in their manufactur-
ing process that have "eliminated the need for internal calibration devices." This is intended to ensure that all
professional printers, within a given model, closely match one another. We have generally found this to be the
case, which calls into question the usefulness of linearizing using the Spectroproofer.
Chart Measurement and job verification
The Spectroproofer applications are all wizard driven and nicely organized. For measurement jobs the software
presents several standard profiling chart options, as well as allowing custom charts to be select. Once the
chart is selected and printed, it is automatically measured and saved as a CGATS compatible measurement
file. What should be clearly stated here is that while the measurement file contains all the information needed
to create an ICC profile, the profiling software required to process that file is not included. The assumption
behind this is that most people purchasing the SpectroProofer will already own a 3rd party profiling package or
have a RIP with profile creation options. I'm not totally on board with this reasoning. While most RIP's provide
the option of building profiles it is often an additional feature that can easily cost over a $1000.
The SpectroProofer also has a nice system for job verification, and will be useful for the proofing market. The
wizard driven process is simple, allowing a selected chart to be measured in conjunction with a proofing job.
When printed, the bar is then measured by the SpectroProofer. The measured results are then compared to
the target values and the Delta-E is calculated. Tolerances can be set inside the software and a Pass or No
Pass is then printed below the color bar.
The Spectroproofer is also designed to integrate with 3rd party RIP solutions. In this capacity it can perform the
measurements needed to perform printer linearizations, and with the proper support, ICC profile creation. Most
of the RIP vendors I talked to were planning on supporting the Spectroproofer.
For the most part I like the SpectroProofer. It appears well-built and integrates nicely into the printer. In addition
to its measurement functions, it also includes a fan to speed up the drying time of prints, as well as tempera-
ture monitor. It does have limitations that may limit its appeal in some markets. For one it's not cheap. At $1500
for the 24" model it's around the same price as an Eye-One Photo package. However the 44" is an additional
$1000, creating a $2500 accessory, which is almost half the cost of the printer. And for $2500 bucks I would
expect the unit to ship with profiling software, even something basic. The fact that measurements are done in-
line is nice, but the speed of the unit is somewhat slow. The linearization option seems logical but if the printer
is so stable, do I really need to linearize? In conclusion, I don't think it is a great fit for the photo market, and to
be fair it hasn't been marked towards this group. Where the SpectroProofer will likely find acceptance is in the
high-end proofing market.
Operating Cost
Ink Wastage/Nozzle Clogs
I know that ink costs get the most attention when factoring the cost per print, but there are other factors that
should also be considered. In the past Epson printers have been fairly loose about ink wastage. The main reason
behind this was the reliance on aggressive ink purges to maintain the print heads. This was especially true in the
early generation of printers, where nozzle clogs happened often. The X900 benefits from numerous improve-
ments to the print heads that help to reduce, although not completely eliminate clogged nozzles.