Re: Calibration of Fuji Frontier
Re: Calibration of Fuji Frontier
- Subject: Re: Calibration of Fuji Frontier
- From: Simon Olding <email@hidden>
- Date: Tue, 24 Feb 2004 20:30:17 +1100
Thanks for the replys.
The resulting print is then fed through
the densitometer, and the software self adjusts the
exposure to meet a predetermined balance aim. If the
print is not within a certain tolerance, it asks for
the cycle to be repeated until the aim is met.
The operator has of course been using the in built densitometer, but he
did ask one question. The test print is fed to the machine, if it says
it is OK, does that mean that the strip, as is, is within tolerance or
that the print is within tolerance enough to perform an internal
calibration. In other words, does any change to the process take place
if the OK result is acheived, like fine tuning?
We thought perhaps that if you get a negative result on the test strip
then the machine does a coarse calibration to get it close to spec and
uses the second test to fine tune.
The standard
settings for the acceptable tolerance is .05 density
units. I don't know if this is absolute or plus or
minus. There is a hack to reduce this as low as .03,
but very few labs are willing to operate this way
What sort of hack are you suggesting, these guys are running this
machine in a pro lab environment and may be interested.
Thanks
Simon
On 24/02/2004, at 4:16 PM, Randy Wright wrote:
Simon Olding <email@hidden> wrote:
Has anyone had any experience with these systems and
their built in
calibration? Is the above statement true that the one
control strip
balances all the printing stocks? And has anyone any
comment about the
tolerances that fuji uses on these machines? The
operator tells me that
even though he can see a shift in the different glossy
stocks, the fuji
reps tell him it is within tolerance.<<<<<
The Frontier has a densitometer attched to the printer
unit. One paper stock is chosen as a master, and a
calibration image is internally generated, printed,
and processed. The resulting print is then fed through
the densitometer, and the software self adjusts the
exposure to meet a predetermined balance aim. If the
print is not within a certain tolerance, it asks for
the cycle to be repeated until the aim is met. All
other paper stocks are balanced with the same
procedure, but their exposures are subject to change
when the master paper is rebalanced. The standard
settings for the acceptable tolerance is .05 density
units. I don't know if this is absolute or plus or
minus. There is a hack to reduce this as low as .03,
but very few labs are willing to operate this way
because it increases the number of iterations required
to balance the machine. As a practical matter, the
Frontiers are pretty consistent. If you want to hedge
your bet a bit, gather prints of different sizes made
on different days, and average your readings together.
Unless you intend to display your work as side-by-side
comparisons with itself, you will be hard pressed to
see much day-to-day difference.
Randy Wright
Color Services
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Simon Olding
ICC Imagetec
email@hidden
(03) 6223 7882
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