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Digital BW, The Print

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Brian and David was Re: [Digital BW] Profiling with Dedicated B&W Inks

2008-12-12 by Jon Cone

Brian and David,

Its still not clear to me that the Spyder is going to automate
anything for Brian when he tries to profile a dedicated b&w ink. It
seems like if he already knows how to profile a dedicated b&w ink, he
can substitute the measuring device he was using (an Eye1 for example)
with a Spyder. Unless I am mistaken, all the Spyder is going to do is
measure. It does not have any application to make curves, or linearize
curves.

So here is another idea that might get the three of us into a new
quick project that will allow Brian to measure a 256 patch grayscale
target, email me the data, and I will email him back a K7 profile.
Brian would need of course to print the target through QTR and a
Piezography K7 "master curve" which I would send him. David will need
to dimension out the target so the Spyder can read it, and a way for
Brian to save the measured L values into a text file or spread sheet
to send me. 

My Piezography Profiler will make a perfect linearization from the
data - if the data is spot on - this should be a no brainer approach.
 K7 profiles have seven 256 point curves, and I believe Brian will be
hard pressed to try that on his own with QTR curve creator tools. If
we plan a time to do this, I can convert measured data into a curve
set in moments and return for Brian to comment on the results. We can
also confirm a linearization with the same target through the custom
profile.

Normally, I charge $99 for a custom K7 profile that we measure from
our supplied target. But this project might lead to David selling a
few more Spyders and InkjetMall making lower cost custom profiles for
Spyder owners who use K7 inks. There are a ton of K7 users but very
few own a Spyder. We do not even sell the Spyder at InkjetMall.

it would look something like this

1) Jon emails Brian a 2200 Master Curve
2) Brian install the curve into QTR
3) David creates a 256 patch grayscale target (0-255) that is
dimensionally correct for the spyder.
4) Brian prints the target through the master curve.
5) David figures out a way for Brian to send Jon a CSV or Excel spread
of the 256 measurements with only the L values.
6) Brian measures the printed target with the Spyder, and emails Jon
the data.
7) Jon plugs the data into the Piezography Profiler and produce a set
of seven curves each with 256 data points that form a perfect
linearization for Brian's printer, and emails it back to Brian to
install in QTR.
8) Brian reprints the 256 patch target through the custom profile,
measures the data and sends to Jon for confirmation.
9) Jon plugs data into Piezography Profiler to confirm its linear.
10) Brian prints his photos with confidence.


No charge on this end for these experiments if David will give it a go.

If it works, and I do not see why it would not, anyone with a Spyder
could print and measure a target and email the data back to me, and
get a custom profile back in moments.


regards,

Jon Cone

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