Press Stability and Process Control with Expanded Gamut

The Case for Objective Research
The Goal of the FQC / An Introduction to the Matt Furr Thesis
Mark Samworth
!
Ask a question that can be answered
according to the rules of statistics.!
Then answer it accordingly.!
Q
Do financial incentives for employees!
result in higher performance?!
Q
Do people have similar preferences !
For color reproduction in images? !
Reproduction
of Skin Colors
C.J. Bartleson
Eastman Kodak
1959
Preferred
Reproduction
Of Flesh,
Blue-Sky, and
Green-Grass Skin
Preferred
Reproduction
Of Green Grass,
Blue Sky, and
Caucasian Skin
Bartleson & Bray
1962
Hunt & Pitt
1974
Naturalness &
Image Quality
Chroma & Hue
Variations
of Natural Scenes
Ritter, Blommaert,
& Fedorovskaya
1996
Observer
& Cultural
Variability
Fernandez
Fairchild & Braun
RIT
2005
A!
B!
Q
Which 3 ink colors, when added to CMYK,
produce the largest gamut volume?!
!
8 Keys to Quality !
Objective Research!
1
The researcher must be unbiased or
must be able to prevent their bias from
affecting results and conclusions. !
2
A research project should be designed
to answer a single question.!
(or a small number of closely related questions)!
3
The researcher should be able to state
the purpose in very simple language!
(that would be understood by the average person !
in the specific field of study)!
Simplified Statement of Purpose
Bad Example
A determination of the the effect of common
component, alternative component, and !
grey component variation on color !
stability as quantified by Delta E!
with 4c process and !
Good Example
with 7c process!
It it easier to print !
printing.!
4c process or 7c process?!
4
The researcher must be able to state !
the purpose in a way which can be answered
according to the rules of statistics.!
Academic Statement of Purpose
Bad Example
A determination of the the effect of common
component, alternative component, and !
grey component variation on color !
stability as quantified by Delta E!
with 4c process and !
Bad Example
with 7c process!
It it easier to print !
printing.!
4c process or 7c process?!
Academic Statement of Purpose
Bad Example
A determination of the the effect of common
component, alternative component, and !
grey component variation on color !
stability as quantified by Delta E!
with 4c process and !
Good Example
with 7c process!
The Effect of Press Variation !
printing.!
on Color Stability with 4-color !
and 7-color Process Color Tint Builds!
5
A research project does not fail if it
produces a negative conclusion.!
A research project fails if it !
fails to produce a conclusion.!
6
The most important part of research !
is the design of the experiment.!
2%!
Start!
DESIGN!
94%!
EXECUTION!
4%!
Finish!
CONCLUSION!
The most important part of research !
is the design of the experiment.!
2%!
94%!
Start!
4%!
Finish!
DESIGN!
EXECUTION!
CONCLUSION!
!
Two Criteria of Experiment Design
1.  The observed difference is not random error.!
2.  The observed different is related to the test
variable and not some other variable. !
7
The ideal experiment design
produces the most information
from the least amount of work. !
8
The researcher must make a good !
Powerpoint (or Keynote) presentation! !
?
Two Most Common EG Questions 1.  What is more stable 7c Process or 4c Process?!
2.  What is more stable 7c Process or Spot Color? !
Q
What is more stable!
7c process or 4c process?!
Q
What is more stable!
7c process or Spot Color?!
What is the most stable way to
reproduce PMS 185?!
What is the most stable way to
reproduced PMS 185?!
What is the most stable way!
To reproduce modern designs?!
What is the most stable way to
reproduced a blend of PMS 185?!
What is the most stable way to reproduced a
blend of PMS 185 and 286?!
What is the most stable way to reproduced a
blend of PMS 185 and 286?!
with a drop shadow?!
What is the most stable way to reproduced a
blend of PMS 185 and 286?!
with a purple drop shadow?!
Does using the same inks,
tooling, press settings, and QC
aims result in less variation?!
Is it easier to control 7 colors!
than thousands of colors?!
The Effect of Press Variation on Color Stability
with 4-color and 7-color Process Color Tint Builds!
Matthew Furr, Graduate Student – Clemson University!
The Case for Objective Research
The Goal of the FQC / An Introduction to the Matt Furr Thesis
Mark Samworth

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