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Mark R. Mazurdigital prepress consultant
[email protected](302) 999-2534
Cyrel® Packaging Graphics Products
applications of G7 in the
corrugated market
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flexography
strengthscycle timevariable repeatwide variety of substrateshigh speedenvironmentally friendlylower total delivered cost
weaknessesquality perceptionlack of standards
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G7 is all about standardization
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what color is this block
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G7 will tell us the color - whether you can print that color is a different issue.
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ISO
FOGRA(Europe)
ANSI(North & South America)
Japan
ECI
PPA
CGATS NPES
SWOP
SNAP
IPA(IDEALLIANCE)
FTA(FIRST)
GRACoL
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the G7 standards
ink color
gray balance
neutral print density curve (NPDC)
simply put: if the inks are the same and the tone
reproduction is the same the printed result should be the same.
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the G7 standards
ink specifications - ISO 12647-2 L a b c hCyan 54 -37 -50 62 233Magenta 47 75 -6 75 355Yellow 88 -6 95 95 94Black 18 0 -1
Tolerances L ± 3, a & b (± 2).
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gray balance
gray a b50% C 40%M 40%Y 0 -2
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the G7 standardsstandardized "Neutral Print Density Curve"
G7 Neutral Print Density Curve
Target Dot Percentage
Neu
tral
Pri
nt
Den
sity
0.50
1.00
1.50
2.00
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
K
CMY
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G7 postulate
all you need is solid ink color, gray balance
and the neutral print density curves to define all
4,294,967,296 colors in a process image
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lets start with ink
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confusionjust looking at cyan
ISO 12647 Gloss Coated Wood free 54 62 233ºISO 12647 Matte Coated Wood free 54 59 236ºISO 12647 Gloss Coated web 54 56 229ºISO 12647 Uncoated White 62 45 239ºISO 12647 Uncoated yellowish 58 43 234ºISO 2846-5 Uncoated pap/Corr.board 58 50 240ºISO 2846-5 Coated Paper 54 62 234ºISO 2846-5 Film/Foil 50 49 227ºFIRST Solvent 56 62 229ºFIRST Water 59 59 230ºFIRST UV 56 59 230º
L c h
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the G7 standards
ink specifications - ISO 12647-2 L a b c hCyan 54 -37 -50 62 233Magenta 47 75 -6 75 355Yellow 88 -6 95 95 94Black 18 0 -1
Tolerances L ± 3, a & b (± 2).
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examplesnewspaper
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examplescorrugated
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examplesfolding carton
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exampleslabels
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exampleswide web film
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examplesenvelope
matte coated
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exampleswide web film
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same inkanilox A anilox B
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gray balance
gray a b50% C 40%M 40%Y 0 -2
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nothing new for flexo
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0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40
neutral gray density
colo
r de
nsity
(C
,M o
r Y
)
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what is differentthe old dot gain targets would tell you where you are
G7 - tells you where you are, where youwant to go and how to get there!
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gray control pointsK
25%
30%
40%
50%
75%
C/M/Y
25/19/19 %
30/24/24 %
40/33/33 %
50/40/40 %
75/66/66 %
Density
0.26
0.31
0.42
0.54
0.91
Density
0.22
0.27
0.38
0.50
0.89
Dot %
40.6%
47.3%
59.5%
69.8%
88.9%
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the G7 standardsstandardized "Neutral Print Density Curve"
G7 Neutral Print Density Curve
Target Dot Percentage
Neu
tral
Pri
nt
Den
sity
0.50
1.00
1.50
2.00
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
K
CMY
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GRACoL 7 Neutral Print Density Graph (K)
Target Dot Percentage
Neu
tral
Pri
nt
Den
sity
0.50
1.00
1.50
2.00
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
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0.00
0.50
1.00
1.50
2.00
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
GRACoL 7 Neutral Print Density Graph (CMY)
Target Dot Percentage
Neu
tral
Pri
nt
Den
sity
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the G7 Characterization
Step 1: Print the P2P target
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measure the P2P target
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determine adjustments
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adjust profile target based on P2P target
and print
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the G7 wide web test target
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last step: varify
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current software limitationmust go to press
twice
could get all information from an IT8.7/4 then apply adjustments
mathematically to profile
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corrugated example
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let's get quantitative
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initial standardization run
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initial standardization run
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initial standardization run
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varification run
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varification run
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varification run
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final varification run
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final varification run
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final varification run
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let's get quantitative
how close can we make a label press
match the GRACoL2006_coat
ed1 standard
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initial standardization run
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initial standardization run
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initial standardization run
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final varification run
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final varification run
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final varification run
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why flexo should embrace G7
simplify the prepress workflowreduce costsuniform appearance across printing industryease of repurposing artworkglobalizationit is what our customers - the print buyers are demanding
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thank youSteve Smiley
Vertis
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Thank you!
Mark R. Mazurdigital prepress consultant
[email protected](302) 999-2534
Cyrel® Packaging Graphics Products
applications of
G7 in the corrugated
market