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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
flexography
strengthscycle timevariable repeatwide variety of substrateshigh speedenvironmentally friendlylower total delivered cost
weaknessesquality perceptionlack of standards
G7 is all about standardization
what color is this block
G7 will tell us the color - whether you can print that color is a different issue.
ISO
FOGRA(Europe)
ANSI(North & South America)
Japan
ECI
PPA
CGATS NPES
SWOP
SNAP
IPA(IDEALLIANCE)
FTA(FIRST)
GRACoL
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.
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).
gray balance
gray a b50% C 40%M 40%Y 0 -2
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
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
lets start with ink
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
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).
examplesnewspaper
examplescorrugated
examplesfolding carton
exampleslabels
exampleswide web film
examplesenvelope
matte coated
exampleswide web film
same inkanilox A anilox B
gray balance
gray a b50% C 40%M 40%Y 0 -2
nothing new for flexo
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
)
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!
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%
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
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%
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
the G7 Characterization
Step 1: Print the P2P target
measure the P2P target
determine adjustments
adjust profile target based on P2P target
and print
the G7 wide web test target
last step: varify
current software limitationmust go to press
twice
could get all information from an IT8.7/4 then apply adjustments
mathematically to profile
corrugated example
let's get quantitative
initial standardization run
initial standardization run
initial standardization run
varification run
varification run
varification run
final varification run
final varification run
final varification run
let's get quantitative
how close can we make a label press
match the GRACoL2006_coat
ed1 standard
initial standardization run
initial standardization run
initial standardization run
final varification run
final varification run
final varification run
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
thank youSteve Smiley
Vertis
Thank you!
Mark R. Mazurdigital prepress consultant
[email protected](302) 999-2534
Cyrel® Packaging Graphics Products
applications of
G7 in the corrugated
market
