Mark R. Mazur digital prepress consultant mark.r.mazur@usa.dupont.com (302) 999-2534 Cyrel ®...

Mark R. Mazurdigital prepress consultant

mark.r.mazur@usa.dupont.com(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

Jay Sperryjsperry@clemson.edu

Training/Testing/Research Coordinator

Li-Wen Chenliwenc@clemson.edu

Graduate Student

thank you

Thank you!

Mark R. Mazurdigital prepress consultant

mark.r.mazur@usa.dupont.com(302) 999-2534

Cyrel® Packaging Graphics Products

applications of

G7 in the corrugated

market