1. applications of G7 in the corrugated market
Mark R. Mazur
digital prepress consultant
(302)
Cyrel® Packaging Graphics Products

2. flexography strengths weaknesses cycle time quality perception
variable repeat
wide variety of substrates
high speed
environmentally friendly
lower total delivered cost
quality perception
lack of standards

3. G7 is all about
standardization

4. what color is this block

5. G7 will tell us the color - whether you can print that color is a different issue.

7. 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.

8. ink specifications - ISO 12647-2
the G7 standards
ink specifications - ISO
L a b c h
Cyan
Magenta
Yellow
Black
Tolerances L ± 3, a & b (± 2).

9. gray balance
gray
a b
50% C 40%M 40%Y

10. the G7 standards standardized "Neutral Print Density Curve"
G7 Neutral Print Density Curve K
2.00
CMY
1.50
Neutral Print Density
1.00
0.50 0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Target Dot Percentage

11. solid ink color, gray balance
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
G7 postulate

12. lets start with ink

13. confusion L c h just looking at cyan
ISO Gloss Coated Wood free º
ISO Matte Coated Wood free º
ISO Gloss Coated web º
ISO Uncoated White º
ISO Uncoated yellowish º
ISO Uncoated pap/Corr.board º
ISO Coated Paper º
ISO Film/Foil º
FIRST Solvent º
FIRST Water º
FIRST UV º

14. ink specifications - ISO 12647-2
the G7 standards
ink specifications - ISO
L a b c h
Cyan
Magenta
Yellow
Black
Tolerances L ± 3, a & b (± 2).

15. examples
newspaper

16. examples
corrugated

17. examples
folding carton

18. examples
labels

19. examples
wide web film

20. examples
envelope
matte
coated

21. examples
wide web film

22. same ink
anilox A
anilox B

23. gray balance
gray
a b
50% C 40%M 40%Y

24. nothing new for flexo

25. color density (C,M or Y) neutral gray density 1.40 1.20 1.00 0.80 0.60
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
neutral gray density
color density
(C,M or Y)

26. what is different
the old dot gain targets would tell you where you are
G7 - tells you where you are, where you
want to go and how to get there!
Slide #26
Once again, this is an arbitrary decision. We could just as easily turn on these 64 pixels and still represent 25% of the area. The dither pattern on the left represents a clustered dither, that on the left a non-clustered of dispersed dot dither. Now we've taken this as far as we can, or have we?

27. gray control points Dot % 40.6% 47.3% 59.5% 69.8% 88.9% Density 0.26
0.31
0.42
0.54
0.91
0.22
0.27
0.38
0.50
0.89 K
25%
30%
40%
50%
75%
C/M/Y
25/19/19 %
30/24/24 %
40/33/33 %
50/40/40 %
75/66/66 %

28. G7 Neutral Print Density Curve
the G7 standards
standardized "Neutral Print Density Curve"
G7 Neutral Print Density Curve K
2.00
CMY
1.50
Neutral Print Density
1.00
0.50 0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Target Dot Percentage

29. GRACoL 7 Neutral Print Density Graph (K)
0.50
1.00
1.50
2.00 0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Neutral Print Density
Target Dot Percentage

30. GRACoL 7 Neutral Print Density Graph (CMY)
0.00
0.50
1.00
1.50
2.00
Neutral Print Density 0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Target Dot Percentage

31. the G7 Characterization
Step 1: Print the P2P target

32. measure the P2P target

33. determine adjustments

34. adjust profile target based on P2P target and print

35. the G7 wide web test target

36. last step: varify

37. current software limitation
must go to press twice
could get all information from an IT8.7/4 then apply adjustments mathematically to profile

38. corrugated example Slide #38
Once again, this is an arbitrary decision. We could just as easily turn on these 64 pixels and still represent 25% of the area. The dither pattern on the left represents a clustered dither, that on the left a non-clustered of dispersed dot dither. Now we've taken this as far as we can, or have we?

39. let's get quantitative

40. initial standardization run

41. initial standardization run

42. initial standardization run

43. varification run
Thank you! For those of you who regularly attend FTA technical meetings you know that at last year forum I spoke about G7, at the fall prepress conference I spoke about G7 and here I am again today to talk about G7.
The reason for this single minded fervor is in part the importance of G7 to the flexo industry, but also the more I do these G7 characterizations the better I understand the process. Hopefully, what I have learned will make it easier for you when you do a characterization.

44. varification run
Thank you! For those of you who regularly attend FTA technical meetings you know that at last year forum I spoke about G7, at the fall prepress conference I spoke about G7 and here I am again today to talk about G7.
The reason for this single minded fervor is in part the importance of G7 to the flexo industry, but also the more I do these G7 characterizations the better I understand the process. Hopefully, what I have learned will make it easier for you when you do a characterization.

45. varification run
Thank you! For those of you who regularly attend FTA technical meetings you know that at last year forum I spoke about G7, at the fall prepress conference I spoke about G7 and here I am again today to talk about G7.
The reason for this single minded fervor is in part the importance of G7 to the flexo industry, but also the more I do these G7 characterizations the better I understand the process. Hopefully, what I have learned will make it easier for you when you do a characterization.

46. final varification run

47. final varification run

48. final varification run

50. let's get quantitative
how close can we make a label press match the GRACoL2006_coated1 standard
Slide #50
Once again, this is an arbitrary decision. We could just as easily turn on these 64 pixels and still represent 25% of the area. The dither pattern on the left represents a clustered dither, that on the left a non-clustered of dispersed dot dither. Now we've taken this as far as we can, or have we?

51. initial standardization run

52. initial standardization run

53. initial standardization run

54. final varification run

55. final varification run

56. final varification run

59. why flexo should embrace G7
simplify the prepress workflow
reduce costs
uniform appearance across printing industry
ease of repurposing artwork
globalization
it is what our customers - the print buyers are demanding

60. thank you
Steve Smiley
Vertis

61. Training/Testing/Research Coordinator
thank you
Li-Wen Chen
Graduate Student
Jay Sperry
Training/Testing/Research Coordinator

62. Thank you! G7 applications of in the corrugated market Mark R. Mazur
digital prepress consultant
(302)
Cyrel® Packaging Graphics Products