Advanced color management Understanding color conversions and settings

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1 Advanced color management Understanding color conversions and settings Lou Prestia Sr. Product Line Manager Heather Blakley Product Marketing Specialist

2 Agenda ICC color management basics Profile selection and embedded profiles PDF/X output intent Rendering intents Black point compensation Problems printing with black Color management failures Recommended DFE settings 2

3 Be sure to watch our previous webinars on color 3 Key steps to get the right color the first try The ABCs of producing the best match for spot colors Best practices for matching industry color standards 3

4 ICC color management basics 4

5 ICC color processing workflow 5

6 How to access the expert color settings on your Fiery DFE 6

7 Introducing the new Fiery Color Flow Chart 7

8 Profile selection and embedded profiles 8

9 Embedded ICC profiles Modern design applications favor the use of a working space Standard RGB or CMYK defined by ICC profile All files created are in a working space When saving from these applications, best practice is to embed profiles 9

10 Working spaces in Adobe Photoshop Photoshop requires the definition of a working space for CMYK and one for RGB Photoshop does not force all windows to be in one of the working spaces 10

11 Photoshop color working space 11

12 Profile mismatch Photoshop provides warnings when opening and pasting about profile mismatches 12

13 Embed profile when saving 13

14 Show assigned profile in Photoshop 14

15 Working spaces in Adobe Illustrator Uses working spaces Illustrator offers a unique profile mismatch option: Preserve numbers Causes Illustrator to ignore embedded profiles 15

16 Adobe Illustrator Preserve numbers X 16

17 Working spaces in Adobe InDesign Uses working spaces InDesign allows the most latitude for mixed color spaces every object on every page can have it s own embedded profile 17

18 Image color settings in InDesign 18

19 How to use working spaces on DFE For documents you create, set the DFE color settings to match your working space 19

20 How to identify embedded profiles From Adobe design applications Enfocus Pitstop 20

21 Checking embedded color space with Enfocus Pitstop 21

22 Using embedded profiles on DFE 22

23 Default Fiery color settings 23

24 Use embedded profile 24

25 PDF/X Output intent Defined by the Ghent Working Group (GWG) Output Intent is a way to standardize the appearance of a PDF file Output Intent tag contains an ICC profile that is used as a simulation profile for both on-screen viewing and printing 25

26 ICC color processing workflow 26

27 Using PDF/X Output Intent on the DFE 27

28 PDF/X Output Intent - CMYK 28

29 PDF/X Output Intent RGB 29

30 PDF/X output intent Why not always always enable PDF/X Output intent? Over-compression of colors may occur 30

31 Rendering Intent 31

32 What is gamut compression? Loss of color gamut when converting from a broad gamut source space such as RGB to a more narrow output gamut such as CMYK CMYK RGB 32

33 What happens to colors outside reproducible color gamut of the printer? Gamut Compression???????????? CMYK?? RGB RGB Source gamut CMYK Smaller destination gamut of printer 33

34 Rendering Intent Setting that defines the preference for gamut compression 34

35 Rendering Intent: Photographic Photographic (aka perceptual) smooth color transitions; relationship preserved Color 1 Color 1 Color 2 CMYK RGB RGB Source gamut CMYK Smaller destination gamut of printer 35

36 Rendering Intent: Relative Colorimetric Relative Colorimetric color accuracy for logos and graphics Color 1 Color 1 Color 2 CMYK RGB RGB Source gamut CMYK Smaller destination gamut of printer 36

37 Relative colorimetric vs. photographic Relative Colorimetric Photographic 37

38 Rendering Intent: Presentation Presentation aka saturation for business graphics Color 1 Color 1 Color 2 CMYK RGB RGB Source gamut CMYK Smaller destination gamut of printer 38

39 Rendering Intent: Absolute Colorimetric Absolute Colorimetric same as relative colorimetric with white point scaling for paper white Color 1 Color 1 Color 2 CMYK RGB RGB Source gamut CMYK Smaller destination gamut of printer 39

40 Best uses of rendering intents Photographic (aka perceptual) this rendering intent compresses the entries source gamut to fit in the destination gamut relationships between colors are preserved. Theoretically this is best for photographs. Relative Colorimetric this rendering intent compresses only the colors in the source gamut that are not also in the destination gamut. Best for logos and graphics. Presentation (aka saturation) this is the same as relative colorimetric but the colors in the destination gamut are all pushed toward the gamut corners where colors are pure. Best for business graphics. Absolute Colorimetric this is a special case of Relative Colorimetric. The color clipping is the same but the white point of the source is not scaled to the white point of the destination. This means the white of the source will be shown in the output as a tint even in non-image areas. This is mainly useful only for commercial proofing not for production printing. 40

41 Choosing rendering intent on the DFE 41

42 RGB rendering intent 42

43 CMYK rendering intent Processing methods: Full (Source GCR) Full (Output GCR) Pure Primaries Always relative colorimetric! 43

44 Rendering intent when using embedded profiles 44

45 Black point compensation 45

46 Black point compensation Maps the black point of the source profile to the black point of the output profile Helps to preserve detail in shadow areas Always desirable except for special applications such as proofing 46

47 Black point compensation Print Source = Newsprint ICC 47

48 Black point compensation Print Source = Newsprint ICC For Proofing 48

49 Problems printing with black Print Gray Using Black Only 49

50 Color management black failure R=128 G=128 B=128 L* = 62 a* = 0 b*= 0 C=40% M=30% Y=30% K =20% C=0% M=0% Y=0% K =50% L* = 58 a* = 0 b*= 0 C=38% M=27% Y=27% K =22% 50

51 DFE settings to avoid this failure To ensure you don t get a color click charge for black objects (K only output) Set RGB to: Text/Graphics Set CMYK to: Text/Graphics/Images 51

52 Pure black Pure black is RGB of 0,0,0 or CMYK of 0,0,0,100% 52

53 Black overprint Black overprint (for pure black) Use to trap text 53

54 Color management failures 54

55 Common causes for color management failure Calibration Imaging settings Color Settings Output Profile selection Lighting 55

56 Uncalibrated Calibrated Calibration: Accuracy vs. Consistency Consistent, but not Accurate Color Consistent, and Accurate Color Neither consistent nor Accurate Color Without ICC Profile Accurate on average, not consistent With ICC Profile 56

57 Calibration Over 30% of digital press owners never calibrate their DFE or only calibrate when a color failure occurs * Failure to calibrate on a consistent basis is the #1 cause of color related rework * Source: 2015 InfoTrends survey 57

58 DFE settings 1. Imaging settings 2. Source profile settings 3. Output profile selection Is it a custom profile? 58

59 1. Image settings 59

60 2. Source profile settings 60

61 3. Output profile selection Depending on the configuration of the DFE, output profile may be selected automatically or manually 61

62 Automatic output profile selection Start Job Properties Use Media Defined Profile selected? 62

63 Automatic output profile selection 63

64 Automatic output profile selection Start Job Properties Use Media Defined Profile selected? Yes Is Paper Catalog used in the job? 64

65 Automatic output profile selection 65

66 Automatic output profile selection Start Job Properties Use Media Defined Profile selected? Yes Is Paper Catalog used in the job? Yes Profile assigned in Paper Catalog? 66

67 Automatic output profile selection 67

68 Automatic output profile selection Start Job Properties Use Media Defined Profile selected? Yes Is Paper Catalog used in the job? Yes Profile assigned in Paper Catalog? Yes Output profile assigned in Paper catalog 68

69 Automatic output profile selection Start Job Properties Use Media Defined Profile selected? No Yes Is Paper Catalog used in the job? Yes Is a Profile assigned to the paper type? Profile assigned in Paper Catalog? Yes Output profile assigned in Paper catalog 69

70 Automatic output profile selection 70

71 Automatic output profile selection 71

72 Automatic output profile selection Start Job Properties Use Media Defined Profile selected? No Yes Is Paper Catalog used in the job? Yes Is a Profile assigned to the paper type? Yes Profile assigned in Paper Catalog? Yes Output profile assigned to paper type Output profile assigned in Paper catalog 72

73 Automatic output profile selection Start Job Properties Use Media Defined Profile selected? No Yes Is Paper Catalog used in the job? Yes Is a Profile assigned to the paper type? Yes No Profile assigned in Paper Catalog? Yes Output profile assigned to paper type Output profile assigned in Paper catalog 73

74 Automatic output profile selection Start Job Properties Use Media Defined Profile selected? Yes No Is Paper Catalog used in the job? Yes No Is a Profile assigned to the paper type? No Profile assigned in Paper Catalog? Yes Yes Color settings default profile Output profile assigned to paper type Output profile assigned in Paper catalog 74

75 Automatic output profile selection Start No Job Properties Use Media Defined Profile selected? Yes No Is Paper Catalog used in the job? Yes No Is a Profile assigned to the paper type? No Profile assigned in Paper Catalog? Yes Yes Output profile selected in Job properties Color settings default profile Output profile assigned to paper type Output profile assigned in Paper catalog 75

76 Lighting and metamerism Understanding metamerism New ISO viewing conditions M0, M1 and M2 76

77 Metamerism Two colors that look the same under one light source but different under another 77

78 Metamerism: Different light source R G B Wavelength (nm) 78

79 Viewing color in D50 light booth Color management only works in D50 79

80 Lighting best practices Only evaluate prints in D50 light booth Use professional grade ISO 3664:2009 compliant lamps For best results, profile and verify color using M1 80

81 Recommended DFE settings 81

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83 What we learned ICC color management basics Profile selection and embedded profiles PDF/X output intent Rendering intents Black point compensation Problems printing with black Color management failures Recommended DFE settings 83

84 Resources Fiery Color Flowchart 2016 and video Fiery Color Profiler Suite webpage Learn about features, watch videos, download resources and a free demo How-to guides Whitepapers Configuring Fiery color settings to optimize print quality Demystifying color standards FAQ: to cut or not to cut UV light in color profiling Download PANTONE libraries Ask the experts on our forums: Fiery Color and Imaging Fiery Color Profiler Suite 84

85 Q/A Fiery Forums FieryForums.efi.com 85

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