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The Effects of Clear Toner on the Color Gamut of a Digital
The Effects of Clear Toner on the Color Gamut of a Digital

The Effects of Clear Toner on the Color Gamut of a Digital - PowerPoint Presentation

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The Effects of Clear Toner on the Color Gamut of a Digital - Description

Robert Grotans Western Michigan University December 7 2010 Overview Background Experimental Results Conclusion Understanding Color Illuminant Sample Spectrum Standard Observer What is Color Gamut ID: 541866 Download Presentation

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clear toner test sample toner clear sample test color chart profiling profile substrate gamut lab conclusion gloss text print

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Presentation on theme: "The Effects of Clear Toner on the Color Gamut of a Digital"— Presentation transcript

Slide1

The Effects of Clear Toner on the Color Gamut of a Digital Press

Robert Grotans

Western Michigan University

December 7, 2010Slide2

Overview

Background

Experimental

Results

ConclusionSlide3

Understanding Color

Illuminant + Sample Spectrum + Standard ObserverSlide4

What is “Color Gamut”?

1931 x, y Chromaticity DiagramSlide5

Profiling1. Calibrate your device2. Print, display, or scan a test chart

3. Measure the test chart4. Use profiling software5. Produce a profileSlide6

Experimental

List of Substrates

Substrate

Name

GSM

1

20# Hammermill Bond

75

2

24# Beckett Writing (super smooth)

90

3

60# Husky Opaque Offset

89

4

60# 4CC Storaenso Cover

160

5

80# Sappi Flo Gloss Digital Text

118Slide7

1. Calibrate The DeviceShading CorrectionGradation Auto AdjustFiery RIP CalibrationSlide8

2. Print a Test Chart

ECI2002R CMYK test chartSlide9

3. Measure the Test ChartSlide10

4. Use Profiling SoftwareSlide11

5. Produce a ProfileInstall profileVerify profile for accuracySlide12

Analysis

Gamut ComparisonLAB Value Comparison(39.79, 15.83, 18.12)(44.01, 16.07, 17.5)Slide13

GretagMacbeth™ ColorChecker Slide14

CalculationsΔE = √(L1

-L2)2 + (a1-a2)2 + (b1-b2)2 = √(39.79-L2

)2 + (15.83-a2

)

2

+ (18.12-b

2

)2 = √(39.79-44.01)

2 + (15.83-16.07)2 + (18.12-17.5)2

ΔE = 4.27

ΔL = (L1-L2) =(39.79-44.01) = -4.22ΔC = √(a12+b12) - √(a2

2+b22) = √(15.832

+18.122) - √(16.072+(-17.5)2

) = 0.3Slide15

Sample 1 – 20# Hammermill Bond

Without 312,879

With 228,669Slide16

Sample 2 – 24# Beckett Writing

Without 322,846

With 255,525Slide17

Sample 3 – 60# Husky Offset

Without 338,949

With 239,272Slide18

Sample 4 – 60# Cover

Without 404,957

With 267,681Slide19

Sample 5 – 80# Gloss Text

Without 330,186

With 242,463Slide20

LAB Values

Clear Toner Over Vs. Clear Toner Under

Substrate

ΔE

Δ

L

Δ

C

1

3.18

-1.87

1.08

2

2.47

-1.19

0.31

3

1.54

-0.06

0.17

4

3.11

-1.88

0.74

5

2.15

-0.58

1.15Slide21

LAB Values

Without Clear Toner Vs. Clear Toner Over

Substrate

ΔE

Δ

L

Δ

C

1

4.78

-0.59

-3.20

2

4.60

-2.46

-3.01

3

7.22

-1.65

-4.29

4

6.86

-1.74

-3.68

5

4.75

-1.42

-2.81Slide22

ConclusionNot a lot of difference between clear toner over or underClear toner originally reduced the color gamut by 20-35%Knowledge gained

Recommendations

PaperOriginal Clear TonerNew Clear Toner

94.7, 2.1, -7

88.3, 1.8,-6.2

92.1, 2.1, -6.7Slide23

Special ThanksMark Gundlach and Michelle DeFouw, X-RiteDr. FlemingPCI DepartmentSlide24

Thank You!

Questions?