Emulation Proofing for Digital Presses · FredsFlexoPress on White 7c Sue’s HP Indigo 20000...

Emulation Proofing for Digital PressesYour digital press should be a press - not a proofing device.

Mark SamworthColor Specialist

!Let’s start with something slightly off topic that you could only do at the PIA color conference!

Which Do You Prefer?

Chroma Level A

Chroma Level A

Chroma Level B

Chroma Level B

?What is an Emulation Proof?

The Use Case for Emulation Proofing

Conventional Press Digital Press Proofer

When your digital press is emulating something else and it can’t emulate it perfectly

What is a Proof?

high fixed cost / low variable cost low fixed cost / high variable cost

What is a Proof?

Source Destination

What is a Proof?

Destination

GRACoL2006.icc

Source

SubstrateCorrected

What is Emulation?What is a Proof?

Source Destination

What is Emulation?

Source Destination

What is Emulation?

Destination

GRACoL2006.icc

SubstrateCorrected

Source

Source Destination

What is an Emulation Proof?

?

00Master Colors

(as mixed by Pantone with 14 liquid based inks)Dependent Aim Colors

(as printed on Sue’s HP Indigo 20000 with CMYK dots)Pantone+ Solid Coated

Purple Purple Purple Purple

CMYKCMYK + Spot CMYKOGV


Destination SourceSource Destination


?/

GRACoL2006.icc

SubstrateCorrected

Source Destination


Destination Source/

Source Destination


Destination Source/

Source


Digital Printing StrategyDestination

Destination


Source

Proofing Strategy

Source Destination


Proofing StrategyDigital Printing StrategyDestination Source/

!The Best Way to Understand Emulation Proofing

Make a Proof Using Two Separate Workflows

!You Don’t Need Emulation Proofing Software to Make an Emulation Proof.

But is sure does help!

Source Destination

Step 1 – Match Your Digital Press to Your Source

Raw Flexo Press Profile Raw Digital Press Profile

+ =

Digital Press Emulating Flexo Press

Raw Flexo Press Profile

Raw Digital Press Profile


3 Profiles to Create




3 Profiles to Create

Goal of Step 1

Source

Step 2 – Match Your Proof to Your Digital Press

*Digital Press Emulating Flexo PressRaw Proofer Press Profile

+ =

Emulation Proof

Destination

*

The Proofer Profile(same for “normal” or “emulation” proofing)

Raw Proofer Profile

4 Total Profiles to Create

4Raw Flexo Press Profile

1


2


3Raw Proofer Profile


1


2


3Raw Proofer Profile

An Emulation Proof Workflow Uses 3 Profiles

Emulation Proof Workflow

Fred’s Flexo Press on White 7c Sue’s HP Indigo 20000

Sue’s HP Indigo 20000 to Fred’s Flexo Press

Sue’s HP Indigo 20000Dayton Epson P7000

Dayton Epson P7000 to Sue’s HP Indigo 20000


1


2

Raw Proofer Press Profile

3

Fred’s Flexo Press on White

Sue’s HP Indigo 20000

Dayton Epson P7000

!Emulation Proofing is More Than Just Reducing the Number of Profiles!

Source Destination

More Profiles = More Measurement Error

Raw Flexo Press Profile Raw Digital Press Profile

+ =


Reduced Measurement Error = Increased Color Accuracy

Emulation Proof Workflow

Fred’s Flexo Press on White 7c Sue’s HP Indigo 20000

Sue’s HP Indigo 20000 to Fred’s Flexo Press

Sue’s HP Indigo 20000Dayton Epson P7000

Dayton Epson P7000 to Sue’s HP Indigo 20000


1


2


3

*Fred’s Flexo Press on White

Sue’s HP Indigo 2000

Dayton Epson P7000

* No “additional”profiles are required. In most cases, all profiles are already made and used in “normal” workflows.

Only “Raw” Profiles

Digital Press

Source Destination

Color Conversion Example

Destination Source/

C MYK

100% 0%0%0%

LAB

55-37-50

C MYK

100% 4%2%1%

LAB

57-36-49

C MYK

93% 9%6%3%Flexo Press Digital Press Epson Proofer

?How Do I Check the Process Color Accuracy of my Emulation Proof?

Checking Color Accuracy of the Emulation Proof

1. Proof Chart 2. Measure Chart 3. Compare to Aim


Proof of Digital Press Emulating Flexo Press

1.223.220.781.110.97

Million Dollar Question



0.923.220.780.790.84

aim

actualmeasurements

What is the Aim?

Color AccuracyResult




1.423.220.781.110.97

aim

What is the Aim?




1


2


3



1


2 3






0.892.100.781.110.79

aim

What is the Aim?

The Ultimate Aim:

The True Aim:

The Compromise Aim:

The print specification for your shop

Your digital press matched ACAP to your substrate corrected ultimate aim.

Aims for Emulation Proofing

- GRACoL- Your flexo press in its “natural” state- Your flexo press matched ACAP to GRACoL

(bad idea)

Digital Press

Source Destination

The True Aim

Destination Source/

C MYK

100% 0%0%0%

LAB

55-37-50

C MYK

100% 4%2%1%

LAB

57-36-49

C MYK


93% 9%6%3%Digital Press

Source Destination

The True Aim

Destination Source/

C MYK

100% 0%0%0%

LAB

55-37-50

C MYK

100% 4%2%1%

LAB

57-36-49

C MYKFlexo Press Digital Press Epson Proofer

The Ultimate Aim:

The True Aim:

The Compromise Aim:

The print specification for your shop

Your digital press matched ACAP to your substrate corrected ultimate aim.

Your substrate corrected ultimate aim.

Aims for Emulation Proofing

- GRACoL- Your flexo press in its “natural” state- Your flexo press matched ACAP to GRACoL

(bad idea)

Digital Press

Source Destination

The Compromise Aim

Destination Source/

C MYK

100% 0%0%0%

LAB

55-37-50

C MYK

100% 4%2%1%

LAB

57-36-49

C MYK


Digital Press

Source Destination

The Compromise Aim

Destination Source/

C MYK

100% 0%0%0%

LAB

55-37-50

C MYK

100% 4%2%1%

LAB

57-36-49

C MYK


substrate corrected

Color PilotDigital Press

StrategyFredsFlexoPress on White 7c Sue’s HP Indigo 20000

Relative Colorimetric = Substrate Correction to Destination

Color PilotDigital Press

StrategyFredsFlexoPress on White 7c Sue’s HP Indigo 20000

Relative Colorimetric = Substrate Correction to Destination

GRACoL2006.Coated1

Will match GRACoL2006.Coated1 substrate corrected to the substrate of Sue’s HP Indigo 2000 profile.

Substrate Correction to DestinationMean No Dots in Print

pure substrate

Substrate CorrectionGRACoL2006.Coated1

L95.0 a0.0 b-2.0

Substrate of Digital Press

L87.3 a-1.0 b-1.5L36.3 a48.6 b18.9 L32.5 a44.5 b17.7

Substrate Correction in Color Pilot 16.1Substrate of Digital PressGRACoL2006.Coated1



0.892.100.781.110.79


What is the Aim?


GRACoL2006.Coated1

Proof of Digital Press Emulating GRACoL2006

What is the Aim?

aim

actualmeasurements


3.8711.928.134.934.13


GRACoL2006.Coated1_L87.3_a-1.0_b-1.5

Proof of Indigo Emulating GRACoL2006_L87.3_a-1.0_b…

What is the Aim?

aim

actualmeasurements


0.822.050.030.590.82

!The Future: Substrate Correct the Reference in the Compare Tool


Proof of Indigo Emulating GRACoL2006_L87.3_a-1.0_b…

What is the Aim?

aim

actualmeasurements


0.802.030.000.570.79

GRACoL2006.Coated1

√ Substrate Correct Reference

?What About Spot Colors?

00Master Colors

(as mixed by Pantone with 14 liquid based inks)Dependent Aim Colors

(as printed on Sue’s HP Indigo 20000 with CMYK dots)Pantone+ Solid Coated

Purple Purple Purple Purple

PANTONE 286 C MASTER

PANTONE 286 DEPENDENT





Emulation Proof Verification Chart

CMYKProcess(IT8.7-4)

SpotColors

Spot Color Accuracy Check

NormalProof

HP IndigoCMYK

Pantone Solid CoatedMaster Standard

masterstandard

dependentaim

Pantone Solid CoatedMaster Standard

Sue’s HP Indigo CMYKDependent Aim

Emulation Proof Verification Chart

CMYKProcess(IT8.7-4)

SpotColors

!The Ultimate Spot Color Check?

The Esko SpotColorCheck_600 Chart

The science of process color matching is based on standardized data sets!

Sue’s HP Indigo 20000 PressGRACoL2006.Coated1.icc

!No Such Data Set Exists for Spot ColorsUntil Now …

The SpotCheck_600 Color Data SetA Standardized Data Set for Spot Color Assesment

SpotCheck_600 Aims

SpotCheck_600 Results

Where did the SpotCheck_600 Color Data Set come from?

Matt Furr ThesisClemson University - 2014

100COLORS

100COLORS

100COLORS

100COLORS

100COLORS

100COLORS

The SpotCheck_600 Color Data SetA Standardized Data Set for Spot Color Assesment

RIT ResultsAVG = 0.99MAX = 4.4295% = 3.26

?When Don’t You Need an Emulation Proof?i.e. when can you just use a normal proof?

Case 1When Your Digital Press Can Match Your Ultimate Aim

Source DestinationDestination Source/

Case 1When Your Digital Press Can Match Your Ultimate Aim

Source DestinationDestination Source/GRACoL2006.icc

substratecorrected

Case 2You have a PDF in Your Digital Press Color Space


Case 3When Your Digital Press is Not Emulating Anything


?When Do You Need an Emulation Proof?i.e. when can’t you just use a normal proof?

The Use Case for Emulation Proofing

Conventional Press Digital Press Proofer

When your digital press is emulating something else and it can’t emulate it perfectly

Emulation Proofing for Digital PressesYour digital press should be a press - not a proofing device.

Mark SamworthColor Specialist

Emulation Proofing for Digital Presses · FredsFlexoPress on White 7c Sue’s HP Indigo 20000...

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