Print Color Management - Fingerprint & Profiling · 2 Rudi Weis-Schiff Director Business...
Transcript of Print Color Management - Fingerprint & Profiling · 2 Rudi Weis-Schiff Director Business...
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1Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
Print Color Management - Fingerprint & Profiling
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2
Rudi Weis-Schiff
Director Business Development
Janoschka
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Kosmas Jeropoulos
Project Manager OSC/In-House EMEA
Siegwerk
Kiran Deshpande
Global Senior Expert Color Management
Siegwerk
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➔ is a TASK !
PRINT COLOR MANGEMENT
✘it is not a cost
✘it is not a
waste of time !
Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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➔ it handles
all processes
in context
with matching
of COLORS
between
Contract Proof
and Print-Run
What is
PRINT COLOR MANGEMENT ?Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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COLORis one of the most important Assets of a Brand !
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7Page 723 July 2019
signed Digital-Target-Proof Printing-Result
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and now just imagine:that you have an entire product-family
and you want them all look the same…
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Printer A
Printer B
Printer C
Printer D
Too Blue!
Too Pale!
Too Red!
TooDark!
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Nothing looks like, what you wanted it to be !
Why is it different
from what I have
approved ...?
What am I going
to do now ??!!
• “The Artwork looked great, the print looks horrible…” !
• “This white is not white but grey…” !
• “The offset print looks great, why is it so bad in gravure…” ?
• “There is no uniformity within that range of product,
each size looks different…” !
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and then the discussion starts…
This is no
good !Why
is that?
▪ “This is an offset repro and not made for gravure…” !
▪ “ I have to add red to my yellow to make it work…” !
▪ “ this is not calibrated…” !
▪ “ this proof is no good…” !
and: it is too late!
▪ we have lost time !
▪ and money !
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1. Reducing setup-time
and waste
2. Simulate the final
printing result
= secure color-match
3. SAVE MONEY
Why do we need
PRINT COLOR MANGEMENT ?Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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Magenta
YellowCyan
Red
Green Blue
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Topics:
1. Color space
2. Tooling (plates, cylinders)
3. Fingerprinting (machine settings)
4. Profiling
5. The result
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Topics:
1. Color space
2. Tooling (plates, cylinders)
3. Fingerprinting (machine settings)
4. Profiling
5. The result
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Colors are not visual effects
anymore, today, colors:
▪ are defined values
▪ are measurable
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Color can be measured - CIELABThe International Commission on Illumination (CIE) defined the CIELAB Color-Space in 1976.
All colors are identified by 3 coordinates
L* = Lightness a* = Red – Green Axis b* = Yellow – Blue Axis
L* : 45
a* : 73
b* : -24
L* : 53
a* : -19
b* : -51
L* : 81
a* : - 19
b* : -51
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What we can see – versus what we
can make !
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Color Gamuts vary, influenced by:
▪ Different printers
▪ Different printing technologies
Fingerprint enables to know their different
Color-Gamuts and to align them
Printer A Printer B Printer C Printer D
Color Gamuts
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Topics:
1. Color space
2. Tooling (plates, cylinders)
3. Fingerprinting (machine settings)
4. Profiling
5. The result
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Tooling (cylinders, plates)Define a fingerprint test-form which should contain:
▪ Color-chart ECI-2002
▪ Pictures, product images
for visual control of print quality, reflecting
printers customer base and market
▪ Tone-scales, color balance
▪ Control elements, EAN, fine type (pos./neg.)
▪ Fogra media-scale
▪ Background at 30% (all colors)
▪ Company Logos
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Engrave Cylinders or Flexo-Plates
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Engrave Cylinders or Flexo-Plates
Cylinders according to:
▪ Standard engraving parameters
▪ Surface roughness and structure
according to specification
▪ Defined line/cm, angle, stylus
▪ Engraving technology (EM, Laser)
▪ Minimum tolerances
▪ All parameters need to be documented (pictures & values)
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Engrave Cylinders or Flexo-Plates
Flexo plate-making according to:
▪ Corresponding plates parameters
▪ Screens, angles, inking rollers
▪ Minimum tolerances
▪ All parameters need to be documented
(pictures & values)
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Topics:
1. Color space
2. Tooling (plates, cylinders)
3. Fingerprinting (machine settings)
4. Profiling
5. The result
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Process steps
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Process stabilization
Fingerprinting / Calibration
Profiling / Characterization
Stable process variables Bring the press to a known
desired benchmark
Provides repeatable output
Define the relationship between ink-
values (C, M, Y, K) and colors
(L*a*b* values)
Records a behavior of press
into color profileProvides a good starting point
WHAT?
WHY?
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Many items have impact
on the printing result…Each printing process and almost each job requires
specific technical parameters and expertise:
➔Different Printing Machines
➔ Different Substrates
➔ Different Printing Inks
➔ Environment: Temperature & Humidity
➔ People
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Printing machines…But also different printing machines,
processes and different machine settings
have big influence on the printing result…
➢Type of machine
➢ Number of Colors
➢ Printing Speed
➢ Impression Rollers / Pressure
➢ Viscosity of the inks
➢ Doctor-blade setting
➢Temperature, Humidity
➢ etc.
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Fingerprinting (example: gravure)
Printing-press settings according to:
✓Optimum production conditions
✓Optimum printing speed
✓Set ink-viscosity to standard
✓Set ink-density to standard
✓Check ink temperature
✓Optimum doctor-blade angle and pressure
✓Optimum pressure (pressure-roller)
✓Check environment conditions (temperature, humidity)
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Fingerprinting (example: gravure)
Printing quality:
✓Perfect register !
✓Check L*a*b* values & DE* against target
✓Check tone-values / grey-balance
✓Check tonal value for flooding
✓Measure and document dot-gain
in 75% - 50% - 25% 5% values
✓ Is 5% tone printing stable
✓ Is print streak-free
✓No scumming, no hazing
✓No repel, dissolution or break-off
✓Fingerprint “quality approval” by printer, tool-maker and ink-supplier Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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and bear in mind…
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and bear in mind…
Do not try to bend the printing machine settings to get a good looking sample:
▪ print as under “normal” or “relaxed” production conditions
▪ which can be repeated every day
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Documentation:Documentation of all cylinder parameters:
▪ Type of cylinders (shaft/shaft-less)
▪ Face-width / circumference
▪ Roughness
▪ Printing direction
▪ Surface / reverse print
▪ Color sequence
▪ Engraving parameters and specifications
Printer
Cyl. Manufacturer: Internal Job No.:
Type of Cylinder:
Way of print: Customer service
Facewidth:
Circumference: Janoschka No.
Roughness:
Engrav. Machine:
Seq Colour Screen Angle Stylus Cellwidth Depth Gamma
1
2
3
4
5
Printing machine: Corona Treatment:
Printing Speed: ESA:
Substrate:
Lacquer:
Ink Manufacturer:
Ink System: Retarder:
Viewing conditions: Backing material:
special backing material which needs to lay underneath a fingerprint / job
Seq Colour Visco* Density** Solvents Retarder Pressure Dotgain 25% Dotgain 50% Angle Pressure
1
2
3
4
5
recommended densities: K 1.80 - 2.00; C 1.50 - 1.70; M 1.35 - 1.50; Y 1.35 - 1.45
* Viscosity measured with ** Density measured with settings/filter : DIN / PAP / NO
*** Lab measured with settings/filter : D50 / 2° / ABS / NO
Ambient temperature: Type Doc blade:
Rel. Humidity: Overlap blade:
Inking roller: Hardness of impression rollers:
Other process steps to be taken into account:
Cylinder proof done by: Date Approved by:
Fingerprinting Specification Gravure
Cy
lin
de
r S
pe
cs
En
gra
vin
g S
pe
cs
Remarks
Doctor Blade
Pri
nti
ng
Sp
ec
sM
ach
ine S
pe
cs
5000 K
6500 K
Surface Reverse
ShaftlessShaft
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Documentation:Documentation of all printing parameters:
▪ Printing-machine
▪ Printing speed
▪ Substrate
▪ Doctor Blade / overlap-blade / angle / pressure
▪ ESA
▪ Corona treatment
▪ Hardness of pressure-roller and pressure
▪ Inking roller
▪ Temperature / Humidity
Printer
Cyl. Manufacturer: Internal Job No.:
Type of Cylinder:
Way of print: Customer service
Facewidth:
Circumference: Janoschka No.
Roughness:
Engrav. Machine:
Seq Colour Screen Angle Stylus Cellwidth Depth Gamma
1
2
3
4
5
Printing machine: Corona Treatment:
Printing Speed: ESA:
Substrate:
Lacquer:
Ink Manufacturer:
Ink System: Retarder:
Viewing conditions: Backing material:
special backing material which needs to lay underneath a fingerprint / job
Seq Colour Visco* Density** Solvents Retarder Pressure Dotgain 25% Dotgain 50% Angle Pressure
1
2
3
4
5
recommended densities: K 1.80 - 2.00; C 1.50 - 1.70; M 1.35 - 1.50; Y 1.35 - 1.45
* Viscosity measured with ** Density measured with settings/filter : DIN / PAP / NO
*** Lab measured with settings/filter : D50 / 2° / ABS / NO
Ambient temperature: Type Doc blade:
Rel. Humidity: Overlap blade:
Inking roller: Hardness of impression rollers:
Other process steps to be taken into account:
Cylinder proof done by: Date Approved by:
Fingerprinting Specification Gravure
Cy
lin
de
r S
pe
cs
En
gra
vin
g S
pe
cs
Remarks
Doctor Blade
Pri
nti
ng
Sp
ec
sM
ach
ine S
pe
cs
5000 K
6500 K
Surface Reverse
ShaftlessShaft
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Documentation:Documentation of all ink parameters:
▪ Ink Manufacturer
▪ Ink System
▪ Viscosity
▪ Density
▪ Solvents
▪ Retarder▪ Varnish / Lacquer
Printer
Cyl. Manufacturer: Internal Job No.:
Type of Cylinder:
Way of print: Customer service
Facewidth:
Circumference: Janoschka No.
Roughness:
Engrav. Machine:
Seq Colour Screen Angle Stylus Cellwidth Depth Gamma
1
2
3
4
5
Printing machine: Corona Treatment:
Printing Speed: ESA:
Substrate:
Lacquer:
Ink Manufacturer:
Ink System: Retarder:
Viewing conditions: Backing material:
special backing material which needs to lay underneath a fingerprint / job
Seq Colour Visco* Density** Solvents Retarder Pressure Dotgain 25% Dotgain 50% Angle Pressure
1
2
3
4
5
recommended densities: K 1.80 - 2.00; C 1.50 - 1.70; M 1.35 - 1.50; Y 1.35 - 1.45
* Viscosity measured with ** Density measured with settings/filter : DIN / PAP / NO
*** Lab measured with settings/filter : D50 / 2° / ABS / NO
Ambient temperature: Type Doc blade:
Rel. Humidity: Overlap blade:
Inking roller: Hardness of impression rollers:
Other process steps to be taken into account:
Cylinder proof done by: Date Approved by:
Fingerprinting Specification Gravure
Cy
lin
de
r S
pe
cs
En
gra
vin
g S
pe
cs
Remarks
Doctor Blade
Pri
nti
ng
Sp
ec
sM
ac
hin
e S
pe
cs
5000 K
6500 K
Surface Reverse
ShaftlessShaft
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Documentation:
and don’t forget:
▪ Viewing conditions (5000 K – 6500 K)
▪ Measuring conditions (D50, 2º)
▪ Backing material
(ex.: if printed material is laminated)
▪ … /
Printer
Cyl. Manufacturer: Internal Job No.:
Type of Cylinder:
Way of print: Customer service
Facewidth:
Circumference: Janoschka No.
Roughness:
Engrav. Machine:
Seq Colour Screen Angle Stylus Cellwidth Depth Gamma
1
2
3
4
5
Printing machine: Corona Treatment:
Printing Speed: ESA:
Substrate:
Lacquer:
Ink Manufacturer:
Ink System: Retarder:
Viewing conditions: Backing material:
special backing material which needs to lay underneath a fingerprint / job
Seq Colour Visco* Density** Solvents Retarder Pressure Dotgain 25% Dotgain 50% Angle Pressure
1
2
3
4
5
recommended densities: K 1.80 - 2.00; C 1.50 - 1.70; M 1.35 - 1.50; Y 1.35 - 1.45
* Viscosity measured with ** Density measured with settings/filter : DIN / PAP / NO
*** Lab measured with settings/filter : D50 / 2° / ABS / NO
Ambient temperature: Type Doc blade:
Rel. Humidity: Overlap blade:
Inking roller: Hardness of impression rollers:
Other process steps to be taken into account:
Cylinder proof done by: Date Approved by:
Fingerprinting Specification Gravure
Cy
lin
de
r S
pe
cs
En
gra
vin
g S
pe
cs
Remarks
Doctor Blade
Pri
nti
ng
Sp
ec
sM
ach
ine S
pe
cs
5000 K
6500 K
Surface Reverse
ShaftlessShaft
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Topics:
1. Color space
2. Tooling (plates, cylinders)
3. Fingerprinting (machine settings)
4. Profiling
5. The result
PRINT COLOR MANGEMENT Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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38Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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1200Ink supplier
Ink sytem
Color sequence
Viscosity
Solvent
Ink laying
Ink trapping
Additives
Temperature
RetarderDensity
LAB
Break-down
Printing speed
Drying
Impression roller
Substrate
Ink support
Doctor blade setting
Electrostatic support
Substrate
type Surface
Roughness
Surface tention
Surface Coating
EM engraved
Laser engraved
Resolution
Screen angle
Cell dimensions
Stylus angle
Gamma
Cylinder surface
Cylinder circumference
Humidity
Dust
Pick-date / information:
Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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Your color-gamut
Define your color-gamut:
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Fingerprinting and Profiling:
bring "essential components" together…
Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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42
Fingerprinting and Profiling:
bring "essential components" together…
Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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Profiling:Fingerprint sample produced under the BEST conditions:
▪ Printed test chart is the color-target
▪ read-in by automatic Spectro-photometers
▪ Profile calculation - seeking △E: 1
▪ Selective / visual corrections or fine-tuning carried-out by experts is possible
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Printer Specific Profile:➔ Pre-Press / Color Separation will be done with the application of these profiles
Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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Printer Specific Profile:
Digital-Proof
Barrel-Proof
Print-Run
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46
Topics:
1. Color space
2. Tooling (plates, cylinders)
3. Fingerprinting (machine settings)
4. Profiling
5. The result
PRINT COLOR MANGEMENT Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling
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47Page 4723 July 2019
signed target-proof Final printing-result
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Consistency and uniform quality:Regardless:
▪ Where and when it is printed
▪ What printing technology used
▪ Which Inks or Substrates used
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Jypyyy…!
Yes…!
Print-Color Management:
➢Efficiency improvement !
➢ Less Waste !
➢ Saved Money !
➢ Happy Customers !
Image to Print Istanbul, Turkey, July 2019 – Workshop Print-Color-Management - Fingerprinting and Profiling