How consistent is your color in printing? Checking Printer Calibration X-Rite Color Management for Grand Format Printers
Printer calibration webinar
Sep 07, 2014
X-Rite Color Management for Grand Format Printers: Checking Printer Calibration
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How consistent is your color in printing?
Checking Printer Calibration
X-Rite Color Management forGrand Format Printers
Sponsor
X-Rite is the global leader in color science and technology
Pantone is part of the family
Mature product line for printing and graphic arts markets
Today's Speaker – Dan Reid
o Founded in 1998 to help business realize the benefits of color management
o Consulting and product sales for some of the largest and smallest print providers
o Early adopter of G7 calibration technique for non-litho applications. Certified by IDEAlliance in 2006
Agenda
• Analyse printing using a color measurement device and software
• Visualize
o Reducing Ink Limits
o Calibration Methods
o Affects of G7 Tuning
• Tips and Recommendations
• Q&A
(1st Poll Question)
How confident are you in matching jobs previously printed jobs?
(2nd Poll Question)
To control color you first must be able to measure
Without a color measurement device you won’t be able to compensate when the color deviates beyond a defined color tolerance
Inexpensive and proven technology
Methods for quantifying color deviance
• Expressed in a unit called Delta-E (ΔE)o There have been several updates to the
original specification
o ΔE76
is well used to define device variance.
Also widely used to communicate color matching
o ΔE00
better matches how
eye perceives color. Recommended replacement for some ISO specifications
∆E76
∆E00
Methods for quantifying color deviance
Images Courtesy of SpotOn! Press
Common Methods for Ink Limiting
• Spectral Density – Density derived from spectral measurements
• Chromatic – Restricts based upon maximum chroma – derived from LAB
• a*b* – Considers hue angle
o Ascertain how large of hue shift from the ¼ tones and mid tones to the shadows
o Restricting more aggressively helps in ICC profiling later. Keep an eye on how chroma is affected.
How is this Ink Limiting?
Ink Limit – Unrestricted
Ink Limit – Restricted
Ink Limit — Unrestricted vs Restricted
• Same methods used for ink limiting are typically applied also for calibration
• Advanced methods refine calibration based upon neutrality and visual contrast
Calibration | Linearization
Uncalibrated Printer
Calibrated
Calibrated vs Uncalibrated
Calibrated
• Difficult for RIP vendors to create a massive library for different printer and media combinations
• Measuring actual output will invariably offer superior results than supplied printer color calibration data sets
• Using a color data sets on a different media usually results in a color shift or bias of some sort. Without a color measurement device that bias is difficult to eliminate.
RIP vendor supplied color data sets
Simulation of color bias of using a similar glossy paper data set
RIP Vendor ICC Profile Custom ICC ProfileOriginal SWOP v2 sep
Vendor supplied ICC Profile
G7 Calibrated ICC Profile
Tips for Measuring Charts in Grand Format printing
• Check for sheet consistency.
o Create a job that is complete width of sheet or roll. Use 25/19/19/0 fill color for the complete sheet size. This will quickly show any color variability across the sheet.
o If variance is noticed, service is needed or if not possible then data averaging can be used
A1 2G1
A49 2G49
IT8.7-4 CMYK visual 1P i1iSisi1Profiler Test Chart Page: 1 of 1; Size: 22.2 x 36.4 cm
Copyright X-Rite 2011
Tips for Measuring Charts in Grand Format printing
• Check for sheet consistency.
o Create a job that is complete width of sheet or roll. Use 25/19/19/0 fill color for the complete sheet size. This will quickly show any color variability across the sheet.
o If variance is noticed, service is needed or if not possible then data averaging can be used
A1 2G1
A49 2G49
IT8.7-4 CMYK visual 1P i1iSisi1Profiler Test Chart Page: 1 of 1; Size: 22.2 x 36.4 cm
Copyright X-Rite 2011
• Check for sheet consistency.
o Measure the same chart in several areas of the sheet or roll to capture the variance
o Rotate charts 180ᵒ to capture variance
o Average these measurement together to create a master data file
o Doesn't have to be hundreds of patches
Tips for Measuring Charts in Grand Format printing
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1 0 0 7 0 3 0 1 0 0 1 0 2 5 5 0 7 5 9 0 1 0 01 0 0 6 0 1 0 0 7 0 3 0 1 0 0 6 0 4 0 7 0 4 07 0 3 0 1 0 0 4 0 4 0 1 0 0 4 0 1 0 0 4 0 7 0 4 0 7 0 4 0 4 0 34 0 7 0 4 0 7 0 4 0 4 01 0 0 6 0A
3%ISO 12647-7 Digital Control Strip 2 0 0 9
Standard IT8.7/3 or IT8.7/4 charts are not well suited for grand format printing.
o Do not have enough patches to adequately characterize the print process
o Designed for highresolution printing.
Grand format printing is usually lower resolution and makes it difficult for themeasuring device to detect patches.
Tips for Measuring Charts in Grand Format printing
• i1 Pro users should create charts with patches that are 12 x 12mm or larger. This helps with lower resolution printing
Increase patch separator to make it easier for the i1 Pro to recognize the different patches
Tips for Measuring Charts in Grand Format printing
• i1 Pro with i1 iO table
o If you are using i1 Pro with an i1 iO table considerusing charts thathave 10.0 x 10.5mm patches or larger
Tips for Measuring Charts in Grand Format printing
i1 Pro2 works well with low resolution output
o I1 Pro2 is less prone to this issue because it uses an alternating black and white checker to determine location instead of patch recognition
Tips for Measuring Charts in Grand Format printing
• i1 Pro2
o I1 Pro2 users can use 10 x 10mm patch or larger if they experience measuring issues. If you use the included
measuring track youwill have the least amount of measuring errors
Zebra pattern recognitionof i1Pro2
i1 Pro2 ruler is now metal – won't stick to solvent printing
Tips for Measuring Charts in Grand Format printing
• i1 Pro2 with i1 iO table (2nd gen)
o i1 Pro2 users should use 10 x 8mm patch or larger if experience measuring issues.
o If building charts in i1Profiler software use the non-compatibilitymode for improved layout
Tips for Measuring Charts in Grand Format printing
• To have repeatable color you need to measure print color with a spectrophotometer
• A spectrophotometer with your RIP software provides a means to compensate when printing deviates fromoptimum printing.
• Measuring a color barcan inform you if printing is consistent or if color match is within tolerance.
Summary
• X-Rite i1BasicPro2
• X-Rite i1PublishPro2
• X-Rite i1iO Measurement Table
X-Rite i1Pro2 Family
(Poll Question)
Do you have challenges matching across different printing technologies?
Standard IT8.7/3 or IT8.7/4 charts are not well suited for grand format printing.
o Do not have enough patches to adequately characterize the print process
o Designed for highresolution printing.
Grand format printing is usually lower resolution and makes it difficult for themeasuring device to detect patches.
Tips for Measuring Charts in Grand Format printing
• G7 for Grand Format Printers• What G7 is and what it is not
• Why consider implementing G7
• Communicating Color for Grand Format• Input | Reference color spaces
• RGB files
• New and old school PMS color
Upcoming Webinars
September 25th 2013
August 14th 2013
Limited Time Special
Coupon: XCAL1
www.RPimaging.com/xcal1.html
- Offer Expires 08/09/13 -
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How consistent is your color in printing?
Checking Printer Calibration
X-Rite Color Management forGrand Format Printers
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