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Color consistency between different HP Latex 2700 series printers, Color profiles

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Color calibration is based on the color measurement of printed color patches, using the embedded spectrophotometer. Some characteristics of substrates, such as surface roughness or transparency, may make reflective color measurement of some substrate types very inaccurate. Color calibration of these substrates may fail or produce unacceptable printing results. TIP: If color calibration fails at the first attempt, it is worth trying again. To delete the reference for a given substrate, so that you can create a new reference for that substrate, you must tap the Ellipsis icon , then Delete color reference. You should calibrate a substrate type before creating its color profile; however, you can later recalibrate without needing to recreate the color profile. Color consistency between different HP Latex 2700 series printers It is possible to print consistent colors on different HP Latex 2700 series printers by exporting a calibrated substrate preset from one calibrated printer to another. This process ensures that both printers use the same color references. For more information about substrate presets, see Substrate presets on page 65. 1. Create the reference for the first printer: do at least the first color calibration with the substrate in question. 2. Export the substrate preset from the first printer. The reference is also exported. 3. Import the substrate preset to the second printer. 4. Perform color calibration with the same substrate for the second printer, to make it consistent with the reference imported with the preset. Now both printers have the same reference for the same substrate, and all the consecutive color calibrations will be trying to match this reference state. Color profiles Color calibration provides consistent colors, but consistent colors are not necessarily accurate. For instance, if your printer prints all colors as black, its colors may be consistent but they are not accurate. In order to print accurate colors, it is necessary to convert the color values in your files to the color values that will produce the correct colors from your printer, your inks, and your substrate. An ICC color profile is a description of a printer, ink, and substrate combination that contains all the information needed for these color conversions. These color conversions are performed by your Raster Image Processor (RIP), not by the printer. For further information on the use of ICC profiles, see the documentation for your application software and for your RIP. Substrate-advance compensation Accurate substrate advance is important to print quality because it is part of controlling the proper placement of dots on the substrate. 134 Chapter 9 Printer calibration

Section	Page
Introduction	8
Welcome to your printer	8
Printer accessories and consumables	9
Documentation and useful links	9
Safety precautions	10
Main components	20
Printer software	22
Turn on the printer for the first time	22
Turn the printer on and off	23
Move the printer	24
Printer status beacon	25
HP Internal Print Server	27
Start the Internal Print Server	27
Internal Print Server widgets	28
Printer status and alerts	29
Update the printer’s firmware and software (Internal Print Server)	30
Internal Print Server settings and preferences	34
RIP distribution	35
Install and configure the RIP software	36
Install ONYX software and set up the driver	36
Install Caldera software and set up the driver	38
Printing workflows integration	41
Introduction to JDF	41
Benefits of working with JDF for file submission	41
Creating JDF job tickets	41
What printer information can be communicated to an MIS?	42
How to integrate the printer into the Caldera RIP	42
How to integrate the printer into the Onyx RIP	42
Job submission methods	42
How to integrate the printer into an MIS system or production control software	43
Handle the substrate	44
Supported substrate types	44
Supported HP substrates	46
Substrate tips	47
Color consistency	48
Substrate configurations	49
Prepare to print	50
Substrate edge holders	51
Load a roll onto the spindle	53
Load a roll into the printer	55
Double-sided printing	63
Output-platen light	67
Consistency mode (optimize for tiling)	67
Optimize for ink consumption	68
Create and manage print jobs	70
Add a new print job	70
Substrate presets	72
Use a new substrate	72
Prepare the printer for a new substrate	72
Add a substrate preset	72
Online substrate manager	78
Edit a substrate preset	83
Remove a substrate preset	86
Export multiple presets	86
Job properties	86
Set the carriage beam position	88
Handle the ink system	90
Ink system components	90
How to work with ink system components	93
Printing with white ink (2700W only)	120
Printer calibration	132
Align the printheads	132
Possible difficulties with printhead alignment	138
Color calibration	139
Color consistency between different HP Latex 2700 series printers	141
Color profiles	141
Substrate-advance compensation	141
Calibrations specific to one substrate preset	146
Recommended calibrations after particular events	146
Accessories	147
Accessory compatibility	147
Spindle	147
Dual-roll printing	148
Jumbo dual-roll kit	150
Diverter roller	151
In-line slitters	152
Substrate saver	154
Ink collector	159
Roll to free fall	164
Roll to collector	164
Hardware maintenance	166
Safety precautions	166
Maintenance resources	166
Summary of maintenance operations	168
How to perform maintenance operations	169
Diagnostics	266
Troubleshoot substrate issues	269
Substrate cannot be loaded successfully	269
Substrate has jammed	269
Substrate is not attached to the core and/or spindle	270
Substrate is not flat	271
Spindle latch suddenly opens during printer operation	271
Substrate advances with a loud continuous sound of vibration	271
There is skew or telescoping on the output spindle	272
There are wrinkles and ink smears on the substrate	273
There are ink marks on the substrate	276
Substrate sticks to the platen	276
There are physical marks on the substrate	277
There are drops of ink on the substrate	278
Print is shorter than expected	279
How to achieve better consistency between jobs of the same length	279
Collector stops winding	280
Collector occasionally fails to work correctly	280
Collector winds in the wrong direction	281
Substrate is detached or winds around the collector in the wrong direction	281
There is skew or telescoping on the collector	281
Substrate has jammed on the collector	281
Troubleshoot print-quality issues	282
General advice	282
Basic and advanced troubleshooting	283
Troubleshoot ink cartridge and printhead issues	298
Ink cartridges	298
Printheads	299
Printhead cleaning roll errors	304
Troubleshoot other issues	305
Printer does not start	305
Printer does not print	305
Printer cannot be restarted from the Internal Print Server	305
Printer seems slow	306
Request to reinitialize the carriage	306
Internal Print Server cannot detect the printer	306
Color calibration fails	306
Movable Slot System sensor errors	307
When you need help	309
HP Customer Care	309
HP PrintOS: the cloud-based platform for print specialists	309
Printer specifications	330
Functional specifications	330
Physical specifications	331
Memory specifications	332
Power specifications	332
Air supply requirements (pneumatic spindle)	332
Environmental specifications	333
Acoustic specifications	333
Flexible substrate recommendations	335
Predefined substrate settings	335
Self-adhesive vinyls	335
PVC banners	336
Papers	336
Textiles	337
Flexible films	337
Print-quality-troubleshooting summary table	339
Glossary	340

Match case Limit results 1 per page

Color calibration is based on the color measurement of printed color patches, using the embedded

spectrophotometer. Some characteristics of substrates, such as surface roughness or transparency, may make

reﬂective color measurement of some substrate types very inaccurate. Color calibration of these substrates may

fail or produce unacceptable printing results.

TIP:

If color calibration fails at the ﬁrst attempt, it is worth trying again.

To delete the reference for a given substrate, so that you can create a new reference for that substrate, you must

tap the Ellipsis icon

, then

Delete color reference

You should calibrate a substrate type before creating its color proﬁle; however, you can later recalibrate without

needing to recreate the color proﬁle.

Color consistency between diﬀerent HP Latex 2700 series printers

It is possible to print consistent colors on diﬀerent HP Latex 2700 series printers by exporting a calibrated

substrate preset from one calibrated printer to another.

This process ensures that both printers use the same color references.

For more information about substrate presets, see

Substrate presets

on page

Create the reference for the ﬁrst printer: do at least the ﬁrst color calibration with the substrate in question.

Export the substrate preset from the ﬁrst printer. The reference is also exported.

Import the substrate preset to the second printer.

Perform color calibration with the same substrate for the second printer, to make it consistent with the

reference imported with the preset.

Now both printers have the same reference for the same substrate, and all the consecutive color calibrations will

be trying to match this reference state.

Color proﬁles

Color calibration provides consistent colors, but consistent colors are not necessarily accurate. For instance, if

your printer prints all colors as black, its colors may be consistent but they are not accurate.

In order to print accurate colors, it is necessary to convert the color values in your ﬁles to the color values that will

produce the correct colors from your printer, your inks, and your substrate. An ICC color proﬁle is a description of a

printer, ink, and substrate combination that contains all the information needed for these color conversions.

These color conversions are performed by your Raster Image Processor (RIP), not by the printer. For further

information on the use of ICC proﬁles, see the documentation for your application software and for your RIP.

Substrate-advance compensation

Accurate substrate advance is important to print quality because it is part of controlling the proper placement of

dots on the substrate.

134

Chapter 9

Printer calibration