HP Designjet L25500 60 in User Manual

							2.Put the piece of media on the top of the leading edge of the textile material to load.
3.Load the media as normal, see Load a roll into the printer (automatically) on page 19 for details.
4.The piece of media will pass through the printers media path with the textile media and emerge
from the other side.
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							5.The piece of media will rest on top of the loaded textile media and will fall to floor during the load
process, if this does not occur, simple remove it by hand. Continue to load the media as normal
and adjust the skew accordingly.
View information about the substrate
On the printers front panel, select the  icon, and then select View loaded substrate > View substrate
details.
The following information appears on the front panel:
●The roll status
●The substrate family that you have selected
●The width of the substrate in millimeters (estimated by the printer)
If no substrate is loaded, the message Out of substrate appears.
The same information appears on the Embedded Web Servers Supplies page.
Media Length Tracking Feature
The media length tracking feature enables you to keep track of how much media you have used and
how much is remaining on the roll.
1.When the roll is first loaded onto the printer you have the option to enter the length of media on the
roll. The amount of media that is then subsequently used is then tracked.
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							2.When the media is being unloaded, the front panel will display the amount remaining so that you
can note down for future reference.
3.Next time the media is loaded, you can enter in the remaining length, and the printer will again
track the media as it is used. If the media was never actually unloaded, for example if there was a
media jam and the media was unloaded and the printer was turned off and on, if you select Last
know Length the printer will apply the values from when the jam occurred (if the tracking feature
was enabled).
The remaining length of media is always displayed on the Substrate area of the front panel. If your
RIP has the functionality, this information will also be displayed in the RIP.
Enabling/Disabling the Length Tracking feature
1.The length tracking feature can be disabled or enabled from the front panel. On the printers front
panel, select the 
 icon>Substrate handling options>Substrate length Tracking.
2.Select On or Off.
Store the substrate
The following are tips for storing substrate:
●Always keep unused rolls wrapped in the plastic wrap to prevent discoloration. Rewrap partially
used rolls if they are not being used.
●Do not stack rolls.
●Allow all substrates to adapt to room conditions out of the packaging for 24 hours before printing.
●Handle film and glossy substrates by the edges or wear cotton gloves. Skin oils can be transferred
to the substrate, leaving fingerprint marks.
●Keep the substrate tightly wound on the roll throughout the loading and unloading procedures. If
the roll starts to unwind, it can become difficult to handle.
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							Download media presets
Each supported substrate type has its own characteristics. The printer changes the way it prints on each
different substrate type. The RIP requires a description of the requirements of each substrate type. This
description is called the “media preset”.
The media preset contains the ICC color profile, which describes the color characteristics of the
substrate. It also contains information about other characteristics (RIP and printer settings) and
requirements of the substrate that are not directly related to color. Media presets for your printer are
installed in the RIP.
The RIP contains media presets for only the most commonly used substrate types. If you buy a substrate
type for which your RIP has no preset, you can obtain a preset for a new substrate type in the following
ways:
●Try to download the media preset from the substrate manufacturers Web site.
●If it is not there, try to download it from the RIP companys Web site.
●If it is not there, check availability using the “Media Finder” search application located at
www.hp.com/go/L25500/solutions
●If you cannot find it anywhere, create a new media preset in the RIP. See 
Add a new substrate
type on page 40.
Add a new substrate type
This section is provided in case you decide to make your own media preset. Normally there is no need
to do this if you can find ready-made presets for all the substrates that you use.
Summary
1.Choose the generic substrate family by referring to the table in Select printer settings and color
profile on page 41.
2.In the RIP, create a copy or use an available media preset from the chosen substrate family
3.Select a name for the new media in case you create a copy.
4.Load the new substrate into the printer.
5.If media is smaller than printer width its better to locate the media to the leftmost position in the
spindle so it is centered in the print zone.
6.Select the generic substrate family to start In the printer front panel from the table in 
Select printer
settings and color profile on page 41
7.Disable the substrate advance sensor (OMAS) in your RIP software if the substrate is transparent
or dark, or if the printer recommends doing so during the loading process.
8.Align the printheads. See the Maintenance and troubleshooting guide.
9.In your RIP software, open the HP diagnostic chart, which you can obtain from the Embedded Web
Server at http://ip-addr/hp/device/webAccess/images/new.tif, where ip-addr is the IP address of
your printer. Alternatively, you can find the chart on the Web under 
http://www.hp.com/go/l25500/
manuals/.
10.Select the number of print passes. See 
Select the number of passes on page 44.
11.Print the chart.
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							12.If you experience a substrate jam or noticed ink smears or substrate damage while printing, see
the Maintenance and troubleshooting guide.
13.Check (and correct if needed) the ink quantity in the printed plot; see 
Check the ink quantity of ink
on the substrate on page 45. The print may not be completely dry at this stage; this is normal
and not a problem.
14.After a little time, the print should be completely dry. If the ink smudges when touched, see the
Maintenance and troubleshooting guide.
15.If you notice any print quality problems, see the Maintenance and troubleshooting guide.
16.If you would like to print faster, see 
Faster printing on page 47.
17.You should use your RIP software to color-calibrate and color-profile the new substrate. See 
Color
calibration on page 47, Color profiles on page 48 and the RIP documentation.
Select printer settings and color profile
The correct printer settings for your substrate may be available from your RIP vendor or substrate
vendor. If not, you can start by copying printer settings from a generic or similar substrate. Substrates
may be divided into the following families.
Substrate familyDescription
Self-adhesivePVC films with adhesive on one side, which can be white-finished or transparent. The liner can be
paper- or plastic-based. There are two main manufacturing processes: calendering and casting. There
are also variations such as perforated vinyl to be placed on windows. These substrates may need
manual rather than automatic printhead alignment.
BannerUsually a polyester mesh (or fabric) with PVC coating. There are also recyclable versions to cover
the same applications (green banners). Banners can be frontlit or backlit.
FilmUsually a polyester film (although there are other materials such as PVC, PC, etc) for backlit
applications. They are typically translucent, although there are also transparent versions.
FabricFabric medias are usually composed of polyester fibers. Some of the fabric media types come with
a liner to avoid the ink trespassing the media. Fabric materials which are very stiff (such as polyester
canvases) should preferably be loaded as “Photorealistic-Low temperature”.
MeshUsually a polyester mesh covered with PVC coating with holes. Some of these substrates may have
a liner and be self-adhesive.
Paper-AqueousPaper based (cellulose) media with or without coating or offset paper. The main difference with the
billboards is that these papers are not compatible with solvent inks. Weight is usually around the
100gsm
Paper-SolventPaper based (cellulose) substrates with coating to allow their use in solvent printers. They usually
have a limited water resistant performance.
HP Photorealistic-Low
Temperature SubstratePaper based (cellulose) media with coating (gloss and matte finishing). It has a weight higher than
the other billboard and offset substrates (200gsm or higher). The main difference is its rigidity.
Synthetic Paper Substrates manufactured using synthetic resin, mainly extruded from polypropylene (PP). They have
characteristics similar to those of plastic film, but their appearance and properties are similar to regular
paper made from wood pulp.
Here are some recommended default settings for each substrate family, which can be used as a starting
point.
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							Substrate familyDrying
temp.Curing
temp.Heating
airflowAuto-
tracking
(OMAS)CutterSubstrate
-advance
compens
ationInput
tensionVacuum
Self-adhesive vinyl5511030YesYes01525
Banner5011045YesNo0155
Film559530YesYes01525
Fabric5510045YesNo01520
Mesh509530YesYes01530
Paper-Aqueous457030YesYes01520
Paper-Solvent509030YesYes01525
HP Photorealistic-Low
Temperature Substrate508030YesYes01540
Synthetic paper 50 80 30 Yes Yes 0 15 40
The various settings mentioned above are described below.
SettingDescriptionIf too lowIf too high
PassesThe number of passes specifies
how many times the printheads
will print over the same area of
the substrate.The amount of ink fired per time
unit is larger and ink has less
time to dry on the substrate. This
may create coalescence and
banding. The boundaries
between passes may be more
visible. However, printing speed
is relatively highColors are vivid, print quality is
high. However, printing speed is
relatively low.
Drying temp.The heat applied in the printing
zone removes water and fixes
the image to the substrate.Print-quality defects such as
banding, bleeding and
coalescence may occur.Thermal marks may be seen on
the substrate; they may appear
as vertical bands in some colors.
The substrate may wrinkle on the
platen, causing vertical banding,
ink smears or substrate jams.
Curing temp.Curing is needed to coalesce the
latex, creating a polymeric film
which acts as a protective layer,
while at the same time removing
the remaining co-solvents from
the print. Curing is vital to ensure
the durability of the printed
images.The print may emerge not fully
polymerized, so that the ink
smears when rubbed with a
finger. The print may appear wet,
after printing or later.The substrate may wrinkle under
the curing module, causing
defects such as bubbles or liner
detachment. The substrate
wrinkles may also cause vertical
banding or ink smears at the
beginning of the following plot.
Heating Airflow Airflow helps to remove the
evaporated water from the print
zone and thus allows more
efficient drying.In general use the substrate family default value.
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							SettingDescriptionIf too lowIf too high
Substrate advance
compensation.Your printer was calibrated at the
factory to ensure that it advances
the substrate accurately when
using supported substrates in
normal environmental
conditions. However, you may
find it useful to adjust the
substrate advance when printing
on unsupported substrates or in
unusual but stable
environmental conditions.Dark lines appear when you use
up to six passes. Graininess
appears when you use eight or
more passes.White lines appear when you use
up to six passes. Graininess
appears when you use eight or
more passes.
Input tensionTension is applied to the
substrate from the input spindle.
It needs to be constant over the
full width of the substrate, thus
substrate load is a critical
operation.The substrate skews and may
become increasingly wrinkled in
the printing zone. Also, substrate
advance may be irregular,
resulting in horizontal banding.The substrate may be
permanently deformed or
damaged. Substrate advance
problems may appear in extreme
cases.
VacuumThe vacuum applied to the
substrate at the printing zone
helps to hold the substrate down
on the print platen, keeping the
distance to the printheads
constant.The substrate may lift up off the
platen and touch the printheads.
This can smear the printed
image, cause a substrate jam or
even damage the printheads.For sticky substrates, friction
could be too high and substrate
advance irregular, resulting in
horizontal banding or irregular
grainy patches.
BidirectionalSpecifies if printheads prints in
both directions, when moving
from left to right and from right to
left.If Bidirectional is selected the
amount of ink fired per time unit
is larger, and therefore print
quality defects such as
coalescence and banding may
occur, especially at the sides of
the plot. However, printing speed
is high.If Bidirectional is unchecked then
the printing is unidirectional and
the speed is relatively low. Tip :
Select bidirectional and increase
the number of passes if
coalescence of banding at sides
appear rather than printing in
unidirectional
High Ink levelMaximum quantity of ink that will
be laid on paper (High ink level
option only available when
number of passes is 10 or more).
The ink quantity is further
reduced by the RIP color profile.If it is not selected, colors may
look washed-outWhen selected there can be
excess of ink and some
problems related to poor drying
and curing may be present TIP:
Select High ink level for backlit
applications or if you want high
color saturation
CutterThe printers built-in cutter can
cut the substrate automatically
between each print.Disable the cutter in the following cases:
●You want to increase the speed of printing.
●You want to use the take-up reel.
●You want to cut the substrate manually.
●The leading edge of the substrate tends to curl and cause
substrate jams.
Auto tracking
(OMAS)The substrate-advance sensor
(also known as OMAS) is located
under the print platen; it can track
the substrate advance
automatically.Disable the sensor in the following cases:
●The substrate is porous and allows ink to pass through to the
platen. Clean the sensor after using this substrate.
●You are instructed to do so by the front panel, because the
sensor is dirty or unable to track this particular substrate.
Here are some more advanced settings, which you are not recommended to change, unless you have
problems that you cannot resolve any other way.
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							Substrate
familyWarm-up
drying
temperature
offsetWarm-up
curing
temperature
offsetCool-down
drying
temperature
offsetCool-down
curing
temperature
offset≤ 10 pass
Minimum
drying power>10 pass
Minimum
drying power
All supported
substrates50000.70.4
The various settings mentioned above are described below.
SettingDescriptionIf too lowIf too high
Warm-up drying
temperature offsetThe temperature that the
substrate in the print zone must
reach before printing starts.Bleeding or coalescence may
appear in the first 200-300 mm of
the print.A longer time to start printing is
required. Vertical banding or ink
smears may occur.
Warm-up curing
temperature offsetThe temperature that the
substrate in the curing zone must
reach before printing starts.The beginning of the print is not
fully dry, or looks oily.Substrate degradation (bubbles,
adhesive detachment) at the
beginning of the print.
Cool-down drying
temperature offsetThe safe temperature at which
the substrate can be under the
drying module without being
damaged. At the end of a job, the
substrate is not stopped until this
temperature is reached.A long time is needed to finish the
print.The substrate at the beginning of
the next print may be damaged,
because it has stopped moving
under too high a temperature.
This case is uncommon.
Cool-down curing
temperature offsetThe safe temperature at which
the substrate can be under the
curing module without being
damaged. At the end of a job, the
substrate is not stopped until this
temperature is reached.A long time is needed to finish the
print.The end of the print may be
damaged if the cutter is disabled.
Minimum drying
powerThe minimum power applied in
the drying module while printing,
so the substrate does not cool
too much in lightly inked areas.A heavily inked area that comes
after a lightly inked area will have
bleeding or coalescence defects.The substrate is damaged in
blank or lightly inked areas of the
print, especially with a high
number of passes.
Select the number of passes
Increasing the number of passes will tend to improve the print quality but reduce the speed of printing.
PassesUni/
bidirSelf-
adhes.
vinylBannerFilmFabricMeshPaper-
Aqueou
sPaper-
SolventHP
Photore
alisticSyntheti
c paper
4BidirNoNoNoNoNoNoNoNoNo
6BidirNoMaybeNoNoNoYesMaybeMaybeNo
8BidirMaybeYesNoNoYesYesYesYesNo
10BidirYesYesNoNoYesYesYesYesNo
12BidirYesYesMaybeYesYesYesYesYesMaybe
16BidirYesYesYesYesYesYesYesYesYes
18*BidirYesYesYesYesYesYesYesYesYes
20 to 28BidirYesYesYesYesYesYesYesYesYes
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							NOTE:* Unlike other printmodes, 18 pass printmode is 1200 dpi x1200dpi input data resolution at
1bpp (1 bit per pixel). Therefore, to generate a 18pass media preset you should start either from another
existing 18pass or from scratch. In the same way, do not clone a 18pass media preset to generate a
preset with a print mode different from 18pass.
Key
●Bidir: bidirectional
●No: not recommended
●Maybe: may be worth trying for extra speed
●Yes: recommended
Check the ink quantity of ink on the substrate
Check if the ink quantities in your media preset are adequate. Look at the plot color patches and check
if one or more of the patches have the right ink quantity using the guidelines below:
1.Too much ink: There are several possible symptoms of this problem.
●The last two or three scales of the plot look the same.
●Vertical bands.
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							●Horizontal bands.
●Coalescence, grain.
Try reducing the amount of ink in your RIP software, then reprint the chart and check again.
Also consider the following tips.
●You might have chosen a media preset which uses excessive ink compared to the one your
substrate allows.
●Consult your RIP documentation to make sure you’re applying the right media preset.
●Consult your RIP documentation on how to lower the total ink limits of the media preset
2.Correct amount of ink: The patch has no defects and increasing amounts of ink result on
increasing color density.
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