HP Designjet L25500 Printer Series - Add New Substrate and Image Quality Troubleshooting procedures

HP Designjet L25500 printer series Add New Substrate and Image Quality Troubleshooting
Hewlett-Packard 8
Print-mode parameters
Setting Explanation If too low If too high
Number of
passes
The number of passes
specifies how many
times the printheads
will print over the
same area of
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.
Because larger substrate
advances are required
and ink has to be placed
faster on the substrate,
the boundaries between
passes are more visible.
However, printing speed
is relatively high.
If number of passes < 10
the “High Ink Limit”
setting is not available.
Colors are vivid, print
quality is high, needs
lower curing temperature.
However, printing speed is
relatively low.
Print
direction:
bidirectional
(if checked)
or
unidirectional
(if unchecked)
Specifies if
printheads print 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 relatively high.
If bidirectional is
unchecked, then the
printing is unidirectional
and the printing speed is
relatively low.
TIP: Always select
bidirectional and increase
the number of passes
rather than selecting
unidirectional.
High ink
level: Normal
(if
unchecked),
High (if
checked)
Maximum quantity of
ink that will be laid
on substrate (high ink
limit option only
available when
number of passes is
10 or larger). The ink
quantity is further
reduced by the RIP
color profile.
If high ink limit is not
selected, colors may look
washed-out.
When selected there can
be an 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.