HP Latex 260 Maintenance and troubleshooting guide - Page 66

The ink smudges when touched, or looks oily, The dimensions of the print are wrong, Tiling issues

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Alternatively, some individual rolls of substrate may have a defective coating. The solution in this case is to use another roll. The ink smudges when touched, or looks oily There are various different circumstances in which these symptoms can be seen. ● When there is a big transition from light to dark colors across the length or width of the substrate Increase the minimum drying power. NOTE: This solution is specific to this problem, and should not be used in other cases, when it could cause further problems. ● When the symptoms can be seen only at the start of the first print after the printer has been idle for some time (especially when the start of the print uses a lot of ink) Increase the warm-up drying temperature offset and the warm-up curing temperature offset. If necessary, increase the stable drying and curing temperatures, or slightly reduce the ink limits. ● When the symptoms can be seen only at the left and right sides of the print Increase the drying and curing temperatures, decrease the overall ink quantity and/or increase the number of passes. ● When the symptoms can be seen only in certain parts of the print that use a lot of ink Increase the drying and curing temperatures, decrease the overall ink quantity and/or increase the number of passes. ● When the symptoms can be seen only in the center of the print Check that all fans are working correctly. ● After reducing the number of passes Increase the drying and curing temperatures and/or decrease the overall ink quantity. ● When the oily finish appears minutes or hours after printing Store the print face-up and uncovered; the effect normally disappears after a while. NOTE: If you decrease the overall ink quantity, you may notice less color saturation. The dimensions of the print are wrong As the substrate is heated during the drying and curing processes, some substrates will shrink (and some may expand) after the image has been printed. This may be inconvenient if the print has to be framed or if several prints are to be to be tiled one next to the other. See The substrate has shrunk or expanded on page 66. Tiling issues The most common problems when printing tiles are as follows. ● Color degradation within individual tiles In many cases, individual tiles are long and contain very large areas of solid colors. This combination (long areas of saturated solid colors) may lead to a degradation of printhead performance, which can then cause degradation of the color inside the tile. To solve this problem, go to the front panel and 60 Chapter 6 Troubleshoot print-quality issues ENWW

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Alternatively, some individual rolls of substrate may have a defective coating. The solution in this case is to
use another roll.
The ink smudges when touched, or looks oily
There are various different circumstances in which these symptoms can be seen.
●
When there is a big transition from light to dark colors across the length or width of the substrate
Increase the minimum drying power.
NOTE:
This solution is specific to this problem, and should not be used in other cases, when it could
cause further problems.
●
When the symptoms can be seen only at the start of the first print after the printer has been idle for
some time (especially when the start of the print uses a lot of ink)
Increase the warm-up drying temperature offset and the warm-up curing temperature offset. If
necessary, increase the stable drying and curing temperatures, or slightly reduce the ink limits.
●
When the symptoms can be seen only at the left and right sides of the print
Increase the drying and curing temperatures, decrease the overall ink quantity and/or increase the
number of passes.
●
When the symptoms can be seen only in certain parts of the print that use a lot of ink
Increase the drying and curing temperatures, decrease the overall ink quantity and/or increase the
number of passes.
●
When the symptoms can be seen only in the center of the print
Check that all fans are working correctly.
●
After reducing the number of passes
Increase the drying and curing temperatures and/or decrease the overall ink quantity.
●
When the oily finish appears minutes or hours after printing
Store the print face-up and uncovered; the effect normally disappears after a while.
NOTE:
If you decrease the overall ink quantity, you may notice less color saturation.
The dimensions of the print are wrong
As the substrate is heated during the drying and curing processes, some substrates will shrink (and some
may expand) after the image has been printed. This may be inconvenient if the print has to be framed or if
several prints are to be to be tiled one next to the other.
See
The substrate has shrunk or expanded
on page
66
.
Tiling issues
The most common problems when printing tiles are as follows.
●
Color degradation within individual tiles
In many cases, individual tiles are long and contain very large areas of solid colors. This combination
(long areas of saturated solid colors) may lead to a degradation of printhead performance, which can
then cause degradation of the color inside the tile. To solve this problem, go to the front panel and
60
Chapter 6
Troubleshoot print-quality issues
ENWW