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May 2013
Printing
Q With no optical media advance sensor in the 310 and 330 models, does this mean
there is more chance of banding?
Firstly, there is no difference in print quality in the 310 and 330 compared to the 360. As we do not have a heater in the
printzone, media expansion in that area is significantly reduced which means a more stable media advance allowing HP
Latex 310/330 to print robust quality without the OMAS. Additionally the HP Latex Optimizer helps pigments to instantly fix
on the media substrate avoiding quality artifacts caused by a slower curing.
With the HP Latex 310 and 330 It is always recommended to perform the media advance calibration once a new media
profile is created. Recalibration may be needed occasionally after some usage, to adjust to the dynamics of the
environment and the media intrinsic variability. If you do experience any problems during printing you can always change
on the fly, the advance factor and or inter-pass delay offset in the front panel.
The OMAS in the HP Latex 360 Printer is needed for two reasons:
With the high print speeds of the 360 it helps to ensure accuracy in longer advances.
To read the markings for double sided printing.
Q What is the difference between halftone and contone printing?
In Halftone printers, the whole color management and workflow settings are controlled by the RIP so a specific media
profile has to be generated for each RIP and media print mode combination.
In Contone printers, most of the color management and workflow settings are done inside the printer as media profiles are
now on board the printer. This means that the “click to print” time is significantly reduced as RIP processing is now
significantly quicker.
Q Is there any disadvantages going from a halftone to contone printing?
The user won’t be able to select full to light color ink separations to tradeoff between image quality and print cost. However
to solve this the user can using only four colors with any number of passes.
Q Can I make any changes on the fly while printing?
Yes. The most popular adjustment you can make while printing is to change the curing temperature and it will take
immediate effect while printing the current print job. There is an option to save the change and these settings will be
automatically saved to the profile for subsequent jobs. In this menu you can also make changes to advance factor, inter-
pass delay offset and vacuum printing, however these are only recommend for experienced users.
Q Where does the curing temperature reading come from?
The temperature is taken from the inside the curing zone. There are several curing modules, each with their own
temperature sensor that work together to create a consistent and uniform curing temperature across the substrate. This is
due to a pressurized environment where hot air is forced through hundreds of small nozzles to cure the print and then
recycled back through the system to remain efficient.
There are two main advantages of curing by using heated air:
The curing modules can get up to temperature very quickly in under 1.5 minutes
Curing is now done at a lower temperatures and over a shorter time which means printing at higher speeds and
lower energy consumption.
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