Oce Arizona 640 GT User Manual page 167

These inks offer superior adhesion and coverage functionality on most hard plastics commonly
used for signage and industrial applications, including low-cost outdoor materials such as
polyethylene and polypropylene. These inks are characterized by good color gamut, matte
appearance and an ability to cover blemishes and finger marks that are latent on the media prior
to printing. IJC258 are the inks of choice for applications that require superior adhesion to hard
plastics and that can be successfully produced with a smaller overall color gamut, particularly
when printed in the fastest print modes.
Maintenance Considerations
Because the IJC257 and IJC258 ink formulations are more sticky than IJC255 or IJC256, the
printhead area will pick up more debris from media and the environment, so cleanliness is
important. More frequent performance of maintenance may be necessary. Also, printing with
IJC257 and IJC258 ink results in a more sticky ink build-up between nozzle plates so they require
cleaning with a flush-soaked, rather than a dry, lint-free cloth. Ensure that any residual flush is
cleaned from the surface because particulate matter from the environment and from media
surfaces will be re-deposited if there is fluid on the nozzle plates.
IJC256, IJC257, and IJC258 inks require regular spitting in order to keep nozzles clear for jetting
(IJC255 ink only requires spitting with white ink). This spitting occurs in the maintenance station
at set intervals and ejects ink onto an absorbent foam pad. This foam pad must be changed as it
becomes saturated or else the ink being jetted will not be fully absorbed. The pad will repel the
ink that is not absorbed, especially if the pad is incorrectly placed too close to required openings.
This rebounding ink will be re-deposited into the surrounding area and cause soiling of printer
components as well as a greater concentration of ink particles in the air.
NOTE
Read the section on ink safety called "Safety Guidelines for Ink Material" before you handle the
ink.
Managing Your Océ Display Graphics SystemsInks
Your printer is optimized for the specific UV-curable ink supplied by Océ Display Graphics
Systems. The ink is supplied to the printer in 2 liter collapsible bags that are loaded into the
printer by means of quick-change connectors that are bonded into the top corner. To install on
the printer, the bags are inverted and the quick connect couplers are pushed into their
corresponding female coupling. This opens up the flow path for the ink. The bags contain tags
that identifies them to the printer when they are loaded. This allows the printer to ensure that the
correct ink is loaded.
This method of ink delivery has several benefits over bottles or cartridges:
The self-collapsing bags make it easy to see how much ink remains in each bag.
• Virtually all the ink is successfully extracted from the bag by the printer, reducing the otherwise
costly waste of usable ink.
• Ink changes are performed without mess or spills, keeping the environment around the printer
clean.
• Ink changes can be performed during printing - this prevents wasted prints and lost time.
Only qualified inks can be used. If a bag of ink with an invalid serial number, expired use-by date,
incorrect color placement in the ink bay, or if an expired tag is connected to the printer, then the
operator is alerted and an error message is displayed.
The ink delivery system provides the printheads with ink at the appropriate temperature and
pressure. Each printhead has a corresponding ink reservoir on the carriage. Pumps supply ink to
the reservoirs on demand. Sensors in the reservoirs control the level of ink and initiate demand
when required. Ink temperature control is achieved by pumping a coolant fluid through the
printheads. An internal thermostat on each printhead provides temperature feedback.
Océ Arizona 600 Series
Arizona Printer Inks as of 2015
Chapter 10 - Ink System Management 167