Special precautions for RISO color inkjet printers

1, Maintain the device to keep it free of dust (including paper dust).

– Dust and paper dust adhering to the nozzles of the print heads may result in a misfire.

– Clean internal paper paths with a vacuum cleaner to remove dust (including paper dust) at

 eriodic intervals – for example, when replacing waste ink tanks (periodic inspections). Clean more or less frequently, depending on your specific operating conditions. The amount of paper dust that accumulates in the machine will depend on the type of paper used.

– Never use an air duster, since doing so will raise paper dust and causes misfires.

2, Ink storage

– Store ink cartridges in the specified conditions. Follow the [first in, first out] principle when

 removing ink cartridges from storage, and use ink promptly.

– Do not store ink cartridges in environments that may degrade the ink. Degraded ink is more likely to cause nozzle misfires and other problems.

3, Precautions for use of inks

– Do not shake the ink cartridges before using.

 Shaking the bottle will generate air bubbles into the ink solution, making nozzle misfires more

 likely.

– Do not refill with ink.

– Check ink left unused for extended periods after ink cartridges are opened to make sure it

 remains usable.

 Ink left in ink cartridges for extended periods after the cartridges are opened will oxidize and

 degrade. Try to use up ink as quickly as possible after ink cartridges are unsealed.

 Using degraded ink may result in problems that require the replacement of the print heads or

 other ink-handling parts (misfiring nozzles).

4, Precautions for anticipated periods of extended disuse

– Ink in the internal ink passages may degrade or dry out over the time, resulting in nozzle misfires and other problems. In the worst cases, misfiring nozzles will require replacing the print heads.

– To avoid these problems, we recommend operating the printer now and then.

5, Precautions for use of the printer after long storage

– If print head cleaning is not performed before use, misfiring nozzles or other printing problems

 may occur.

 Start by checking for any misfiring nozzles.

– If the nozzles are misfiring, perform head cleaning.

 In some cases, the head cleaning procedure will need to be repeated several times to clear the

 print head nozzles.

– If the nozzle condition does not improve after the nozzles are checked for misfiring and strong cleaning is repeated several times, the print heads may need to be replaced.

6, Differences between display and print colors

– The colors on prints may differ slightly from the colors seen on your display device.

– The difference in the colors may be attributable to various factors, including differences between RGB and CMYK color systems, the RIP color system, display device settings, etc.

7, Never touch the surfaces of the print head nozzles.

– Scratching the print head nozzle surface or dust adhering to the print head nozzle surface may

 cause printing problems. Never wipe the print head nozzle surface.

– In the worst cases (misfiring nozzles), such problems may require replacement of the print heads.

 To prevent problems, avoid touching print head nozzle surfaces during machine maintenance. Be careful to avoid scratching print head nozzle surfaces with tools or parts when working near the print heads.

8, Protect the print heads from any physical shock.

– The print heads are extremely fragile. Handle them carefully, and avoid dropping or striking them.

9, Selection of paper type

– Use only the specified paper type. Using the wrong paper may result in poor adhesion of ink to

 the paper.

– If you choose to use a paper product not specifically recommended by the manufacturer, first

 perform a printing test. Papers producing paper dust will cause misfires.

– Ink that fails to adhere to the paper may be left on the transport roller or transfer belt, smudging subsequent prints.

– Internal parts contaminated by ink may require more frequent maintenance. To avoid these

 problems, select your paper carefully.

10, Maintenance of proper operating conditions

– Ink viscosity affects the ink ejecting performance of inkjet printers.

– Ink viscosity increases with lower temperatures, making ejection problems like nozzle misfires

 more likely. Use the printer only under the specified operating conditions.

11, Cleaning wipe

– To wipe off ink from the printer, use the dust- and fiber-free materials. Never use ordinary tissue paper.

– Fibers and paper dust from cleaning materials may cause nozzle misfires and other problems.

– Never wipe the print head (the head surface). Let the machine clean the head by itself.

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