CET White Ink Issues

[signheremd]

Need Help. We replaced our original white Ink head several months ago as we lost many nozzles and it was banding badly. New head printed well at first, but then suddenly only the middle half printed during test prints. Now we have nothing printing and ink does not come out when priming. We have tried using flush to recover, but are not seeing any progress. We had been printing white patches each day to keep it in use. Ink is all new. Machine is not used on weekends. 500 series inks and ricoh heads. Appreciate any advice

 

[Christian @ 2CT Media]

Sounds like an air issue. There might be air getting in to your head.

 

[jeffdpia]

Sounds like an air issue. There might be air getting in to your head.

Sounds like air in the line, bleed the line until it streams without air burping out of the line. Refer to the manual, this should be done for all colors periodically.

 

[Case]

Need Help. We replaced our original white Ink head several months ago as we lost many nozzles and it was banding badly. New head printed well at first, but then suddenly only the middle half printed during test prints. Now we have nothing printing and ink does not come out when priming. We have tried using flush to recover, but are not seeing any progress. We had been printing white patches each day to keep it in use. Ink is all new. Machine is not used on weekends. 500 series inks and ricoh heads. Appreciate any advice

99% alcohol.... Soak the bottom of those white heads with the lint free wipes........ I have same ink, heads, machine.... Have done it a bunch of times and I get the heads firing again........ The alcohol works better then the flush solution......

Case

 

[MelloImagingTechnologies]

Case has a good solution.
Was a bad batch of white coming from Asia this crazy year.
Another way to try to resolve before replacing is flush by finding a cap you can place under the head so the jets are underwater in a small amount of alcohol and instead of pushing flush through you can attempt to pull alcohol into your syringe.
Bruce