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...thanks to everyone for their replies- we changed from Eco Ultra to UMS because they are the latest edition of Mutoh inks, cheaper, have a wider colour gamut, less solvent (more resin) and more aggressive bond to media/longer lasting. My colleague said that the dampers were not changed when...

(...a bit of background...) ...originally we had a Mutoh Valuejet 1614 running OEM Eco Solvent Ultra inks- it worked very well, pretty much for 5 years (new head fitted mid 2013). In the third quarter of 2013 we purchased a Mutoh Valuejet 1638 running the new OEM Mutoh UMS inks and converted...

...we are running OEM Mutoh UMS inks through a Mutoh bulk system , the heads were changed within the last six months, I assumed that would have included dampers? When we take the cover off to look at the pipes feeding the heads the dampers in the left head look full of ink whereas the dampers on...

This is how our printhead looks after printing- it is clean at start... There are two heads- the other is fine and they share the same wiper- any other ideas or do you think the wiper may still be the cause? Many Thanks.

...Hi all, we run a Valuejet 1614 and a VJ1638, we converted the 1614 from Ultra Eco to UMS when we purchased the 1638. Both printers needed new heads within a year, the cyan head failing in both machines. We reverted back to Eco Ultra in the 1614 and we have no problems, however the 1638 is...

Hi Mark- did you solve this problem, we have the same issue with Mutoh UMS inks... Hi Mark- did you solve this problem, we have the same issue with Mutoh UMS inks...