I,m assuming you're printing in full color mode but in any event the possibilities are pretty much the same.
To get green you have to be losing magenta somewhere.That would indicate it's probable that you have a restriction in ink flow somewhere along the line.If you have good nozzles then it would argue for ink starvation as the cause also.Your mention that it varies from image to image and happens over density transitions likewise follows that potential cause.
I don't have your machine model but if it uses dampers I would look there first for the problem as magenta clogs and near clogs are ubiquitous these days.Exactly where the greens show up might help distinguish between the dark or light magenta as the culprit and when they show up can be another sign of starvation problems.(eg:1st print right off the bat or somewhere later in the print or print series.)
One other possibility,if what you state as brown is a subtle tint, is that the ink set simply can't generate such from a full color set reliably.It is like trying to generate dead neutral images from color inks.It's a very tricky deal.
Hope this helps with a starting point at least.
Best,
Duane
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Re: [Digital BW] Re: Green stuff in my brown prints
2014-07-23 by pdesmidt tds.net
Try putting a BW adjustment layer or a hue adjustment de-saturation layer right below your solid color fill layer. The idea would be to get rid of all of the color in the image before putting on the fill layer.
On Wed, Jul 23, 2014 at 1:04 PM, dlruckus@... [DigitalBlackandWhiteThePrint] <DigitalBlackandWhiteThePrint@yahoogroups.com> wrote: