Dark photos printing green

[fi0D45]

I'm having a problem with printing dark photos. They all have green streaks through them.

I am using photoshop and saving the file as a TIFF . I am printing in CMYK and using a UV flat bed printer.

If anyone could highlight what I might be doing wrong I would be so grateful!

[Norman Sanders]

In the sample provided, which I assume is a photograph of the printed sheet, the numbers for the four sites would not present a green component.

L value: the tone level with white at 0 and black at 100

a value: a measure of Magenta/Green with a positive number indicating Magenta

b value: a measure of Yellow/Blue with a positive number indicating Yellow  

Since green (minus value in the  a  channel) does not appear in any of the samples, you may consider this as probably an optical effect, an illusion, called simultaneous contrast. One detailed explanation of the phenomenon may be found in a book by Dan Margulis: “Photoshop Lab Color” second edition.  You can also google the term.