Signracer Ricoh MH5220 2,5-7pl

[Peeters]

I work with a Signracer with 2xcmyk Ricoh MH5220 2,5-7 picoliter and have banding problems in our prints. When I print with large dot ( 7 picoliter ) there is no banding. But when I print in de grayscale mode 2,5-7 picoliter ( the finest quality ) there is a lot of banding in the full color parts. Printing with more passes less curing etc. is no solution.
I think the 2,5 pl can't give enough inkt when printing full color parts. Perhaps add 2 heads with Light Cyaan and Magenta ?
Is there someone ho has a solution ?

Thanks