Digital BW, The Print

I print a 21 step grayscale according to the instructions with 
PiezoBW ICC manual and the middle section is the same shade from 40% 
to 60%. No matter how I adjust it, the same results happen. This is 
being printed from the Piezotone warm neutral cartridges with Museum 
Black. Has anyone else had this same problem. I just finished 
printing an image from the Library of Congress thinking it may be 
something wrong with my images; and I get the same result.So it isn't 
just a grayscale that printw too light in the midsection, it's 
anything I print.


Your frustrated friend in photography,

Johnny Eades