In the first picture,which is black and white, the lines are very faint traveling left to right,,mostly visible in the center of the images..They are faint though in the picture..I used my Mac and Silver Rag. The lines appear less defined to me.
In the second image, the lines travel up and down,,also very faint, but more precise. This image was printed on Epson double weight mat using the techs computer and his software. These lines appear sharply defined to me
The third image is also BW on Silver Rag but the lines are traveling up and down. These lines appear less defined to me
The last image also shows the banding,,but its very light. If you view it separately it is more visible.
Sometimes I dont even see the banding, but then when staring at it..it shows up sort of resolving itself in front of me..
The direction is due orientation of my Iphone. Sorry!