Thanks for the reply's.
As I said, I am a rank beginner but I enjoy trying to make all this work.
Here is what I found out. My artist friend was kind enough to loan me two of his scanned print files for me to experiment with. The first is 5844 X 2902 pixels/51MB. I printed it 16.5" x 23" with no lines. The second is 5106 x 3756 pixels/13.1MB It printed fine at 14.5 X 20...no lines.
My digital photograph shot with my D90 is 4288 x 2848 and 9.2 MB. print size is 8" x 10". printed with lines at 1400 speed unidirectional.
I can't find a reference to the "bits" question. Not sure if they are 8 or 16. When I open the files and press Command I, there is no information presented, the photo just changes color presentation.
I have printed fast, slow, one direction and both directions....still lines. I can print the same picture on an HP Photojet at 8x10 (same system)with no lines.
I have included scanned images of the same picture printed with the 9600 and the HP Photojet. Notice the lines and blemishes on the 9600 photo. Don't quite understand why the 9600 would print two scanned files perfectly and then not print my D90 files.
By the way...I got good nozzle checks before each printing.
Thanks.....
I have included