The issue seems to be Canon driver or firmware issue/bug.
Here's the workaround that I figure out after some trials (expensive trials with all the expensive papers and inks
)
I've started my experiment with all printing in Canon Print Studio Pro, Media type: Canon Photo Paper Luster, Size: A3+
Print 1 (B&W):
Resize image to 18" x 12" and add canvas to make it 19" x 13"
Print borderless
then do roller cleaning, print head alignment, ticking prevent paper abrasion, ..etc
Print 2 (B&W):
Resize image to 18" x 12" and add canvas to make it 19" x 13"
Print borderless
Banding still exist Print 2 (color):
Resize image to 18" x 12" and add canvas to make it 19" x 13"
Print borderless
Banding still exist
Print 3 (B&W):
Resize image to 18" x 12" and add canvas to make it 19" x 13"
Print with border
Banding still exist Print 4 (B&W):
Resize image to 18" x 12" and add canvas to make it 19" x 13"
Add light grey text at the edge of image
Print borderless
Banding now move to the light grey text. I can now have a good picture print with border
The issue doesn't seem to be hardware related but the driver/firmware capability in handling edge printing where it encounter pure white data after the edge, eg. the border.
I am not sure if any canon pro 1 users encounter the same issue as me. It seems canon pro 1 isn't that popular and common.
I have seen this on both Mac OS Lion and Mountain Lion and I have the latest driver installed.
I would feedback this to my local canon technical service/support.