QTR-Quadtone RIP

I have a site of Digital Negatives in Japan. 

EPSON stylus 2880 Banding Problem has been reported by some persons. 
A problem arises at the top end and bottom end of a paper. 

It is a print result. 
http://www.digital-negatives.jp/TEST/QTR_PX-5600_plobrem.jpg


Aren't there any good solutions? 



http://www.digital-negatives.jp/blog/?p=786



Regards

http://www.digital-negatives.jp
info@...
Kentaro Kumagai