QTR-Quadtone RIP

--- In QuadtoneRIP@yahoogroups.com, "oksen" <oksen@...> wrote:
>
> I'm getting slight banding especially in the both ends on a A6 
> landscape print on epson matte HW. I have tried a lot of combinations 
> including increasing shadow darkness and gamma with no result. I print 
> in 2800dpi as 1440dpi results in even more banding. Same image printed 
> in Photoshop at the same time has absolutely no banding, so it must be 
> related to the rip. On semigloss I had the same problme plus the ink 
> never dries, so that's why I now go for the matte paper.
> Any suggestion highly appreciated, as this RIP seems to be able to get 
> rid of the colorcast produced by photoshop on the 1800.
> thanks in advance,

One banding "cure" for QTR that works well for me is to add a "micro
jaggie" border to your print. The dither in the version of the GIMP
print engine used in QTR doesn't deal with uniform areas well. If you
randomly make about 1/3 the pixels on all four edges of the image
white, the dither settles down remarkably well. Your original image
has to be at least 300dpi when you do this, or you're going to see
"teeth" around the edges.