Digital BW, The Print

PS  More info: I saw the problem in a 6x9" print on hp Premium Plus 
glossy with a starting print resolution of about 400dpi and then 
tried upsampleing to 600dpi.  I also tried printint in both "Best" 
mode (600dpi) and "Max DPI" (600x4800dpi I believe).

mark

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley" 
<tyler@t...> wrote:
> More info. What driver? Quads or color? Never heard of this with a
> x600 printer so it should be able to be resolved. No such problems
> here with a 9600, same technology.
> Tyler
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Mark Hahn"
> <markhahn2000@y...> wrote:
> > Ok, ...I guess they say that when something sounds too good to be 
> > true...
> > 
> > Have made a bunch of b&w prints with my new hp 7660.  All the 
smooth 
> > tone digital images print out near perfectly, but from film scans 
> > the "woven" dither pattern somehow blends with the random scatter 
of 
> > the grain and produces a hidious pattern of perceptible soft 
> > gridlines which almost look like microbanding.  Looking at the 
prints 
> > under a loupe shows that it is some interaction between the grain 
> > pattern and the dither pattern however.  The problem manifests 
itself 
> > most in something like a face in a portrait or other smoothly 
shaded 
> > objects and vanishes in more texture rich images or grain free 
> > images.  By comparison, the posterization issues with my 1160 
seem 
> > rather mild now.  I've tried upsampling to printer resolution 
prior 
> > to printings which changes the output, but doesn't correct it.  
> > Anyone else seeing this?  Anyone have a solution?  Unless I 
figure 
> > out a work around I will be returning the printer as the output 
from 
> > T400CN scans are not suitible for hanging in a gallery.
> > 
> > thanks for any advice,
> > 
> > mark