Digital BW, The Print

Hi Jm;

I've had a fairly persistent banding problem with QTR on my 7600. 
Sounds like yours is worst though. I can almost get rid of it 
completely if I print at 2880, Better, and Adaptive Hybrid 
dithering. test those settings & see if they help

Steve Karafyllakis


--- In 
DigitalBlackandWhiteThePrint@yahoogroups.com, "joemulligan_68" 
<joemulligan_68@y...> wrote:
> 
> Hi Nick,
> 
> Thank you for your feedback.  I simply use the curves that are 
> loaded with the Windows version of QTR/QTRgui.  Yesterday, I 
printed 
> some images of rock formations with sky and clouds above.  What I 
> notice is that the highlights show some sort of "dither banding" 
> while with the shadows (rocks) this banding or dithering is 
> camouflaged.  It is highly obvious in high key images.  This 
banding 
> always runs parallel to the print head.  I have ruled out paper 
> alignment and nozzle problems because this problem only happens 
with 
> QTR.  It sometimes happens on some images with Imageprint but I 
have 
> never seen it printing the same files with IJC/OPM nor the 
standard 
> Epson driver.   
> 
> I just want to know if anyone has the same problem.  I can try and 
> relinearize as you suggest but this problem happens with every 
curve 
> that is loaded with QTR.
> 
> Any other thoughts?
> 
> JM
> -- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Nick H. 
Nugent" 
> <nghin@p...> wrote:
> > 
> > Hi JM,
> > 
> > I did a slew of profiles for multiple papers and inksets and 
> actually 
> > got one that gave serious posterization in the bright skin tone 
> > areas. All I did was rescanned the target, entered linearization 
> > data, and regenerated the curve and the problem went away.
> > 
> > I have no idea that might have caused the problem, but with the 
> > problem profile I noticed a sharp dip just about where I noticed 
> the 
> > banding or posterization. This could not have been caused by my 
> > reading an incorrect target because the dip is very sharp.
> > 
> > It could have been the data I entered manually and made a 
mistake 
> > somewhere. For the rest of the profiles data are entered using a 
> more 
> > automated process to reduce possibility for errors.
> > 
> > I hope this help,
> > --nick
> > 
> > --- In 
> DigitalBlackandWhiteThePrint@yahoogroups.com, "joemulligan_68" 
> > <joemulligan_68@y...> wrote:
> > > 
> > > ... I also use 1440 super and better as well as Ordered 
Dither.  
> No 
> > > matter what settings I use QTR always bands. I am wondering if 
> what 
> > > I am mistaking for banding is actually visible dithering but I 
> > > tried adding 2% noise and 5% and this problem is still 
evident.  
> I 
> > > am certain this is not a nozzle problem like I mentioned in my 
> > > previous post...