Digital BW, The Print

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...