Digital BW, The Print

Another thing that can cause banding is the way the driver handles 
transitions across some parts of the tonal scale; particulalry the 
blend between K and the next lighter shades. This can be exacerbated 
by some curves, while others work fine. Next time you run into the 
problem, try using two or even 3 curves for similar papers, and 
mixing them in varying ratios. I'm not sure if it will help with the 
3MK setup, but it might.

Steve


>
> Steven,
> 
> Thanks for sharing this. I did print using single channels only and 
I
> did notice some differences in the banding. Some are worse than 
others.
> 
> But before swapping MK PK and GLO, I did another test print on EEM
> using the MIS ALPHA curve.
> 
> Strangely NO banding appears.
> 
> This banding issue is a real mystery.
> 
> I'll keep your suggestion in mind for when (if) it returns.
> 
> Denis
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Steven
> Karafyllakis" <stevekphoto@> wrote:
> >
> > 
> > Denis;
> > 
> > I have yet to run across an R1800 that prints perfectly in all 
> > channels. The OEM ink and driver are kicking out 6 channels of 
ink, and 
> > may hide the flaws in one or two channels. If you do 
a 'calibration 
> > mode' printout It will show you the weaker channels, and perhaps 
you 
> > can shift your inks to better-printing channels if you are stuck 
with a 
> > particulalry bad one now. 
> > 
> > Steven Karafyllakis
> > 
> > 
> > >
> >
>