Digital BW, The Print

Thanks Roy.  

In the early stages I took a look at the curves that QTR was 
generating.  That's when I realized there was more than one approach 
to creating a curve set.

I handn't really thought much about the amount of ink the paper could 
take.  The 3000 has ink dots the size of baseballs compared to the 
newer printers and managing the entry of the black ink was one of the 
stumbling blocks I had.  I may think about the ink levels more on the 
next iteration.




--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington" 
<roy@h...> wrote:
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "gulstenek" 
<keving@d...> wrote:
> > Antonis-
> > 
> > Thanks for the very detailed answers.  It's very helpful - 
confirming 
> > some things I'd thought and giving me more the think about.
> > 
> > Having gone through the first paper with a lot of expirementation 
the 
> > following papers, as you suggest, are very straight forward when
> > based 
> > on the existing profile.
> > 
> > I don't want to leave the impression that creating the curves is 
hard 
> > - it's not.  It's just that having arrived at a very good result, 
I 
> > am, for some reason, compelled to worry whether I could make it
> > better 
> > :)
> > 
> 
> 
> Hi Kevin,
> 
> I think Antonis' description is very much the general idea.
> 
> The difficulty I think is mainly figuring how much ink the paper can 
handle.
> You've got to decrease a lighter ink as you increase a darker ink.  
But if
> you come down too fast relative to the new ink coming in you'll get 
a plateau
> or dip in density and linearizing doesn't fix this.  Its hard to 
compare rates
> because a 5% increase from 10 to 15% might not correspond to a 5% 
decrease
> from 75 to 70%.  It would depend how the curve settings map into ink 
quantities.
> 
> With QTR, access to the raw level allows the voodoo math to work :)  
I just make
> sure the amount of ink is always increasing as well as the balance 
of light vs
> dark ink is always increasing.  Then linearization can straighten it 
all out.
> 
> Roy