QTR-Quadtone RIP

New curves (warm and cool tones only) for Ultrachrome (K2) inks for
Epson 4000 for three barayta papers:

	HahFAB – Hahnemuhle Fine Art Barayta
	HarFBA – Harman Fiber-Based Alumina
	IlGGFS – Ilford Galerie Gold Fiber Silk

have been added to:

	Files > Curves > Epson 4000 > MiloUC.zip

along with spreadsheets documenting their development.

A puzzler occurred during development of the warm curves.  After
calculating Default Ink Limit (060 for all three papers), I
experimented with lowering the Light Black Limit from 060 to 020 in
decrements of five (nine curves for each paper).  White and black
points remained constant within each set of nine curves, but the
curves "sagged" more and more as Black Limit was lowered.

In the end, I only linearized for Black Limits 060 and 020.  Across
all three papers, both linearizations are essentially identical – both
visually and numerically.  Why would this be the case?  For what it's
worth, the distributed curves use Black Limit 060.

Thank you for the curves!

I am in the process of transitioning from using matte papers to all 
Photo Black papers for color & B&W.  Too much to stock both, in 
multiple sizes, proofing papers and final output papers.

I just ordered rolls of the Hanhemuehle Fine Art Baryta. I have the 
Harman.  I'll test on a 9600 with my K3 inks and see how it goes!

best,
Michael

> I just ordered rolls of the Hanhemuehle Fine Art Baryta. I have the 
> Harman.  I'll test on a 9600 with my K3 inks and see how it goes!

Ummm.  Doesn't the 9600 use UC/K2 inks like my 4000?  Did you mean
9800 or 9880... or is there some way to retrofit K3 to the older
printers?  That would be wonderful news indeed.

   ...Milo

> "milogiacomorambaldi47" <milogiacomorambaldi47@...> wrote:
>
> 
> Ummm.  Doesn't the 9600 use UC/K2 inks like my 4000?  Did you mean
>

I am using wide format refillable carts. I have been sucking the K3 
inks out of Epson 4800 carts and using them in the 9600.

No slot for the Light Light Black, but the results are decent.  Based 
on looking at profiles, about 2/3 of the way toward the K3/9800 
improvements. Quite a bit of improvement in the low L values over the 
K2 inks.  Enough that I probably wouldn't bother to upgrade to a 9800.

I am going to load the K3 Vivid later when I get a chance and see 
what those look like. Those supposedly will kill the heads on the 
older machines, so I am not sure whether I will leave them in. I'll 
just test for now. I might "sacrifice" one og my 7600's and leve it 
in there. ;>)

The QTR profiles worked well by the way - thanks!  I printed out the 
Harman and Hahnemuehle, cool and warm. I like the warm quite a bit, 
very simple.   I haven't had a chance to look at the data yet to see 
about the anomolies that you mentioned.

Best,
Michael