Federico,
Regarding your http://www.paulroark.com/BW-Info/Glossy-Carbon-Variable-Tone.pdf setup on the 1500:
Mixing inks can be by either weight or volume. I believe the specific gravities of the amber base and PK are close enough that you do not need to worry about the very small differences.
Always mix thoroughly in a separate, clean container before loading the cartridges. I use a stirring rod for mixing, not shaking. Any shaking is going to produce some very small bubbles that take a long time to float to the top. I try to let ink sit for several hours even after I've just agitated my wide format printer carts. Little bubbles in the ink will produce a bad nozzle check.
Regarding how to deal with the toner in a QTR profile, the profiles of mine you looked at are typical of what I do.
After I have partitioned the gray (carbon) inks, the toner is set up using a separate curve for the Y-position ink, which is where the light blue toner ink is put. I draw these curves manually, using the "load curve" selection in the Windows GUI. In the *.qidf curve, these are the coordinates shown just above the linearization values.
You can also just use the default "toner" curves in QTR. You will see in the qidf file a section above the linearization data that deals with these. If I use a default "toner" curve this section will show: N_OF_TONER_PARTS=1. The density setting will move the peak of that curve left and right. The ink limit sets the print warmth. There are some other QTR controls that affect the shape of the curve.
My curve uses more toner ink in the deep shadows than the default QTR toner curve. I do not have recommended settings for the QTR toner curves.
I usually set up a 100% carbon curve and then also use that gray/carbon profile as the core of a neutral (Lab B stays close to the paper base throughout the grayscale. Then I use the QTR profile mixing capabilities to set intermediate tones and split tones.
Hope this helps.
Paul
On Tue, Feb 21, 2017 at 8:38 AM, f.cozzi@gmail.com [DigitalBlackandWhiteThePrint] <DigitalBlackandWhiteThePrint@yahoogroups.com> wrote:
Hi Paul,
I decided to follow your document http://www.paulroark.com/BW-Info/Glossy-Carbon-Variable-Tone.pdfI ordered an Epson 1500W (just arrived) and these inks: UTHEXPTPK + ESCBASEPTUC + UTTONER4LB (still on their way). I purchased Ilford Galerie Gold Fibre Silk.How do you mix ink and base? (is the percentage by volume?) Do you inject both into the empty cartridge or use an intermediate container? Do you shake the mix?I think I understood the basic of building an ink-only QTR profile.I've got some flatbed scanner calibration targets (http://targets.coloraid.de/) which I could use to linearize the resulting curve.However I don't understand how to include the toner in the QTR profile. Have you got some documentation on this?If I compare your profiles1. ArchesBW-back-Carbon.qidf2. ArchesBW-back-Neutral.qidfI see that the second has Y (toner) limit = 30 and a Y curveThanks,Federico