New PiezoDN Curve(s) for Pro ink

Dear PiezoDN and Piezography Pro (ink) customers. Here is a pre-release “gold master” PiezoDN curve for the Pro inkset for all 8 channel x8xx (K3, K3v) printers.

Note, this master curve is for UV process currently. Mileage may vary for silver, but test it anyway.

x8xx-PiezoDN-Pro-Master.quad (8.1 KB)

I’m really happy with this curve and it’s proving to be equal and almost better than the K7 selenium PiezoDN base curves. What is unique about this curve structure is that it utilizes the higher UV blocking of the warm inks (M, LM, Y channels) vs the less UV block of the cool inks (C, LC, LK). Pro inks (which have nearly equal paper Luminance values in Dark, Medium, and Light) actually function much more like K7 inks in the UV-process world allowing for a more even spread and less noise.

Over the coming weeks I will update the full curve roster for Pro. If anyone has a pro set and wants to send me printed targets (exact size as the target uploaded) for their various printing processes, I would be more than happy to take them. I do not have the time to bust out every process under the sun myself but if you send me a target I’ll make a custom calibration and also publish that for all PiezoDN customers.

Piezography-700step-DTP70.tif.zip (1.4 MB)

Also of note, this curve (should) work on non-ultra Pictorico (and Fixxons) film, please test. :love_you_gesture:

best,
Walker

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Technical details of the R&D Process:

  • 1.3mL of 50Pd-50Pt Malde-Ware printout ammonium process solution.
  • .16mL of Tween/Glycerin combo (this helps with noise, I highly recommend it for all platinum/palladium printing)
  • 175 Units (about 3412 on the PPM2 sensor machines) of UV light
  • RH of 46% at all times during coat and dry of paper.

I understand that many (if not most) PiezoDN customers will be doing the develop out method. In my experimentation, building master negs with our print-out method here is actually closer to other people’s develop out method because our exposure unit is weird and causes very dense negatives for develop out but “standard” negatives for the print-out. That being said, as all darkrooms are different, you will most likely need to calibrate.

best,
walker

Thanks Walker. This may be a silly question, but I want to make sure: PK or MK?

-Mike

always PK for dig negs!

This one is for the R2000 and P400 printers with Pro ink.: P400-PiezoDN-Pro-Master.quad (8.1 KB)

This one is for the the R2880 (and older) printers with Pro ink: Rx8xx-PiezoDN-Pro-Master.quad (8.1 KB)

Small formats like these put out slightly less ink than the larger formats. So these two curves have been modified slightly from the original master to put out a bit more density throughout the tonal range. This ideally gets the first target you print closer to linear for whatever UV process you are calibrating.

Walker,

For clarity on my part, you would like the physical print made in my process with the gold master .quad with Pro inks on (in my case) a 7880? This would use the beta 0.38-5.3.0 release.

I should also have added that you want to use the DTP70 700 step target?

And which .xmls should be used with this gold master ~ref.quad?

Sorry for all the questions…

Please print with QuadtoneRIP on this one and evaluate. I think you will be pleasantly surprised.

Yep. Print what I uploaded above, exact size of the target (do not print the target less than 100% or more than 100% scale in Print Tool). It’s fine to leave extra white space on the printed paper though.

best,
Walker

Thank you.

Negative printed and sitting in the drawer to rest overnight.

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Walker,
I’m printing with the Malde/Ware system, pretty much identically to your technical details as listed in the second entry above. I’d be happy to print the target with a negative out of my 3880: Pro Inks: Pictorico film - if that would be helpful. It sounds like you have that covered, but let me know.

Mark

This master was built just for that, so I think we’re good w/ that environment.

Thanks though!
Walker

Hello Walker, I’ve used Tween reasonably often for developing out palladium depending on the paper but am interested in your use of a Tween/glycerin combo. Can you provide some more details (how much Tween and what strength, and how much glycerin). Is standard supermarket glycerin good to use? Thank you! Julian

Would I be right in thinking this can be mapped to 8 corresponding channels in a 9900 as a starting place?

Best forum for this: http://discourse.sewanee.edu

best,
Walker

Yes. you are correct,

Walker