Piezography Pro curves

InkjetMall Customer Support Piezography Inks & Printing
1

HI,
I’m just setting up Pro inks after migrating from K7. I 'm sending through a series of patches that determine tonal distinction from DMax to paper white. I have no concern about colour, only maximizing microtones. My 100% warm, 100% neutral and 100% cool produced the same results. I like 100% warm. My question is, if I print 100% of one curve, am I shutting down 3 of the available 8 channels, and if so would that result in fewer tonal distinctions? Would that be ostensibly a K4 process?
thanks
Paul

2

Yes technically it would, if you want 100% warm or 100% cool… but not if you wanted 100% Neutral. However just adding back some neutral would gain you…

best,

Jon

3

Ok thanks!
So then my 100% warm, neutral and cool patches could not have been the same.
Guess my eyes aren’t what they used to be.
Regards
Paul

4

What exactly do you mean by the same? Their measurements or their color?

Send pics…

5

I mean colour, and principally in the toe and shoulder of the curve. I used to measure, especially in colour managed workflows, But in K7, tonal distinctions are decimal L* and I never found theses readings reliable and consistent. I just use a ring lit magnifying glass to examine the patches. Here are the scans of the neutral and warm toe & shoulder patches, but I don’t think you can see the nuances of the original. The targets are Same as Source, I send the 256 control signals in increments of 1 from Adobe 1998, the toe section patches are set against 0, the shoulder paper white. If I need to check to see if opening the shadows was at the expense of compressed areas higher along the curve I send patches nested in their neighbours (ie.128 in 129, 129 in 130 etc). I’m sure its not the most precise system but I like its simplicity and I like using my eyes. Its really just to find the best paper/ curve match.

My eye sees the black threshold emerging at level 3-4 and the white threshold at 254 for both of these.

Entrada
Entrada1920×1325 171 KB

6

Yes, definitely not the same. Your sensitivity to luminance is spot on! Could use yourself as a densitometer.
But, the difference in colour is evident in this photo. If you can not see the difference in colour then it’s just blue-yellow sensitivity loss and welcome to aging. I’ve always thought that “Neutral” is overrated and wasted on the youth.

Entrada is not a dMax champion. If you really want to get more out of the bottom end:
Arches88 and Bamboo papers are to die for…

7

Ok yes, sorry, I’m using “colour” in a larger sense, (HSL). When you wrote “Their measurements or their color?” I thought you were asking me if I had read the values or if I’d perceived them with my eye. Yes I do see a chromatic difference, (so still some blue-yellow sensitivity left) but I couldn’t see a difference in tonal distinctions given, as you said, the neutral option should produce more micro-tones.

Thanks for the paper tip!