I just finished my first linearization for palladium and while everything went very smoothly, the print of the 21-step shows it could be more linear. I was hoping someone on the forum could help me figure out where I might have gone wrong, or if there is anything I can do to improve on it. I’ve gone through the whole process twice but with roughly the same results.
Here is the 21 step tablet I printed (iPhone pic), along side with bull’s eye for smoothness, which is what I do with every linearization:
Here is the 21-step checker data provided by Piezo DN:
Here is my 21-step checker, which i use with optical density. I might be old school, but optical density makes a lot more sense to me!
Here are the steps I took:
Medium: Palladium + FeO / no Na2
Paper: Hahnemuhle Platinum Rag
Mac OS X El Capitan
QTR Print tool
Colormunki / Color Checker spot mode
1. I printed the LIMITER at my standard printing time. 255 was pure white; 254 had visible tone, which my optical densitometer could not pick up. The manual says that if only 255 and 254, you do not need to limit. So I did not.
2. I printed a COLORMUNKI 129-step target using a renamed copy of the master negative curve. I got a very nice range of grays (see below). Took a reading with the colormunki in color checker, using spot mode. I had to redo it, making sure I was centered each time with the target. Exported the data and pasted in them in the 129STEP_PIEZODN_CGATS_SMOOTHER.xlsb spreadsheet.
There were a number of L* false, especially in the 38 to 40 range so i corrected them all. Separation at top and bottom was adequate so didn’t need adjustment as per instruction.
Here is an iPhone scan of the target, the colormunki patches and screen grab of SMOOTHER excel sheet:
Copied the data in a spreadsheet, etc… and used the linearize-quad applet. A new curve was created with the extension -lin, which I used for printing the above 21-step.
Any help would be greatly appreciated! I really like the whole process, I am finding it very straight forward. But i would love to aim to a more linear output.
I am attaching the colormunki data, along with the -out.txt generated when installing the curve.
Many thanks and best wishes,
ColorMunki.csv (46.4 KB)
Workbook3-out.txt (11.5 KB)