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QTR-Quadtone RIP

Index last updated: 2026-04-28 23:12 UTC

Message

L values comparison

2015-11-05 by peter@...

Hi All,

Getting back into QTR after months on another photographic project.


I am using Print Tool with a 3800 and 9900, also just updated to El Capitan with no problems so far.

After some help from Roy - thank you.


I did my first curve today with the following: i1 Pro (old device UVcut) running i1 Profiler licensed version.

I used: Richard Boutwell's i1-QTR-Step-21x4-random TARGET and his i1-profiler-QTR-21x4-random.txt script.


I printed out the target with Print Tool - No colour Mgmt. left to dry. I loaded the target into i1 Profiler and measured using spot, it went without a problem. Saved the file then proceeded with the Linearisation using Diallo QTR Workflow Level 2.


Again all went OK and the new curve UKpk- 9900- Canson Platine Fibre Rag- Neutral is sitting in the QTR Applications folder and duly shows up when printing from my Quad9900 set up in Print Tool.


I looked at the two graphical displays, one without linearisation and one with. The latter is no where near a straight line, in fact apart from 2/3 tiny shifts in the "L" its the same as the former.


I printed a target - I like the Northlight Images test image that Keith Cooper provides - with my new profile and one with the UKpk-raw-neutral. I cannot see a difference.


Did the same routine and double checked everything, same result.


Any ideas or help would be appreciated - thank you.


Peter




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