QTR-Quadtone RIP

Hi bill_iverson

 I realized that I had been wrong.

*For paper(positive print) the L* values start out Highlight to Shadow

LINEARIZE="96.74 93 88.19 82.72 77.16 71.92 66.64 61.62 56.83 52.7 48.63 44.81 41.48 37.83 34.41 31.15 27.96 24.93 22.87 21.09 18.95"



*For Altanative(Negative print) the L* values start out Shadow to Highlight

LINEARIZE="26.3 27.6 31.2 35.8 39.6 42.8 46.2 47.9 50.4 52.9 56.4 60.5 64.1 67.2 70.5 73.4 75.9 78.6 81.3 86.3 95.0 "


I don't try about "Optical density" (ect 0 ~ 1.3)@I don't have a density meter.
If you're using "density meter", 
Please convert the "Density" and "Lab"

Companding Calculator
http://www.brucelindbloom.com/CompandCalculator.html

And "Linearization Checker" is useful
http://shopping.netsuite.com/c.362672/site/techdocs/Custom_Profiling_Package.zip

Regards,
Kentaro Kumagai




--- In QuadtoneRIP@yahoogroups.com, "bill_iverson_washington" <bill.iverson@...> wrote:
>
> I've recently been told that QTR can directly linearize profiles for digital negatives by entering 21-step density values read from a print made from the digital negative, so that the density values start out high and decrease (e.g., 1.30, 1.24, 1.18 ... 0.05).  Sure enough, when I enter these values in the linearization tab, QTRgui Curve Creation generates new Ink Curves for the profile, which seem to be modified from the previous Ink Curves generated simply with the ink description.
> 
> My question is how do I know if my installed QTR has the newest version of this digital negative linearization feature?  A posting by Kentaro Kumagi in June 2012 (msg. 10358 Re: "starter profiles" for digital negatives) provides a link to a "fixed patch for Win QTR ... given by Roy [Harrington]" which provides this capability.  I never installed such a patch,a but the fact that my QTR linearization tab will accept density values running from high to low suggests I somehow acquired the capability (I think).  I believe I have QTR 2.7.2, downloaded in the past year, but determining just what I have is hard since "QTR 2.7.2" apparently still uses the 2.7.0.0 QTRgui Windows interface.  My QTR "About" panel and hard drive info indicate I have the following modules:
> QTRgui 2.7.0.0 file date 3/27/2010 size 10,574,404
> QuadToPrinter 2.7.2.0 file date 8/14/2011 size 827,392
> QuadProfile 2.7.2.0 file date 9/8/2011 size 917,570
> 
> Sorry to pose such a tedious question, but using the wrong linearization feature or using it in the wrong way would make my already somewhat time-consuming and expensive efforts to create digital negative profiles for PtPd printing even so.  Thanks.
>