QTR-Quadtone RIP

Mel,

The results you expect are a straight line (or close to) for L* from paper
white to dmax for the linearized target.
If you are getting that then you are sorted, if you are not then there is
something wrong with your steps.

Mike

On 31 July 2011 10:28, Mel <chilterns@...> wrote:

> **
>
>
> I posted this as a reply to another of my posts, but wasn't specific in
> pointing out it was a Linearization question, so here is a better
> description of the query.
>
> I am attempting to create a QTR curve for Epson Premium Semi Gloss paper.
>
> Windows 7
> QTR Ver. 2.7
> Epson 1290
> UT2 inks
> Epson Premium Semi Gloss paper
>
> I am using EPremLuster-neutral-3.qidf as a template.
>
> Workflow
>
> 1. Opened EPremLuster-neutral-3.qidf in Curve Creation.
> 2. Cleared Linearization.
> 3. Saved As EPremSemiGls-neutral-3.qidf.
> 4. Printed off 21step.tif in Graphical Interface on Semi Gloss paper.
> 5. After drying, read the patches.
> 6. Entered the results into Linearization of Curve Creator.
> 7. Tom Moore's Tutorial then says use the Create Curve button to
> create the Linearized version of your curve - there isn't a Create
> Curve button, just a Show Curve.
> 8. In spite of this I Saved the results and expected to see a change
> in the Linearization readings in Curve Creator - there was no such
> change.
> 9. I printed 21step.tif with the Linearized readings saved.
> 10. I re measured the patches and they were different to the non
> linearized 21step.tif as shown below:-
>
> None Linearized Linearized
>
> 100 2.09 2.10
> 95 1.97 1.90
> 90 1.83 1.73
> 85 1.68 1.55
> 80 1.54 1.40
> 75 1.40 1.27
> 70 1.24 1.15
> 65 1.09 1.05
> 60 0.96 0.94
> 55 0.86 0.84
> 50 0.75 0.76
> 45 0.67 0.67
> 40 0.60 0.59
> 35 0.54 0.52
> 30 0.48 0.45
> 25 0.42 0.38
> 20 0.35 0.32
> 15 0.29 0.26
> 10 0.23 0.20
> 5 0.16 0.14
> 0 0.09 0.09
>
> Are these results what I should expect and is the Curve Creator working
> properly, as this version of QTR is not working as Tom's Tutorial describes.
>
> Mel
>
>
>  
>


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