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QTR-Quadtone RIP

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

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Re: Question re: differences b/w Epson Driver + QTR density wise

2008-07-28 by Joost Horsten

Frankly, I'm a bit puzzled by what you try to tell us, I conclude 
that QTR resolves your "green" issue but that the brightness/contrast 
do not match your screen image. Right?

First question: did you read Tom Moore's user guide. Second question, 
following that: did you convert your file to either Gray Lab or or 
RRGB lab?. If not then most likely your file is in either AdobeRGB or 
sRGB. This will give wrong results as QTR assumes an image in Lab 
color space.

Joost


--- In QuadtoneRIP@yahoogroups.com, "dellicson" <davinellicson@...> 
wrote:
>
> I have been using the QTR to get rid of the green color cast when 
printing on my Epson 
> R2400. I have making neutral prints and am no interested in toning 
them. To that end, I have 
> only been using the neutral curve. I am wondering why I normally 
have to adjust levels by 
> about 10-15 points in the negative and also use curves to increase 
contrast to get my prints 
> to look right, when with the Epson driver my prints are pretty 
close matches to what I see on 
> my calibrated seen (albeit with the green color cast). Should I be 
mixing at least 2 curves, like 
> 50 cold and 50 warm to get neutral instead?
> 
> Thank you.
>

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