QTR-Quadtone RIP

Hello everyone,

This is my first post here. Fist of all, I have already found a lot of information in this group, thanks for you work!

I'm working with QTR to make profiles for Digital Negatives adapted to silver print.
I am experimenting a problem with a particular profile that require a little bit as usual. This is a simple profile in two parts :

K : density 100 / limit 32%
LK : follow K / limit 32%
M : follow K / limit 32%

LLK : density 16 / limit 34%
LM : follow LLK / limit 34%
Y : follow LLK / limit 34%

C and LC are not used, global Ink limit is set to 100 / no black boost.

I have created this profile with the GUI in windows and then installed on my mac. The problem is that when I open it with QTR view, I see that the Ink limit for LLK/LM/Y is now 27% and the limit for K/LK/M is 31%.

I don't think it is an issue between Window and Mac as the text file looks Ok when imported to the mac. Perhaps the problem is the ink limit in QTR as the total ink should be more than 100% in this profile.

Have one of you experimented such a problem? Is there a way to say to QTR that I need more than 100% ink?

Thanks for you help

Luco

Hello Roy,

Thanks for you answers,

I think I understand now : if I set the maximal ink amount of the light part of the curve to 34, it doesn't mean that this amount will go to 34 because the other part of the curve is already active too, right?

There is one more thing I don't understand : I set the max amount of Ink to 32 for the other part of the curve (the part that work until 100%) and if I look at the profile with QTR View, the max value is 31. Does it mean that there is still ink from the fist part of the curve at the value 100%?

I tried this with black boost set to "0" and also set to the same value as K with the same result. I have to set the max value to 32,5 to see a value of 32 in QTR View.

I know this is not a big problem, I can work with it but I just want to understand how does it work.

Luco