Fabrizio Levati wrote:
Nikolay, you are right about the TIL but what I am trying to understand is why, starting from the same characterization data (FOGRA39) and using the same TIL and a similar Black generation rule, I am not able to obtain a result similar to that produced by different profiling software.
Without knowing exactly what algorithms other software uses, it's not possible to really explain the differences, and without analysing profiles from the same data set in some detail, it's not possible to suggest how to get similar black generation, if it's possible at all.
The problem is that I find almost impossible to manage the CMY inks level the way I want. The same TIL, as you say, can lead to a black curve that ends at the upper right corner of the graph, only if you can limit/define the amount of CMY versus K along the whole range from 0 to 100%.
Yes, they are not the easiest of controls, but at the moment I can't think of a way to improve them without a substantially different approach to the whole problem. I'm not sure it's such a good goal to try and match some other package though. It's better if you are trying to get a particular result out of a print.
In the list there are experts that can say if I'm wrong saying that we are speaking about what is normally called "Black Width"...
My understanding of "Black width" is that it refers to how much influence the black generation setting has away from the neutral axis. Traditionally I think this means that a "narrow" setting has minimal black and maximum CMY away from the neutral axis. Currently in Argyll I don't have a "width" control of this sort, the black generation is "wide", ie. it affects all of the color space. Graeme Gill.