"Ev K" <evko1@...> wrote: > I'm curious what kind of Math is behind curves blending process? ... "horstenj" <j.h.j.h@...> wrote: > The classic theory of density & color blending of printed inks is given by the Neugebauer equations. ... > > But that's still not of much use for profiling/curve creation. ... Being a pragmatist, I have found it easier to download and buy a copy of QuadToneRip <http://www.quadtonerip.com/html/QTRoverview.html> and use the Curve Creator to make the curves. If you look at the graphs of the curves it creates you'll see some interesting things Roy has done that make his partitioning a bit better than what I have been able to do just by hand with other rips. I think Epson also has excellent crossovers, but they don't show a graph of what they've done. I don't think in terms of equations, but visually the graphs in QTR are very informative. One thing I do that I think improves a single QTR partitioning curve is to use a secondary partitioning progression using one of the "toner" channels. So, for example, I have 5 different dilutions/densities of Eboni in my 7800. There is a "gray" set of curves that has 3 inks, and there is a "toner" that uses 2 inks. Both the light inks are light enough to be in the highlights. The work is divided between the 2 partitioning sets. So, the ink limits are cut in half for each. The overlapping helps hide the crossovers and makes the profile smoother and more tolerant of the inevitable inconsistencies that might throw off a profile. Paul www.PaulRoark.com
Message
Re: Inks blending
2010-04-02 by pr_roark