QTR-Quadtone RIP

Clay - thank you too for the help. I will be updating this thread with
my progess
Sean

--- In QuadtoneRIP@yahoogroups.com, "clayharmon47" <clay@...> wrote:
>
> Sean,
> 
> 
> What Michael said. He knows this stuff better than anyone, I think.
> 
> I didn't realize that what you are attempting to do is use the 
> linearization approach like you would for prints. As he said, you 
> have to keep straight what you are trying to linearize - and that is 
> you are trying to match a specific %gray on screen to the same %gray 
> on the final print. The negative is the go-between, and the it is 
> essentially 'backwards' from the print. More negative density equates 
> to less print density and vice-versa. So if your print is too dark at 
> a specific density on screen, you need to ADD density to the negative.
> 
> It is not that easy, but once done, gives beautiful results.
> 
> I'm sorry I forgot to put that essential piece of information in my 
> original post, but except for that, it does describe the basic steps 
> you will need to go through. 
> 
> Clay
> 
> 
> --- In QuadtoneRIP@yahoogroups.com, Michael Mutmansky <michael@> 
> wrote:
> >
> > Sean,
> > 
> > And in response to your initial questions, you cannot do anything 
> linear.
> > Nothing in this process acts in a truly linear fashion. In my 
> experience.
> > That's why you'll have to do some testing and a bit of iteration.
> > 
> > You cannot use the linearize function to produce a resultant UV 
> density
> > except through a back-door approach of testing, and then taking the 
> results
> > and applying them to the file as an adjustment curve.  That will 
> get you
> > pretty close, though.
> > 
> > You can't use the reflected density values directly.  You need to 
> go through
> > the inversions and the Y-N formula to produce an adjustment curve 
> that will
> > properly linearize the negative.
> > 
> > 
> > ---Michael
> >
>