QTR-Quadtone RIP

lougray1234 <lougray1234@...> wrote:

> **
>
>
> ... The QTR manual offers a way to compensate for dot gain, yet below, you
> seem to be suggesting that the dot gain curve in QTR is not a very
> significant quality factor.
> ...
>
I ignore the concept of dot gain.  Since I work with actual densities, I
don't care how much of that actual density comes from the spread of the ink
as opposed to some theoretical density calculated by the size of the dot
with no spread.  I think you'll find that if you use the simple approach I
use, the pre-linearization curves will be well within what QTR can
successfully linearize.

I do recommend that you graph the pre-linearization Lab L values.  (I open
the spectro results in Excel to do this.)  Don't expect the curve to be
perfectly linear.  Smooth curves linearize the best.  A sharp turn at a
point is the most likely to cause trouble.  These usually do not occur.

Good luck -- just dive in and give it a try.

Paul
www.PaulRoark.com


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