QTR-Quadtone RIP

Hi David,

On 7/16/07, David <dkfreed@...> wrote:
> For the Curve Creator tool:
>
> When I look at the lineariztion tab for a paper (for example, Epson
> Enhance Matte Neutral) I assume I'm seeing a numeric version of
> something similar to Curves in Photoshop.

Yes, pretty similar idea.

>
> I see steps in 5% increments, within a possible range from black
> (100%) to whiten (0%).

It's actually white to black.  The numbers are luminosity values ie. Lab.
96.86 is paper white, 16.15 is dMax.   The numbers are all just readings
from a stepwedge.  You may also see some in density numbers going from
say 0.04 to 1.67 for instance.

What linearization does is apply a correction curve
based on these values.

Roy

>
> And I'm assuming that the numbers are indicating where a particular
> tone will print lighter (such as where the first box is 96.86, instead
> of what I think the 'default' should be which is 100), or where it
> will print darker (such as the last box being 16.15 instead of 0).
>
> Am I interpreting these linearization numbers correctly? That they
> tell the printer to print certain areas of the tonal range lighter or
> darker (or the same)?  And that 100 is black or darkest, and 0 is
> white or lightest?
>
> Thanks, David.
>