QTR-Quadtone RIP

Hi all, 

The question of the day: how do you choose the black boost
while creating a curve? 

I usually do the following: BB = IL + 10 (IL:
Ink Limit) because this is what I see on provided curves in QTR. But is
there a particular way to determine it? 

Have a nice day, 

Sylvain 

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Sylvain M. <sylvain@...> wrote:

**
>  The question of the day: how do you choose the black boost
>
> while creating a curve?
>

The Black Boost is actually the black ink limit.  If you go over the ink
limit, the dmax is reduced.

I usually do the following: BB = IL + 10 (IL:
> Ink Limit)
>

I often do the opposite:  "Ink Limit" = Black Boost (the real ink limit) -
10

You don't need to use the boost at all, but it helps put a very steep curve
on the final part of the black ink curve. By lowering the nominal black ink
limit the second black 21-step test print (usually done via a second
Calibration Mode print) printed at the K ink limit (slider on the
Calibration Mode GUI), the K 21-steps are spread out more and make it
easier to more accurately set the relative density of the dilute inks.

 But is there a particular way to determine it?
>

How far down to set the ink limit from the boost seems a bit subjective.
 Some guides I use include, first, where you can no longer see a visual
difference is steps, set the limit.  Or, where the difference between steps
drops to one density unit, set the limit.  Then use your measuring device
(spectro of flatbed) to set the Boost where the actual density ceases to
increase continuously.

Paul
www.PaulRoark.com


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