Re: How do I use Measure app to determine ink channel limit?
Re: How do I use Measure app to determine ink channel limit?
- Subject: Re: How do I use Measure app to determine ink channel limit?
- From: Peter Merck <email@hidden>
- Date: Thu, 22 Apr 2004 19:08:55 -0400
On Thursday, April 22, 2004, at 01:20 AM, neil snape wrote:
on 21/04/2004 22:04, Steven Kornreich wrote :
I am evaluating a new rip proofmaster 2.0 and during the setup process
it
has me print a chart to determine max ink per channel. Isn't there a
way to
use the measure app and a eye one to measure each patch and determine
at
what point the color is maxed out? If so what is the procedure?
You can actually find the point at which the L lightness and the a* and
b*
channels start to reverse themselves. Where you see a tone reversal or
Chroma shift towards desaturation and or hue that will be the maximum
color
tone (density). It's not an exact science though as this is relative to
the
colour model of how another inkset behaves such as CMYK in a colour
model
Lab which is not linearly uniform.
This was an approach used by many Best Color users before the Premium
version included an iterative method using the max tone method described
above over the classic 20 step density bars in all of the inkset
colors.
Steve
If you can get measurements in L*C*H, you should look for the C values.
As you move up the scale from lightest to dark the C number will go up.
At some point the number will start to go back down.
The inexact science is that once you found the block value with the
highest C value, you have to go back and reduce your ink limit so that
this C value is in the 100% block. This can take several scale proofs.
This is good for CMY.
For K go for the lowest L value.
Pete Merck
Harlan Graphics
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