Digital BW, The Print

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However, as Lab L* progresses from 0 to 100, does Lab a* and Lab b* remain steady at 0? Wouldn't it require both a* AND b* to remain at the 0 axis to achieve a true neutral? A slippage of either a* or b* would induce warmth or coolness, yes?

Well, a* and b* don't lie exactly on the warm/cool axis, but b is closer to warm/cool, while a is now referred to as "tint"; tint being Adobe's choice of terms (I tried to argue Tom Knoll out of that abuse of the term, but that's history now) for the "other" axis, perpendicular to color temp. So b is yellow/blue, and a is red/green. 

C. D. Tobie
Global Product Technology Mngr.
Imaging Color Management
Datacolor.com
CDTobie@...

On Mar 24, 2011, at 3:59 PM, "grimmieoldfart" <grimmieoldfart@...> wrote:

> 
> However, as Lab L* progresses from 0 to 100, does Lab a* and Lab b* remain steady at 0? Wouldn't it require both a* AND b* to remain at the 0 axis to achieve a true neutral? A slippage of either a* or b* would induce warmth or coolness, yes?


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