Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Michael King" 
<drmrking@...> wrote:
>
> How are you separating L* ?

I am using the Gretag color chart as reference. If I convert the Lab 
file to grayscale via Photoshop menu mode conversion, I will always 
preserve the L* values, no matter what grayscale space is configured 
by default in my color settings.  Equally the info pallet will 
display the exact L* values of the Gretag chart regardless of the 
grayscale space configured in my color settings.  If I deactivate the 
a* and b* channels the file brightens visibly on the screen, even 
though the info palette continues to display the same L* values.  But 
if the lab file is now converted to grayscale ( with a* and b* 
channels deactivated)  or if the L* channel is dragged into another 
file as an alpha channel, (even to another Lab file),  the info 
palette will now display the L* values as they appear on the screen, 
that is at least L*10 brighter.  

Eugene