Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@y..., chameleon@i... wrote:
.......
 Brightness is not the same as 
> whiteness in paper tech talk.  Whiteness is measured on the "L" scale 
> of LAB, whereas brightness is a measure of reflectivity (how much 
> light is reflected off the paper). 

But Robert, isn't the L reading the "grayscale" component and not the color? 
Hence it is expressing the same thing as brightness in different terms (% light 
reflectance vs position on a grayscale). I would imagine that "whiteness" 
would need to take into account _color_ info not just light-to-dark. Color info is 
only contained in the "a" and "b" of Lab.

???

Antonis