Black and White in Photoshop II - Black and White in Photoshop CS4 and Photoshop Lightroom - page 148

Note:
Keep a keen eye out
for posterization when
pulling colors to extreme.
6. Now that you have spent a couple of minutes setting a nice conversion,
let us save your hard work. Just to the left of the OK button is a preset
options toggle - click it to “save settings”. These “BLW” settings reside
in the presets directory of the application folder - because they are
small i les and can easily be emailed or posted on the web for others
to use.
7. The same Preset button allows you to load other settings, or access one of
the many presets that ship with CS4. Let us take a look at what they do.
Green i lter: By adding more lightness to the green and yellow regions,
this i lter brightens foliage and leaves skies and other areas fairly neutral
Blue i lter: By adding more lightness to the blue, cyan and magenta
regions, this i lter dramatically lightens sky and water while darkening
leaves and foliage