Black and White in Photoshop I - Black and White in Photoshop CS4 and Photoshop Lightroom - page 138

Step 2: Change the Blend mode of this new adjustment layer from Normal
to Color. This option is one of 20 or so available blend modes from the drop-
down menu in the Layers palette. This blend mode will allow us to adjust
the hue and saturation simultaneously. (If we think about this technique in
photographic terms, this layer will act as our Filter layer, or the Remapping
color layer.)

Hint:
It is always a good idea
to name your layers!
Double-click on the
letters in the Layers
palette that spell out
“Hue/Saturation” and
type in a name like
“Color Mapping”. This
will help make it easy to
remember what each
layer does when you
come back to the image
later.

Step 3: Make another Hue/Saturation adjustment layer by clicking on the
Adjustments panel, or adjustment layer icon at the bottom of the Layers
palette and choosing Hue/Saturation a second time. This time, however, we
will pull the saturation slider all the way to the left, reducing the saturation
to -100 (in photographic terms again, this will be the “Film” layer, or simply
“convert to gray”).
Step 4: Now we are ready to create the black and white conversion
dynamically by playing with the individual color channels within the Hue/
Saturation dialog box's drop-down menu. Here's how …

Step 5: Double-click the adjustment layer thumbnail icon on the middle layer
in the stack, which is the “Filter” layer, or the i rst layer you created and set to
color. This will reopen the Hue/Saturation dialog box. Adjust the Hue slider
and notice how you are interactively changing the spectral relationships
between the colors as they translate into black and white. Isn't that cool?

Step 6: You can also play with the Saturation slider and make further
adjustments to give more emphasis to tonal values within the image.