Examine the individual RGB channels in the Channels Palette and remember which channel appears to be the best Black & White image as a starting point for your conversion.
Return to the Layers Palette then make a Channel Mixer Adjustment Layer.
Set the “Output Channel” to the channel which you determined was the best as a starting point (see step #2) and check the “Monochrome” option.
Begin to adjust the individual Red, Green and Blue sliders to obtain the best Black & White appearance possible and press OK when you're satisfied with the image.
In the Layers Palette, click on the Background Layer to make it active.
Make a Hue/Saturation Adjustment Layer.
Change the “Edit” pull-down from “Master” to one of the available listed colors.
Start by moving the “Hue” slider to change the tone of the image. When you're satisfied, follow this by adjusting the “Saturation” slider then the “Lightness” slider until you obtain the desired tonality.
Continue by choosing another color in the “Edit” pull-down and repeating step #9. Try this with all the colors listed. Some will give you significant changes while others will not.
Steps #8, 9 and 10 may be repeated for other colors if desired.
When you're satisfied with the image, click OK.
Finnish by “Flattening” the image if you prefer and then saving the newly created Black & White image. Remember to use the “Save As” command so you don't overwrite the original color image.
