Converting to Black and White With Black and White Adj Layer
Photoshop CS6 Tutorial
How to Convert a Color Image to Black and White with a Photoshop Adjustment Layer
Within Photoshop there are several ways to convert a color image to black and white. This method allows you to adjust the grayscale values and is a non-destructive process.
Open a color image in Photoshop (File > Open).
Click the Create New Adjustment Layer icon and select Black and White....
The adjustment layer dialog box appears.
Adjust the sliders to modify your image.
You can add a tint to your image by clicking the Tint checkbox, then click the color rectangle. Change the values in the Color Picker. Press OK to accept the settings.
You can change your settings simply by double-clicking the Black & White adjustment layer icon.