Layer masks and channel mixers

Adjusting colors within a layer in photoshop, I was able to achieve an image similar to those in old scrapbooks that have a reddish tint to them. This was accomplished by adjusting the red layer in the channels of the image.




I'd like to do more with black and white images where one portion is colored, or maybe one portion shows just certain colors. By duplicating layers, creating a hue/saturation layer, and desaturating the top layer, a layer mask can be added and by painting black over the hue/saturation layer, you can reveal the layer below (the original color photo). In this way I was able to make Pete black and white, and leave the "Flavor Burst" water bright and colorful.