Black and white photographs are often more expressive and able to convey emotions than colour photographs. The absence of colour distills the subject to it’s essence highlighting forms, patterns, tones and movements to tell a story. Using coloured filters, as in the darkroom, skies can be made black, contrasts enhanced and the ambience in the image controlled to express what ever the mood is that you felt when you captures the picture with the camera. Using different chemicals in the darkroom it is also possible to add some tone to black and white images. Gold, ferric sulfate and selenium are some of the effects that also can be simulated digitally to add warmth to highlights or cool off the shadows.