A darkroom is a workspace for the processing of light-sensitive materials. Darkrooms have been used for black and white photography since the late 19th century, but their popularity has waned with the introduction of color, Polaroid, and digital photography. The most familiar black and white processes involve developing the image, stopping the development, fixing the image, then washing and drying it. Why is it safe to use red or amber lighting in a darkroom? Discuss
Source: The Free Dictionary