All black and white
photographs was originally, or white and black. Even after color
film was readily available, black
and white photography continued to dominate for decades, due to its low cost and
its "classic" photographic look. It is important to note that some monochromatic
pictures are
not always pure blacks and whites,
but also contain other colors depending
on the process. The cyanotype
process produces an image of blue and white, for example. The process
of albumin, first used over 150 years, produces brown tones.Many photographers continue to produce black and white images, often due to the permanence of well-established files processed silver halide-based materials.
Some of the color digital images are processed using a variety of techniques to create black and white, and some manufacturers produce digital cameras that have only monochrome.
