Darkroom in the context of Union City High School (New Jersey)

Mathew B. Brady (c. May 18, 1822 – January 15, 1896) was an American photographer. Known as one of the earliest and most famous photographers in American history, he is best known for his scenes of the American Civil War. He studied under inventor Samuel Morse, who pioneered the daguerreotype technique in America. Brady opened his own studio in New York City in 1844, and went on to photograph U.S. presidents John Quincy Adams, Abraham Lincoln, Millard Fillmore, Martin Van Buren, and other public figures.

When the Civil War began, Brady's use of a mobile studio and darkroom enabled thousands of vivid battlefield photographs to bring home the reality of war to the public. He also photographed generals and politicians on both sides of the conflict, though most of these were taken by his assistants rather than by Brady himself.

A vignette, in graphic design, is a French loanword meaning a unique form for a frame to an image, either illustration or photograph. Rather than the image's edges being rectilinear, it is overlaid with decorative artwork featuring a unique outline. This is similar to the use of the word in photography, where the edges of an image that has been vignetted are non-linear or sometimes softened with a mask – often a darkroom process of introducing a screen. An oval vignette is probably the most common example.

Originally a vignette was a design of vine-leaves and tendrils (vignette = small vine in French). The term was also used for a small embellishment without border, in what otherwise would have been a blank space, such as that found on a title-page, a headpiece or tailpiece.

In photography, toning is a method of altering the color of black-and-white photographs. In analog photography, it is a chemical process carried out on metal salt-based prints, such as silver prints, iron-based prints (cyanotype or Van Dyke brown), or platinum or palladium prints. This darkroom process cannot be performed with a color photograph. The effects of this process can be emulated with software in digital photography. Sepia is considered a form of black-and-white or monochrome photography.

The collodion process is an early photographic process for the production of grayscale images. The collodion process – mostly synonymized with the term "wet-plate process", requires the photographic material to be coated, sensitized, exposed, and developed within the span of about fifteen minutes, necessitating a portable darkroom for use in the field. Collodion is normally used in its wet form, but it can also be used in its dry form, at the cost of greatly increased exposure time. The increased exposure time made the dry form unsuitable for the usual portraiture work of most professional photographers of the 19th century. The use of the dry form was mostly confined to landscape photography and other special applications where exposure times sometimes longer than a half hour were tolerable.

Van Dyke brown is a printing process named after Anthony van Dyck.

It involves coating a canvas with ferric ammonium citrate, tartaric acid, and silver nitrate, then exposing it to ultraviolet light. The canvas can be washed with water, and hypo to keep the solutions in place. The image created has a Van Dyke brown color when it's completed, and unlike other printing methods, does not require a darkroom.