Monochrome
Creating images in one color range, from gray to blue or sepia, where tone replaces hue.
Monochrome photography refers to images made within a single color range, where variations in tone replace differences in hue. Although the word literally means one color, the term covers more than black-and-white photographs: it can include blue cyanotypes, brown or sepia albumen prints, and other single-hue or achromatic images. Photography began as an effectively monochrome medium because early light-sensitive materials registered the intensity of light, not the colors of the scene. As the medium’s working condition rather than a special style, monochrome shaped early photography’s roles in portraiture, scientific study, and the effort to replace hand drawing or engraving with mechanically produced images.
In practice, monochrome photography depends on tonal relationships to describe form, space, surface, and atmosphere, while its particular hue often results from a mix of process chemistry, technical stabilization, and aesthetic choice. Salted paper and albumen prints commonly produced warm reddish-brown, yellowish-brown, or sepia tones, cyanotypes were blue because they used iron salts, and platinum prints were valued for neutral gray-to-black tones formed from platinum rather than silver. Toning could further alter both color and durability: gold toning shifted albumen prints toward purple-brown or blue-black, while sulfide and selenium toning produced rich brown, blue-black, or purple hues by converting silver into more stable compounds. These material qualities also became expressive tools. Pictorialists used gum bichromate, bromoil, soft focus, and pigment-like hues to evoke drawing, painting, or Symbolist atmosphere, while other photographers used blue, sepia, or neutral black-and-white to suggest a particular mood or atmosphere.
The term overlaps with, but is broader than, black-and-white, which usually means achromatic grayscale. That distinction became more visible as color photography gained commercial and cultural presence, making older processes appear as a specific aesthetic choice rather than photography's default condition.