Alternative Processes

Silver

  • Daguerreotype: silver iodide on silver-plated copper (1837)

  • Calotype: silver chloride on paper (1842)

  • Ambrotype: silver iodide and colodion on glass (1854)

  • Ferrotype: silver iodide and colodion on iron (1856)

  • Albumin Prints: silver chloride and egg white on paper (1860)

Iron

  • Cyanotype: iron chloride and sodium thiocyanate on paper (1842)

Chromium

  • Gum Bichromate: potassium bichromate and Gum Arabic on paper (1880)