color 
   color-related effects 
      tone 
         Halftones 
electronic images 
   Digital images 
photographic materials 
   photographic film 
      Safety film 
   photographic paper 
      Printing-out paper 
photographs 
   photographs by form 
      negatives 
         negatives by process 
            Calotypes 
            Photogenic drawings 
            gelatin silver negatives 
               Gelatin dry plate negatives 
      positives 
         Direct positive prints on paper 
         direct positives 
            Daguerreotypes 
            Tintypes 
            diffusion transfer prints 
               Dye diffusion transfer prints 
         photographic prints 
            photographic prints by process 
               Albumen prints 
               Chromogenic color prints 
               Cyanotype process 
               Gelatin silver prints 
               Palladium prints 
               Pigment prints 
               Platinum prints 
               Salted paper prints 
               Silver-dye bleach prints 
               pigment prints 
                  Carbon prints 
                  Gum bichromate prints 
                  Oil prints 
                  oil prints 
                     Bromoil prints 
         transparencies: photographic 
            photographic transparencies by process 
               Autochromes 
   photographs by technique 
      photographs by picture-taking technique 
         stereoscopic photographs 
            Anaglyphs 
            Stereographs 
      photographs by processing or presentation technique 
         Contact prints 
         Photograms 
         manipulated photographs 
            Composite photographs 
photography and photographic processes and techniques 
   photographic processes 
      Additive color processes 
      Collodion processes 
      Subtractive colour processes 
      bichromate processes 
         Fresson 
      collodion processes 
         Dry collodion process 
         Wet collodion process 
         wet collodion process 
            Ambrotypes 
      diffusion transfer process 
         dye diffusion transfer process 
            Internal dye diffusion transfer process 
      direct positive processes 
         Bayard‘s process 
      interference processes 
         Lippmann process 
      iron processes 
         Kallitype 
      pigment processes 
         Carbo process 
      subtractive color processes 
         silver-dye bleach process 
            Cibachromes 
   photographic techniques 
      photographic processing and presentation techniques 
         Solarization 
printing and printing processes and techniques 
   printing processes 
      photomechanical processes 
         photomechanical processes: intaglio 
            Photogravure 
visual works by medium or technique 
   collages 
      Photocollages 
   montages 
      Photomontage 
   photomechanical prints 
      Woodburytypes 
      photolithographs 
         Collotypes