Positive-negative film

Positive-negative film is instant photographic film that generates both a positive print and a negative from a single exposure on a single medium.[1]

Polaroid Type 55, Polaroid Type 665, and Polaroid Type 105 are notable films of this variety.[2]

References
  1. Bockelmann, WD (Jun 1975). "The new polaroid positive/negative film type 105 for ophthalmology (author's translation)". Klinische Monatsblätter für Augenheilkunde (in German). 166 (6): 847–9. PMID 1214411.
  2. Conrad, Fred R. (June 8, 2009). "Shoptalk: Polaroid's Quirky Films". The New York Times. Retrieved June 8, 2009.
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