microform

Microforms are processed films that carry images of documents to users for transmission, storage, reading and printing. Microform images are commonly about 25 times reduced from the original document size. For special purposes, greater optical reductions may be used.All microform images may be provided as positives or negatives. For use in readers and printers negative images are preferred, that is with a dark background; the low light available to be scattered gives cleaner images.Three formats are common: microfilm (reels), aperture cards and microfiche (flat sheets).
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(n.)
A microscopic form of life; an animal or vegetable organism microscopic size.
  

A generic term for any form, whether film, videotape, paper or other medium, containing miniaturized or otherwise compressed images which cannot be read without special display devices. 1/6/81

Terme générique désignant tout support qu'il s'agisse de film, de bande vidéo, de papier ou d'autres supports, contenant des images miniaturisées ou réduites par d'autres procédés, qui ne peuvent être lues sans dispositifs spéciaux de visualisation. 1/6/81

Microforms are photographic images that are 20 to 150 times smaller than the original" (Balough 1993:17). It is generally produced on film that has a life expectancy of 500 years, commonly called microfilm.
 

microform
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