What is a microform, and what types of microforms does Princeton collect?

Microform materials exist in one of four forms:

  • Microfilm: 16mm or 35mm film on reels, usually 100 feet in length
  • Microfiche: 4" X 6" or 3" X 5" film sheets, each holding 40 to 98 pages
  • Microcard: 3" X 5" opaque card
  • Micro-opaque: 6" X 9" opaque sheet

Princeton University Library currently collects both microfilm and microfiche formats.  Microcards and micro-opaques are an obsolete format, but the library has collected these formats in the past.

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