Sheet film

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Sheet film is large format and medium format photographic film supplied on individual sheets of acetate or polyester film base rather than rolls. Sheet film was initially supplied as an alternative to glass plates. The most popular size measures 100 mm × 130 mm (4 in × 5 in); smaller and larger sizes including the gigantic 510 mm × 610 mm (20 in × 24 in) have been made and many are still available today.