Detail

notation
d
English
Published

Other Properties

English preferred label microfilm reel Published
English notation d Published
English definition Consists of a strip of photographic film wound onto an unenclosed flanged holder (or reel). Microfilm reels require manual threading when used in readers and reader-printers and require equipment that is adapted for their use. Film lengths are usually 100 ft. (approximately 30 m.) or less. For microimages produced by filming textual and graphic materials, the most common film widths are 35 mm. and 16 mm. and reduction ratios commonly range from about 10:1 to about 20:1. Sixteen millimeter film with effective ratios of either 24:1 or 48:1 is most often used for COM (Computer-Output-Microfilm) microimages. Published