Specific Material Designation:	aperture card aperture card microform cartridge microform cartridge microfilm cassette microfilm cassette microfilm reel microfilm reel microfiche microfiche microfiche cassette microfiche cassette micro opaque micro opaque microfilm slip microfilm slip other other
Polarity:	positive positive negative negative unknown unknown mixed polarity mixed polarity
Dimensions:	non required value non required value 8 mm (microfilm) 8 mm (microfilm) 16 mm (microfilm) 16 mm (microfilm) 35 mm (microfilm) 35 mm (microfilm) 70 mm (microfilm) 70 mm (microfilm) 105 mm (microfilm) 105 mm (microfilm) 3 x 5 in. 3 x 5 in. 4 x 6 in. 4 x 6 in. 6 x 9 in. 6 x 9 in. 9 x 19 cm 9 x 19 cm unknown unknown other other
Reduction ratio:	low reduction low reduction Normal (16x - 30x) Normal (16x - 30x) high (31x - 60x) high (31x - 60x) very high (61x - 90x) very high (61x - 90x) ultrahigh (91x -) ultrahigh (91x -) unknown unknown varies varies
Specific reduction ratio	">
Colour:	monochrome monochrome colour colour unknown unknown varies varies
Emulsion on film:	silver halide silver halide diazo diazo vesicular vesicular unknown unknown mixed emulsion mixed emulsion not applicable not applicable other other
Generation:	first generation (Master) first generation (Master) printing master printing master service copy service copy unknown unknown mixed generations mixed generations
Base of film:	safety base safety base not a safety base not a safety base unknown unknown not applicable not applicable