Reference number
ISO 9848:1993
ISO 9848:1993
Photography — Source document microfilms — Determination of ISO speed and ISO average gradient
Edition 1
1993-04
Retirada
ISO 9848:1993
17726
Retirada (Edición 1, 1993)

Resumen

The method of determination specified is based on exposing and processing samples, measuring density from the resultant images to produce a sensitometric curve from which values are taken and used to determine ISO speed and ISO average gradient. Applies to black-and-white camera negative photographic films used for first generation microfilming of source documents at exposure times typically found with tungsten sources.

Informaciones generales

  •  : Retirada
     : 1993-04
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 7
  • ISO/TC 42
    37.080  37.040.20 
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