Reference number
ISO 9848:1993
© ISO 2024
ISO 9848:1993
Photography — Source document microfilms — Determination of ISO speed and ISO average gradient
Edition 1
1993-04
Withdrawn
Withdrawn (Edition 1, 1993)

Abstract

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.

General information

  • Status
     : Withdrawn
    Publication date
     : 1993-04
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 7
  • Technical Committee :
    ISO/TC 42
    ICS :
    37.080  37.040.20 
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