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     :  Withdrawn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
  • Edition
     : 1
    Number of pages
     : 7
  • Technical Committee
     : ISO/TC 42 Photography
  • ICS
     :
    37.080 Document imaging applications
    37.040.20 Photographic paper, films and plates. Cartridges

Life cycle


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