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  • Status :  Withdrawn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
  • :
    ISO/TC 42
    Photography
  • 37.080
    Document imaging applications
    37.040.20
    Photographic paper, films and plates. Cartridges

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)

Keep up to date with ISO

Sign up to our newsletter for the latest news, views and product information