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.
ISO 9848:1993Stage: 95.99
Corrigenda / AmendmentsWithdrawn
ISO 9848:1993/Cor 1:1994
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