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ISO 6846:1992

Photography — Black-and-white continuous-tone papers — Determination of ISO speed and ISO range for printing

Dec 3, 1992

General information

90.93     Jun 5, 2025

ISO

ISO/TC 42

International Standard

37.040.20  

French   English  

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Published

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Scope

Pertains to all conventional silver-halide contact and enlarging papers used for continuous-tone or pictorial photography. The method is based on exposing and processing samples, performing density measurements from the resultant image to produce a sensitometric curve from which measurements are taken and used to determine ISO speed and ISO range values. Annexes A to C deal with the relationships between the paper range and the effective density range of the negative, log exposure range and contrast, and log exposure range and average gradient.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 6846:1983

NOW

PUBLISHED
ISO 6846:1992
90.93 Standard confirmed
Jun 5, 2025

REVISED BY

ABANDON
ISO/WD 6846

ABANDON
ISO/WD 6846