Reference number
ISO 6846:1992
ISO 6846:1992
© ISO 2024
International Standard
ISO 6846:1992
Photography — Black-and-white continuous-tone papers — Determination of ISO speed and ISO range for printing
Edition 2
1992-12
1992-12
ISO 6846:1992
13355
Published
(Edition 2, 1992)
This publication was last reviewed and confirmed in 2020.
Therefore this version remains current.
Abstract
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
WithdrawnISO 6846:1983
-
Now