ISO-6846 Photography -- Black-and-white continuous-tone papers -- Determination of ISO speed and ISO range for printing

ISO-6846 - 2ND EDITION - CURRENT -- See the following: NAPM-IT2.2


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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.

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Document Number

ISO 6846:1992

Revision Level

2ND EDITION

Status

Current

Publication Date

Dec. 15, 1992

Committee Number

ISO TC 42/WG 3