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.
Document identifier
ISO 6846:1992
Title
Photography -- Black-and-white continuous-tone papers -- Determination of ISO speed and ISO range for printing
ISO Category
TC 42/WG 3: Sensitometry, image measurement and viewing
Publication date
1992-12-01
International Relationship
BS ISO 6846:1992 * BS ISO 6846:1992
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