This standard was last reviewed and confirmed in 2020. Therefore this version remains current.
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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|std 1 61|
|std 2 61||Paper|
A standard is reviewed every 5 years
Stage: 90.93 (Confirmed)
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