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download between 0-24 hoursReleased: 1992
ISO 6846:1992
ISO 6846:1992-Photography — Black-and-white continuous-tone papers — Determination of ISO speed and ISO range for printing
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Standard´s number: | ISO 6846:1992 |
Pages: | 9 |
Edition: | 2 |
Released: | 1992 |
DESCRIPTION
ISO 6846:1992
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.