Photography -- Black-and-white continuous-tone papers -- Determination of ISO speed and ISO range for printing
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.
| SDO | ISO: International Organization for Standardization |
| Document Number | ISO 6846 |
| Publication Date | Not Available |
| Language | en - English |
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| Committee | ISO TC 42/WG 3 |