Codes & Standards - Purchase
ISO 6846:1992
Photography -- Black-and-white continuous-tone papers -- Determination of ISO speed and ISO range for printing
SKU: iso_013355_105550
Published by ISO
Publication Year 1992
2 Edition
9 pages
Product Details
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.