ISO/TC 42 Fotografie,
ISO/TC 42 Photography,
ISO/TC 42 Photographie,
ISO Internationale Organisation für Normung,
ISO International Organization for Standardization,
ISO Organisation Internationale de Normalisation
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Media type:
Standard
Title:
ISO 6846
:
Photography; black-and-white continuous-tone papers; determination of ISO speed and ISO range for printing
Other titles:
Früher unter dem Titel: ISO 6846 (1983-12)
Früher unter dem Titel: ISO/DIS 6846 (1991-02)
Photographie; Schwarzweiß-Halbtonpapiere; Bestimmung der ISO-Empfindlichkeit und des ISO-Kopierumfangs
Photographie; papiers noir et blanc pour images à tons continus; détermination de la sensibilité ISO et de l'étendue ISO pour le tirage
Footnote:
Internationale Übereinstimmung mit: DIN ISO 6846 (1994-05), IDT*BS ISO 6846 (1995-12-15), IDT*GB/T 14766 (2008), IDT*KS A ISO 6846 (2004-07-13), IDT*STN ISO 6846 (1995-09-01), IDT*CSN ISO 6846 (1994-03-01), IDT
Description:
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.