Reference number
ISO 9378:1993
ISO 9378:1993
© ISO 2024
International Standard
ISO 9378:1993
Photography — Vesicular microfilm — Determination of ISO speed and ISO range
Edition 1
1993-09
1993-09
ISO 9378:1993
17070
Published
(Edition 1, 1993)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
The principle of the method specified is exposing and processing samples as specified, obtaining density measurements from the resultant images to produce a sensitometric curve from which values are taken and used to determine ISO speed and ISO range. The method applies to vesicular microfilms which have their principal spectral sensitivity in the region of 350 nm to 450 nm and are used to produce negative-appearing images from positive originals and positive-appearing images from negative originals.