This International Standard describes test methods for determining the long-term dark storage stability of
colour photographic images and the colour stability of such images when subjected to certain illuminants at
specified temperatures and relative humidities.
This International Standard is applicable to colour photographic images made with traditional, continuous-tone
photographic materials with images formed with dyes. These images are generated with chromogenic, silver
dye-bleach, dye transfer, and dye-diffusion-transfer instant systems. The tests have not been verified for
evaluating the stability of colour images produced with dry- and liquid-toner electrophotography, thermal dye
transfer (sometimes called dye sublimation), ink jet, pigment-gelatine systems, offset lithography, gravure and
related colour imaging systems.
This International Standard does not include test procedures for the physical stability of images, supports or
binder materials. However, it is recognized that in some instances, physical degradation such as support
embrittlement, emulsion cracking or delamination of an image layer from its support, rather than image
stability, will determine the useful life of a colour film or print material.
ISO 18909:2006 history
2022ISO 18909:2022 Photography — Processed photographic colour films and paper prints — Methods for measuring image stability
2006ISO 18909:2006/Cor 1:2006 Photography — Processed photographic colour films and paper prints — Methods for measuring image stability
2006ISO 18909:2006 Photography - Processed photographic colour films and paper prints - Methods for measuring image stability