Foreword

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This document was prepared by Technical Committee ISO/TC 42, Photography.

This second edition cancels and replaces the first edition (ISO 18916:2007), which has been technically revised.

The main changes are as follows:

This revision resolves issues regarding the scope of ISO 18916:2007 and its applicability to photographic images that are not comprised of silver and/or gelatin-based materials. This revision removes these types of materials from the scope of the document. The following additional changes have been made:

— A new Annex D addresses and warns against the use of the test outside of its intended scope, e.g. as a general screen for oxidants and reductants and applied to all collection types. This annex also addresses the test’s applicability towards 19^th century photographic processes and digital hard copy such as inkjet, dye sublimation, and electrophotography.
— A new Annex E includes guidance on the interpretation of test results for short-term applications, such as display and transport.
— Language addressing the use of the test for consumer vs. museum applications has been added to the introduction.
— The standard no longer specifies an annual testing requirement. Instead, the standard recommends testing by batch or lot, and requires materials be re-tested upon changes in formulation or supplier change, or upon other changes in production of the product.
— Test modifications for chromogenic (dye coupler) and diazo images have been moved to a normative annex, as these are optional additional test methods for specific types of photographic processes and are not requirements of the test.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.