ISO/FDIS 18916

Imaging materials — Photographic activity test for enclosure materials — Processed silver‐gelatin and dye‐gelatin prints

This document specifies the procedure for the photographic activity and dye coupler reactivity tests. This document is applicable to general photographic enclosure materials such as paper, tissue, cardboard, mat board and plastics. It is also applicable to components of photographic enclosure materials such as adhesives and marking substances, including inks, paints, labels, and tape. This document evaluates possible chemical interactions between enclosures and processed silver-gelatin and colour (dye-gelatin) images, and applies to all storage, display, and transport materials used for photographs whether intended for short or long-term use. A modified version of the document is applicable to diazo images. This document may apply to many historic photographic processes. This document does not apply to other non-silver-gelatin imaging systems. It does not pertain to harmful physical interactions such as blocking (sticking together), dye bleed, adhesive migration, or plasticizer exudation. It does not pertain to important criteria of enclosures such as their inherent chemical stability, physical integrity, and workmanship. Passing the photographic activity test (PAT) does not indicate that a material is archival. This term has no clear definition and is not used in this document. Photo-safe storage enclosures and their components are covered in ISO 18902, which supersedes the PAT and includes passing the criteria of PAT.

Matériaux d'imagerie — Test d'activité photographique pour matériaux d'encadrement — Tirages traités à la gélatine argentique et à la gélatine teintée

General Information

• Status: Not Published
• ICS: 37.040.20 - Photographic paper, films and plates. Cartridges
• Technical Committee: ISO/TC 42 - Photography
• Drafting Committee: ISO/TC 42 - Photography
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 06-Jan-2025
• Due Date: 06-Jan-2025
• Completion Date: 06-Jan-2025

Relations

• Revises: ISO 18916:2007 - Imaging materials — Processed imaging materials — Photographic activity test for enclosure materials
• Effective Date: 06-Jun-2022

Standards Content (Sample)

FINAL DRAFT
International
Standard
ISO/TC 42
Imaging materials — Photographic
Secretariat: ANSI
activity test for enclosure materials
Voting begins on:
— Processed silver‐gelatin and dye‐
2025-01-06
gelatin prints
Voting terminates on:
2025-03-03
Matériaux pour l'image — Essai d'activité photographique pour
les matériaux de fermeture — Tirages à la gélatine argentique et
à la gélatine traitées
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 42
Imaging materials — Photographic
Secretariat: ANSI
activity test for enclosure materials
Voting begins on:
— Processed silver‐gelatin and dye‐
gelatin prints
Voting terminates on:
Matériaux pour l'image — Essai d'activité photographique pour
les matériaux de fermeture — Tirages à la gélatine argentique et
à la gélatine traitées
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test conditions . 2
4.1 Principle .2
4.2 Apparatus and materials .3
4.3 Incubation .3
4.4 Measurement .3
5 Image interaction test . 4
5.1 Procedure .4
5.2 Calculation .5
5.3 Requirements .6
6 Stain test . 6
6.1 Procedure .6
6.2 Calculation .7
6.3 Requirements .7
7 Mottle test . 7
7.1 Procedure .7
7.2 Requirements .7
8 Specific procedures . . 7
8.1 General .7
8.2 Adhesives and marking substances .7
8.3 Adhesives with carriers and double-sided adhesives .8
9 Test report .10
Annex A (normative) Modifications for dye coupler reactivity and diazo images .12
Annex B (informative) Colloidal silver image interaction detector . 14
Annex C (informative) Description of mottling .15
Annex D (informative) Applicability of the PAT to non‐silver gelatin‐based photographic
materials . 17
Annex E (informative) Applicability of the PAT to short‐term applications such as display and
transport .18
Bibliography . 19

iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
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
th
the test’s applicability towards 19 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.

iv
Introduction
The use of materials for the storage, display, and transport of photographic records having a long-term value
has necessitated the development of International Standards to specify important considerations in this
field. The important elements affecting the useful life of imaging materials are as follows:
a) humidity and temperature of the environment;
b) hazards of fire;
c) hazards of water;
d) light exposure;
e) fungal growth;
f) contact with certain chemicals in solid, liquid, or gaseous form;
g) physical damage;
h) chemical processing;
i) damage from pests;
j) enclosures and containers in contact (or in close proximity) with the imaging material.
International Standards have been published which specify the material requirements for silver-gelatin
type film (ISO 18901), diazo film (ISO 18905), and vesicular film (ISO 18912). Spe
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ISO /TC 42
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Secretariat: ANSI
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Date: 2024-12-19xx
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Imaging materials – — Photographic activity test for enclosure
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materials –— Processed silver-‐gelatin and dye-‐gelatin prints
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Matériaux pour l'image — Essai d'activité photographique pour les matériaux de fermeture — [More French
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ISO/DISFDIS 18916:2024(en) Formatted: Font: 11 pt, Bold
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spacing: single
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, Commented [eXtyles1]: The reference "ISO 2024" is to a
withdrawn standard
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
Formatted: Default Paragraph Font
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ISO copyright office
CP 401 • Ch. de Blandonnet 8
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CH-1214 Vernier, Geneva
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Phone: + 41 22 749 01 11
between Latin and Asian text, Adjust space between
EmailE-mail: [e-mail]
Asian text and numbers
Website: www.iso.orgwww.iso.org
Formatted: French (France)
Published in Switzerland Formatted: French (France)
Formatted: French (France)
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pt, Line spacing: single
ii © ISO 2024 – All rights reserved
ii
Formatted: Font: 11 pt, Bold
Formatted: Font: Bold
Formatted: HeaderCentered, Left
Contents
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
Foreword . v
Introduction . vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test conditions . 2
4.1 Principle . 2
4.2 Apparatus and materials . 3
4.3 Incubation. 4
4.4 Measurement . 4
5 Image interaction test . 4
5.1 Procedure . 4
5.2 Calculation . 6
5.3 Requirements . 6
6 Stain test . 7
6.1 Procedure . 7
6.2 Calculation . 7
6.3 Requirements . 7
7 Mottle test . 7
7.1 Procedure . 7
7.2 Requirements . 8
8 Specific procedures . 8
8.1 General. 8
8.2 Adhesives and marking substances . 8
8.3 Adhesives with carriers and double-sided adhesives . 9
9 Test report . 11
Annex A (normative) Modifications for dye coupler reactivity and diazo images . 13
Annex B (informative) Colloidal silver image interaction detector . 15
Annex C (informative) Description of mottling . 16
Annex D (informative) Applicability of the PAT to non-silver gelatin-based photographic
materials . 18
Annex E (informative) Applicability of the PAT to short-term applications such as display and
transport . 19
Bibliography . 20

Foreword . v
Introduction . vi
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1 Scope . 1
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2 Normative references . 1 Tab stops: Not at 17.2 cm
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3 Terms and definitions . 1
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4 Test conditions . 2
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iii
ISO/DISFDIS 18916:2024(en) Formatted: Font: 11 pt, Bold
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4.1 Principle . 2
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4.2 Apparatus and materials . 3
spacing: single
4.3 Incubation. 3
4.4 Measurement . 3
5 Image interaction test . 4
5.1 Procedure . 4
5.2 Calculation . 5
5.3 Requirements . 5
6 Stain test . 6
6.1 Procedure . 6
6.2 Calculation . 6
6.3 Requirements . 6
7 Mottle test . 6
7.1 Procedure . 6
7.2 Requirements . 7
8 Specific procedures . 7
8.1 General. 7
8.2 Adhesives and marking substances . 7
8.3 Adhesives with carriers and double-sided adhesives . 8
9 Test report . 10
Annex A (normative) Modifications for dye coupler reactivity and diazo images . 12
A.1 Dye coupler reactivity test. 12
A.1.1 Detectors . 12
A.1.2 Incubation. 12
A.1.3 Measurement . 12
A.1.4 Requirements . 12
A.2 Diazo images .
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