ISO/TS 21139-21:2019
(Main)Permanence and durability of commercial prints — Part 21: In-window display — Light and ozone stability
Permanence and durability of commercial prints — Part 21: In-window display — Light and ozone stability
This document describes the test method for light stability and ozone stability for commercial prints, which are displayed in indoor bright places in or near to windows, especially in display windows with air conditioning. This document also provides guidelines for data analysis. This document is applicable to the various product classes of "commercial prints" that, following the terminology of ISO/TR 19300, include commercial production prints (flyers, brochures), transactional and stationary prints, signage, newspapers and periodical prints, book printing as well as packaging printing. These commercial prints often contain combinations of text, pictorial images and/or artwork. Prints for non-commercial use, including prints used and displayed in consumer home environments and prints exhibited or stored in museum context, are outside the scope of this document. This document is applicable to both analogue and digitally printed matter. Methods and principles apply to both, colour and monochrome prints.
Permanence et durabilité des impressions commerciales — Partie 21: Fenêtre de visualisation — Stabilité à la lumière et à l'ozone
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TECHNICAL ISO/TS
SPECIFICATION 21139-21
First edition
2019-07
Permanence and durability of
commercial prints —
Part 21:
In-window display — Light and ozone
stability
Permanence et durabilité des impressions commerciales —
Partie 21: Fenêtre de visualisation — Stabilité à la lumière et à l'ozone
Reference number
©
ISO 2019
© ISO 2019
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, 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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Use profile . 2
4.1 General . 2
4.2 Environmental light condition . 2
4.3 Environmental ozone condition . 2
5 Test method . 2
5.1 General . 2
5.2 Sample preparation . 3
5.2.1 Outline . 3
5.2.2 Test target . 3
5.2.3 Storage conditions between printing and light or ozone exposure test . 3
5.2.4 Reference samples . 3
5.2.5 Backing of the specimens . 3
5.3 Light exposure . 3
5.3.1 Outline . 3
5.3.2 Spectral power distribution . 3
5.3.3 Light intensity . 4
5.3.4 Temperature and humidity . 4
5.3.5 Duration of the light exposures . 4
5.4 Ozone test . 4
5.4.1 Outline . 4
5.4.2 Apparatus . 4
5.4.3 Test procedure . 4
5.4.4 Test conditions. 4
6 Measurement . 5
6.1 General . 5
6.2 Measurement conditions . . 5
6.3 Calculation of colour difference . 5
7 Data analysis . 6
7.1 General . 6
7.2 Image quality parameter for data analysis . 6
7.3 Environmental conditions . 6
7.4 Estimation of time to reach certain change . 7
8 Reporting . 7
Annex A (informative) Display window type and lighting design . 8
Annex B (informative) Example of test results.10
Bibliography .14
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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on 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 the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 42, Photography.
A list of all parts in the ISO 21139 series can be found on the ISO website.
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 © ISO 2019 – All rights reserved
Introduction
In commercial application of colour prints, displaying the prints under ambient light or artificial
illumination is one of the typical use cases. These prints may fade or otherwise change in appearance
due to various environmental stresses, such as light, heat, humidity, pollutant gas, or biological
weathering, and the combination of these factors. One of the most critical degradations is light fading
caused by bright light which includes some UV components. A typical example of such a case is where
prints are displayed in a display window (see Annex A) and are illuminated with bright light, especially
daylight through window glass.
A test method for light stability of prints by simulating daylight through window glass directly falling
on a print displayed in a window is described in of ISO 18937. The test method described in ISO 18937
has broader application (for example covers a broad range of temperatures) than is required for
this document and so requires some modification. A test method for ozone stability is described in
ISO 18941.
In addition, ISO 18937 and ISO 18941 focus on test method itself, and do not cover translation of test
results into performance in specific use profile which is one of the aims of this document.
TECHNICAL SPECIFICATION ISO/TS 21139-21:2019(E)
Permanence and durability of commercial prints —
Part 21:
In-window display — Light and ozone stability
1 Scope
This document describes the test method for light stability and ozone stability for commercial prints,
which are displayed in indoor bright places in or near to windows, especially in display windows with
air conditioning.
This document also provides guidelines for data analysis.
This document is applicable to the various product classes of “commercial prints” that, following the
terminology of ISO/TR 19300, include commercial production prints (flyers, brochures), transactional
and stationary prints, signage, newspapers and periodical prints, book printing as well as packaging
printing. These commercial prints often contain combinations of text, pictorial images and/or artwork.
Prints for non-commercial use, including prints used and displayed in consumer home environments
and prints exhibited or stored in museum context, are outside the scope of this document.
This document is applicable to both analogue and digitally printed matter. Methods and principles
apply to both, colour and monochrome prints.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 12647-7, Graphic technology — Process control for the production of halftone colour separations, proof
and production prints — Part 7: Proofing processes working directly from digital data
ISO 13655, Graphic technology — Spectral measurement and colorimetric computation for graphic
arts images
1)
ISO 18937:
...
TECHNICAL ISO/TS
SPECIFICATION 21139-21
First edition
2019-07
Permanence and durability of
commercial prints —
Part 21:
In-window display — Light and ozone
stability
Permanence et durabilité des impressions commerciales —
Partie 21: Fenêtre de visualisation — Stabilité à la lumière et à l'ozone
Reference number
©
ISO 2019
© ISO 2019
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, 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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Use profile . 2
4.1 General . 2
4.2 Environmental light condition . 2
4.3 Environmental ozone condition . 2
5 Test method . 2
5.1 General . 2
5.2 Sample preparation . 3
5.2.1 Outline . 3
5.2.2 Test target . 3
5.2.3 Storage conditions between printing and light or ozone exposure test . 3
5.2.4 Reference samples . 3
5.2.5 Backing of the specimens . 3
5.3 Light exposure . 3
5.3.1 Outline . 3
5.3.2 Spectral power distribution . 3
5.3.3 Light intensity . 4
5.3.4 Temperature and humidity . 4
5.3.5 Duration of the light exposures . 4
5.4 Ozone test . 4
5.4.1 Outline . 4
5.4.2 Apparatus . 4
5.4.3 Test procedure . 4
5.4.4 Test conditions. 4
6 Measurement . 5
6.1 General . 5
6.2 Measurement conditions . . 5
6.3 Calculation of colour difference . 5
7 Data analysis . 6
7.1 General . 6
7.2 Image quality parameter for data analysis . 6
7.3 Environmental conditions . 6
7.4 Estimation of time to reach certain change . 7
8 Reporting . 7
Annex A (informative) Display window type and lighting design . 8
Annex B (informative) Example of test results.10
Bibliography .14
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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on 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 the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 42, Photography.
A list of all parts in the ISO 21139 series can be found on the ISO website.
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 © ISO 2019 – All rights reserved
Introduction
In commercial application of colour prints, displaying the prints under ambient light or artificial
illumination is one of the typical use cases. These prints may fade or otherwise change in appearance
due to various environmental stresses, such as light, heat, humidity, pollutant gas, or biological
weathering, and the combination of these factors. One of the most critical degradations is light fading
caused by bright light which includes some UV components. A typical example of such a case is where
prints are displayed in a display window (see Annex A) and are illuminated with bright light, especially
daylight through window glass.
A test method for light stability of prints by simulating daylight through window glass directly falling
on a print displayed in a window is described in of ISO 18937. The test method described in ISO 18937
has broader application (for example covers a broad range of temperatures) than is required for
this document and so requires some modification. A test method for ozone stability is described in
ISO 18941.
In addition, ISO 18937 and ISO 18941 focus on test method itself, and do not cover translation of test
results into performance in specific use profile which is one of the aims of this document.
TECHNICAL SPECIFICATION ISO/TS 21139-21:2019(E)
Permanence and durability of commercial prints —
Part 21:
In-window display — Light and ozone stability
1 Scope
This document describes the test method for light stability and ozone stability for commercial prints,
which are displayed in indoor bright places in or near to windows, especially in display windows with
air conditioning.
This document also provides guidelines for data analysis.
This document is applicable to the various product classes of “commercial prints” that, following the
terminology of ISO/TR 19300, include commercial production prints (flyers, brochures), transactional
and stationary prints, signage, newspapers and periodical prints, book printing as well as packaging
printing. These commercial prints often contain combinations of text, pictorial images and/or artwork.
Prints for non-commercial use, including prints used and displayed in consumer home environments
and prints exhibited or stored in museum context, are outside the scope of this document.
This document is applicable to both analogue and digitally printed matter. Methods and principles
apply to both, colour and monochrome prints.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 12647-7, Graphic technology — Process control for the production of halftone colour separations, proof
and production prints — Part 7: Proofing processes working directly from digital data
ISO 13655, Graphic technology — Spectral measurement and colorimetric computation for graphic
arts images
1)
ISO 18937:
...
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