ISO 9957-2:2019

INTERNATIONAL ISO
STANDARD 9957-2
Second edition
2019-11
Fluid draughting media —
Part 2:
Water-based non-India ink —
Requirements and test conditions
Fluides à dessin —
Partie 2: Encres aqueuses autres que les encres de Chine —
Prescriptions et conditions d'essai
Reference number
ISO 9957-2:2019(E)
©
ISO 2019

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ISO 9957-2:2019(E)

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ii © ISO 2019 – All rights reserved

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ISO 9957-2:2019(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
5 Test parameters, test conditions and performance . 2
5.1 Basic test concept . 2
5.2 Atmospheric conditions for testing . 2
5.3 Test equipment and accessories . 2
5.4 Testing . 3
5.4.1 Test lines . 3
5.4.2 Measurement of line width . 4
5.4.3 Optical density . 6
5.4.4 Drying time . 6
5.4.5 Adhesion (tape test and eraser test). 6
5.4.6 Erasability/redraughtability . 6
5.4.7 Resistance to water . . 7
5.4.8 Fade resistance . 7
6 Designation . 7
7 Test report . 7
Bibliography . 9
© ISO 2019 – All rights reserved iii

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ISO 9957-2:2019(E)

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 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 10, Technical product documentation.
This second edition cancels and replaces the first edition (ISO 9957-2:1995), of which it constitutes a
minor revision. The changes to the previous edition are as follows:
— references updated;
— minor editorial changes.
A list of all parts in the ISO 9957 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.
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INTERNATIONAL STANDARD ISO 9957-2:2019(E)
Fluid draughting media —
Part 2:
Water-based non-India ink — Requirements and test
conditions
1 Scope
This document specifies the requirements and test conditions for water-based non-India inks intended
for use in draughting instruments and intended for use on natural tracing paper conforming to
ISO 9961, to provide for black line technical drawings.
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 5-2, Photography and graphic technology — Density measurements — Part 2: Geometric conditions for
transmittance density
ISO 5-4, Photography and graphic technology — Density measurements — Part 4: Geometric conditions for
reflection density
ISO 2240, Photography — Colour reversal camera films — Determination of ISO speed
ISO 9177-2, Mechanical pencils — Part 2: Black leads — Classification and dimensions
ISO 9961, Draughting media for technical drawings — Natural tracing paper
ISO 10209, Technical product documentation — Vocabulary — Terms relating to technical drawings,
product definition and related documentation
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10209 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
non-India ink
black water-based draughting fluid that contains a colourant such as (but not limited to) dyes,
dispersions of dyes or microfine organic pigments, but does not contain carbon black as its primary
colourant
Note 1 to entry: A non-India ink does not conform to all the requirements of ISO 9957-1.
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ISO 9957-2:2019(E)

4 Requirements
Drawings made with non-India ink may not necessarily be reproducible using conventional reproduction
techniques (e.g. blueprint, exposure and microfilm printing, photographic reproduction, electrostatic
processing) due to the spectral response of the imaging process and the spectral absorption and
reflectance characteristics of the non-India ink line.
This document specifies the quality requirements of non-India ink lines as follows:
— line width (see 5.4.2);
— optical density (see 5.4.3);
NOTE The measured optical density does not guarantee the reproducibility.
— drying time (see 5.4.4);
— adhesion (see 5.4.5);
— erasability/redraughtability (see 5.4.6);
— resistance to water (see 5.4.7); and
— fade resistance (see 5.4.8).
Lines (and characters) drawn with non-India ink are not as fade-resistant as India ink lines and
consequently cannot be used to produce archival-quality documents. The use of non-India ink
...