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 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

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
Foreword
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electrotechnical standardization.
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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
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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.
iv © ISO 2019 – All rights reserved

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.
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
...