ISO/PRF 19252

Plastics — Determination of scratch properties

ISO 19252:2008 specifies a method for determining the scratch properties of plastics under defined conditions. The method involves making a scratch by moving a hard instrument (scratch tip) of specified geometry under specified conditions of load and speed across the surface of a test specimen and then assessing the result. The method is used to investigate the behaviour of specified types of specimen under the scratch conditions defined and for classifying the type of scratch of specimens within the limitations inherent in the test conditions. It can also be used to determine comparative data for different types of material by means of a so‑called scratch map in which the types of scratch behaviour for each set of test conditions of test load and test speed are determined using the basic method of constant-load testing, and also by means of the so‑called critical normal load determined using an alternative method of linearly increasing load testing. The method is suitable for use with uncoated and unlacquered thermoplastic moulding materials and thermosetting moulding materials. The method specifies the preferred dimensions for the test specimen and the preferred scratch-tip geometry.

Plastiques — Détermination du comportement à la rayure

General Information

• Status: Not Published
• ICS: 83.080.01 - Plastics in general
• Technical Committee: ISO/TC 61/SC 2 - Mechanical behavior
• Drafting Committee: ISO/TC 61/SC 2 - Mechanical behavior
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 10-Apr-2025
• Completion Date: 10-Apr-2025

Relations

• Revises: ISO 19252:2008 - Plastics — Determination of scratch properties
• Effective Date: 06-Jun-2022

Standards Content (Sample)

International
Standard
ISO 19252
Second edition
Plastics — Determination of scratch
properties
Plastiques — Détermination du comportement à la rayure
PROOF/ÉPREUVE
Reference number
ISO 19252:2025(en) © ISO 2025
ISO 19252:2025(en)
© ISO 2025
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
ii
ISO 19252:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 5
5 Apparatus . 5
5.1 Test machine .5
5.1.1 General .5
5.1.2 Frame .5
5.1.3 Scratch tip.5
5.1.4 Test load .5
5.1.5 Test speed .6
5.1.6 Test specimen support .6
5.1.7 Force indicator .6
5.1.8 Scratch-tip displacement gauge .6
5.2 Instruments for measuring the test specimen dimensions .6
5.3 Monitoring and inspection devices (optional) .6
5.3.1 Monitoring device.6
5.3.2 Scratch inspection device .6
6 Test specimens . 7
6.1 Shape and dimensions .7
6.2 Preparation .7
6.2.1 Moulding .7
6.2.2 Inspection of specimens and measurement of specimen dimensions.7
6.3 Number of test specimens .7
6.4 Conditioning.7
7 Procedure . 8
7.1 Test atmosphere .8
7.2 Scratch test .8
7.2.1 General .8
7.2.2 Scratch tip.8
7.2.3 Test load .8
7.2.4 Test speed .9
7.2.5 Test direction.10
7.2.6 Clamping .10
7.2.7 Testing .10
7.2.8 Recording of data .10
7.2.9 Monitoring of scratch behaviour and inspection of the scratched surface
(optional) .10
8 Expression of results .11
8.1 General .11
8.2 Determination of type of scratch behaviour .11
8.3 Creation of scratch map .11
8.4 Determination of critical normal load . 12
9 Test report . 14
Annex A (informative) Photographic illustrations of different types of scratch behaviour .16
Annex B (informative) Example of a test machine . 17
Bibliography .18
PROOF/ÉPREUVE
iii
ISO 19252:2025(en)
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 61, Plastics, Subcommittee SC 2, Mechanical
behaviour.
This second edition cancels and replaces the first edition (ISO 19252:2008), which has been technically
revised.
The main changes are as follows:
— the Scope has been updated to specify materials suitable for use with the test method defined in this
document;
— the list of normative references (Clause 2) has been updated;
— the terms and definitions clause (Clause 3) has been updated;
— in 6.1, permission to use flat sample has been added.
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.
PROOF/ÉPREUVE
iv
International Standard ISO 19252:2025(en)
Plastics — Determination of scratch properties
1 Scope
This document specifies a method for determining the scratch properties of plastics under defined
conditions.
The method defined in this document is used to investigate the behaviour of specified types of specimens
under the scratch conditions defined and for classifying the type of scratch of specimens within the
limitations inherent in the test conditions. It can also be used to determine comparative data for different
types of material by means of a so-called scratch map in which the types of scratch behaviour for each set of
test conditions of test load and test speed are determined using the basic method of constant-load testing,
and also by means of the so-called critical normal load determined using an alternative method of linearly
increasing load testing.
The method is suitable for use with the following range of materials.
— thermoplastic moulding, extrusion and casting materials, including filled and rei
...

2025-01-28
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ISO/TC 61/SC 2/WG 2
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Date: 2025-04-10
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Plastics — Determination of scratch properties
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Plastiques — Détermination du comportement à la rayure
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numbers
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PROOF
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or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO between Latin and Asian text, Adjust space between
at the address below or ISO’s member body in the country of the requester. Asian text and numbers
ISO copyright office
CP 401 • Ch. de Blandon netBlandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Formatted: French (Switzerland)
EmailE-mail: [e-mail]
Formatted: French (Switzerland)
Website: www.iso.orgwww.iso.org
Formatted: French (Switzerland)
Published in Switzerland
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pt, Line spacing: single
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ii © ISO 2024 2025 – All rights reserved
ii
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Contents
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Adjust space between Asian text and numbers
Foreword . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 6
5 Apparatus . 6
6 Test specimens . 8
7 Procedure . 9
8 Expression of results . 12
9 Test report . 18
Annex A (informative) Photographic illustrations of different types of scratch behaviour . 20
Annex B (informative) Example of a test machine . 22
Bibliography . 25

Foreword . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 5
5 Apparatus . 5
5.1 Test machine . 5
5.1.1 General . 5
5.1.2 Frame . 5
5.1.3 Scratch tip . 5
5.1.4 Test load . 6
5.1.5 Test speed . 6
5.1.6 Test specimen support . 6
5.1.7 Force indicator . 6
5.1.8 Scratch tip displacement gauge . 6
5.2 Instruments for measuring the test specimen dimensions . 6
5.3 Monitoring and inspection devices (optional) . 6
5.3.1 Monitoring device . 6
5.3.2 Scratch inspection device . 7
6 Test specimens . 7
6.1 Shape and dimensions . 7
6.2 Preparation . 7
6.2.1 Moulding . 7
6.2.2 Inspection of specimens and measurement of specimen dimensions . 7
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6.3 Number of test specimens . 7
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6.4 Conditioning . 8
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7 Procedure . 8
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7.1 Test atmosphere. 8
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iii
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7.2 Scratch test . 8
7.2.1 General . 8
7.2.2 Scratch tip . 8
7.2.3 Test load . 8
7.2.4 Test speed . 9
7.2.5 Test direction . 10
7.2.6 Clamping . 10
7.2.7 Testing . 10
7.2.8 Recording of data . 10
7.2.9 Monitoring of scratch behaviour and inspection of the scratched surface (optional) . 10
8 Expression of results . 11
8.1 General . 11
8.2 Determination of type of scratch behaviour . 11
8.3 Creation of scratch map . 11
8.4 Determination of critical normal load . 12
9 Test report . 14
Annex A (informative) Photographic illustrations of different types of scratch behaviour . 16
Annex B (informative) Example of a test machine . 17
Bibliography . 18

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iv © ISO 2024 2025 – All rights reserved
iv
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Formatted: Font: Bold
Foreword
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
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).
Formatted: English (United Kingdom)
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.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
Organiza
...