ISO 19252:2025
(Main)Plastics — Determination of scratch properties
Plastics — Determination of scratch properties
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 reinforced compounds in addition to unfilled types; — thermosetting moulding materials, including filled and reinforced compounds; — thermosetting sheets, rigid thermoplastic moulding and extrusion materials, including filled and reinforced compounds in addition to unfilled types. 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
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Standards Content (Sample)
International
Standard
ISO 19252
Second edition
Plastics — Determination of scratch
2025-05
properties
Plastiques — Détermination du comportement à la rayure
Reference number
© ISO 2025
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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
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
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has been established has the right to be represented on that committee. International organizations,
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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.
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 reinforced compounds in
addition to unfilled
...
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