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ISO 1518-1:2019

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Paints and varnishes — Determination of scratch resistance — Part 1: Constant-loading method

This document specifies a test method for determining under defined conditions the resistance of a single coating or a multi-coat system of paint, varnish or related product to penetration by scratching with a scratch stylus loaded with a specified load. Penetration of the stylus is to the substrate, except in the case of a multi-coat system, in which case the stylus can penetrate either to the substrate or to an intermediate coat.

The method specified can be carried out

a) either as a "pass/fail" test, by testing with a single specified load applied to the stylus to assess conformity with a particular specification, or

b) as an assessment test by applying increasing loads to the stylus to determine the minimum load at which the coating is penetrated.

NOTE Neither this document nor ISO 1518‑2 specifies a method using a curved stylus, which is specified in ISO 12137. The choice between the three methods will depend on the particular practical problem.

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Related Information

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  • AS/NZS 1580.101.1:1999

    Methods of test for paints and related materials - Conditions of test - Temperature, humidity and airflow control

  • AS/NZS 1580.101.4:1999

    Methods of test for paints and related materials - Conditions of test - Temperature control

  • AS/NZS 1580.101.5:1999

    Methods of test for paints and related materials - Conditions of test - Temperature and humidity control

  • AS/NZS 1580.102.2:1995

    Methods of test for paints and related materials - In-process sampling

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