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ISO/CD 15184

Paints and varnishes — Determination of film hardness by pencil test

General information

30.20     Mar 9, 2026

ISO

ISO/TC 35/SC 9

International Standard

Scope

This document specifies a method for determining the film hardness by pushing pencils of known hardness over the film.
The test can be performed on a single coating of a paint, varnish or related product, or on the upper layer of a multi-coat system.
This rapid test has not been found to be useful in comparing the pencil hardness of different coatings. It is more useful in providing relative ratings for a series of coated panels exhibiting significant differences in pencil hardness.
The method is applicable only to smooth surfaces.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 15184:2020

NOW

IN_DEVELOPMENT
ISO/CD 15184
30.20 CD study/ballot initiated
Mar 9, 2026

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