ISO 15184-2020 PDF

Full title and description

ISO 15184:2020 — Paints and varnishes — Determination of film hardness by pencil test. This International Standard specifies a simple, rapid method to assess the surface (film) hardness of paints, varnishes and related coating products by dragging pencils of defined hardness over the coated film to determine the hardest pencil that does not cause visible marking.

Abstract

The standard describes the pencil hardness test procedure for single coatings or the upper layer of multi‑coat systems on smooth surfaces. It is intended to provide relative ratings (useful for quality control and comparative work within a set of panels) rather than absolute hardness values across different coating types. Key test conditions, specimen preparation and apparatus requirements are specified.

General information

• Status: Published.
• Publication date: January 2020 (ISO edition 3).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 87.040 — Paints and varnishes.
• Edition / version: 3rd edition (2020).
• Number of pages: 6 pages (ISO electronic edition); national/adopted versions or publisher copies may show additional front matter (varying counts reported).

Scope

Specifies a practical test method for determining film surface hardness by using pencils of known hardness dragged across the film at a defined angle and load. The method applies to smooth coated substrates, can be used on single coatings or the top layer of multi‑coats, and is intended for relative comparisons (quality control, batch comparisons, R&D screening), not for establishing absolute hardness equivalence between different coating chemistries.

Key topics and requirements

• Principle: identify the hardest pencil that does not visibly mark the coating when drawn across the film under specified conditions.
• Apparatus: pencil holder or pencil hardness tester with a 45° pencil angle fixture, a means of applying a calibrated force, and a specimen carrier (metal block with wheels or equivalent).
• Test conditions: standard laboratory conditions (typically around 23 ± 2 °C and 50 ± 5 % RH) and conditioning of panels before testing.
• Load and geometry: specified pencil angle (45°) and a defined applied force for the test stroke; test procedure notes include preparation of pencil tips and inspection criteria.
• Specimen preparation and limitations: requires smooth surfaces and representative sampling; not suitable for rough or highly textured coatings; repeatability recommended by duplicate tests and bracketing.

Typical use and users

Used by paint and varnish manufacturers, quality control laboratories, R&D teams, coating formulators, surface‑engineering laboratories and certification bodies for routine quality checks, batch comparisons, formulation screening and production control. It is commonly used where a fast, inexpensive relative hardness check is needed.

Related standards

Related and cross‑referenced standards include earlier editions ISO 15184:2012 (superseded by the 2020 edition), and other ISO/CEN test methods for coatings and specimen preparation such as ISO 1514 (sample preparation and conditioning) and ISO 2808 (film‑thickness measurement) which are commonly used alongside this test. National adoptions (EN ISO / BS/UNE/UNI versions) exist that reproduce ISO 15184:2020 text.

Keywords

pencil hardness, film hardness, paints and varnishes, coatings, hardness test, pencil test, quality control, surface resistance.

FAQ

Q: What is this standard?

A: ISO 15184:2020 is an International Standard that specifies the pencil hardness test for determining the surface hardness of paint and varnish films.

Q: What does it cover?

A: It covers the apparatus, specimen preparation, test procedure and interpretation for performing the pencil hardness test on smooth coated surfaces to obtain a relative hardness rating. It includes procedural details such as pencil preparation, test angle and inspection criteria.

Q: Who typically uses it?

A: Coating manufacturers, QC/QA laboratories, R&D teams, test laboratories and standards organizations use it for routine quality control, product development screening and comparative testing within series of coated panels.

Q: Is it current or superseded?

A: ISO 15184:2020 is the current (3rd) edition published in January 2020; the 2012 edition was withdrawn and superseded by the 2020 edition. The standard is scheduled for periodic review per ISO procedures.

Q: Is it part of a series?

A: It forms part of the suite of ISO/CEN standards for paints and varnishes (ICS 87.040) addressing test methods for coatings; it is commonly used alongside specimen‑preparation and film‑thickness standards (for example ISO 1514 and ISO 2808).

Q: What are the key keywords?

A: pencil hardness, film hardness, paints, varnishes, coatings, hardness test, quality control.