ISO 7784-1-2023 PDF

Full title and description

Paints and varnishes — Determination of resistance to abrasion — Part 1: Method with abrasive‑paper covered wheels and rotating test specimen. This international standard specifies a laboratory test method to quantify the abrasion resistance of coatings by means of two loaded, freely rotatable, eccentrically arranged wheels covered with abrasive paper that act on a rotating test specimen.

Abstract

This document (Edition 3) defines the apparatus, test specimen preparation, test procedure, loading conditions and reporting requirements for the rotating abrasive‑paper wheel method used to determine the resistance to abrasion of organic and related coatings. It replaces the 2016 edition and is intended for reproducible comparison of coating performance under specified test conditions.

General information

• Status: Published / Current.
• Publication date: 3 February 2023 (Edition 3, published February 2023).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 87.040 — Paints and varnishes.
• Edition / version: Edition 3 (2023).
• Number of pages: 8 pages (typical PDF/print length).

Scope

Specifies a laboratory test method for determining the resistance to abrasion of coatings (paints, varnishes and related products) using two abrasive‑paper covered wheels acting on a rotating specimen. The method covers apparatus, specimen preparation, conditioning, test parameters (loads, wheel speed, number of cycles), and the form of test report; it is intended for comparative evaluation rather than direct prediction of in‑service wear under all real‑world conditions.

Key topics and requirements

• Test principle: two eccentrically arranged, freely rotating wheels covered with abrasive paper abrade a rotating sample under specified load and speed.
• Apparatus specification: wheel dimensions, abrasive paper grade, loading mechanism and specimen holder geometry.
• Specimen preparation and conditioning: substrate, coating thickness, drying/cure, and environmental conditioning before testing.
• Test parameters and procedure: specified loads, wheel rotation and specimen speed, number of cycles, and sequence of measurements.
• Measurement and evaluation: determination of mass loss, wear index or observable damage and required reporting format.
• Repeatability/precision considerations and requirements for calibration and verification of the test machine.
• Reporting: test conditions, specimen data, abrasive used, results and any deviations from the standard procedure.

Typical use and users

Used by coating manufacturers, independent test laboratories, quality control departments, R&D teams and standards bodies to compare abrasion resistance of coating formulations, verify compliance with product specifications, and support product development and quality assurance activities. Test houses use it for routine QC and for comparative ranking of coatings.

Related standards

Closely related items include ISO 7784-2 (rotating abrasive rubber wheel method, revised in 2023), earlier editions of ISO 7784-1 (1997, 2016) and national/adopted versions such as EN ISO / BS EN / DIN EN adaptations. Other complementary standards describe alternative abrasion tests and specimen preparation techniques for coatings.

Keywords

abrasion resistance, paints and varnishes, abrasive paper, rotating specimen, abrasive wheels, wear test, coatings test, ISO/TC 35/SC 9, laboratory method.

FAQ

Q: What is this standard?

A: ISO 7784-1:2023 is an international standard that specifies a laboratory method to determine the abrasion resistance of coatings using abrasive‑paper covered wheels and a rotating test specimen.

Q: What does it cover?

A: It covers apparatus, specimen preparation and conditioning, test procedure (loads, speeds, cycles), measurement and reporting of abrasion results for comparative evaluation of coating materials.

Q: Who typically uses it?

A: Coating manufacturers, independent test laboratories, QC and R&D personnel, procurement and certification bodies who need standardized, repeatable abrasion testing for specification, development and quality control.

Q: Is it current or superseded?

A: Current — ISO 7784-1:2023 (Edition 3) was published in February 2023 and supersedes the 2016 edition. Users should adopt the 2023 edition for the latest requirements.

Q: Is it part of a series?

A: Yes — it is Part 1 of ISO 7784 (abrasion resistance of coatings). Part 2 covers the abrasive rubber wheel method; both parts have been revised in recent years. National and regional bodies often publish identical or adoped versions (EN ISO, BS EN, DIN EN).

Q: What are the key keywords?

A: Abrasion, abrasion resistance, coatings test, abrasive wheels, abrasive paper, rotating specimen, paints and varnishes, wear resistance, ISO 7784.