SIST EN ISO 19403-5:2025 PDF

Paints and varnishes - Wettability - Part 5: Determination of the polar and dispersive fractions of the surface tension of liquids from contact angles measurements on a solid with only a disperse contribution to its surface energy (ISO 19403-5:2024)

Title (English):

SIST EN ISO 19403-5:2025

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 13
Publication date:: December 11, 2024
ICS:: 87.040
Technical committee:: IBLP - Paints and varnishes

Document language:

enru

Delivery time:1–7 days

Price:60 €

Description (English):

This document specifies a test method to determine the polar and dispersive fractions of the surface tension of liquids by optical methods. The method can be applied for the characterization of liquid coating materials. If applied to liquids with non-Newtonian flow behaviour (see ISO 3219-1:2021, 3.22), restrictions can apply.

Technical details

SKU: SIST EN ISO 19403-5:2025

Abstract

Overview

EN ISO 19403-5:2024 - Paints and varnishes - Wettability - Part 5 specifies an optical test method to determine the polar and dispersive fractions of the surface tension of liquids from contact angle measurements on a reference solid that has only a disperse contribution to its surface energy. The standard is intended mainly for the characterization of liquid coating materials and supports consistent, comparable wettability and surface-tension data for paints, varnishes and related products.

Key topics and requirements

Scope: Optical determination of polar and dispersive surface-tension fractions; restrictions may apply for liquids with non-Newtonian behavior (see ISO 3219-1:2021).
Principle: Four-step approach - (1) measure liquid surface tension (ISO 19403-3, EN 14370 or ISO 1409); (2) determine surface free energy of a dispersive reference solid (ISO 19403-2); (3) measure contact angle (static or dynamic) between liquid and reference solid (ISO 19403-2); (4) calculate dispersive and polar fractions using OWRK (Owens–Wendt–Rabel–Kaelble) or Wu methods.
Reference solids: Use chemically and topologically homogeneous dispersive materials such as PTFE or paraffin. Recommended values: PTFE ≈ (18.5 ± 0.5) mJ/m and paraffin ≈ (25.5 ± 0.5) mJ/m (OWRK basis). Surface roughness R_a preferably

Related standards

Standards mentioned in the description

Overview

Key topics and requirements

Scope: Optical determination of polar and dispersive surface-tension fractions; restrictions may apply for liquids with non-Newtonian behavior (see ISO 3219-1:2021).
Principle: Four-step approach - (1) measure liquid surface tension (ISO 19403-3, EN 14370 or ISO 1409); (2) determine surface free energy of a dispersive reference solid (ISO 19403-2); (3) measure contact angle (static or dynamic) between liquid and reference solid (ISO 19403-2); (4) calculate dispersive and polar fractions using OWRK (Owens–Wendt–Rabel–Kaelble) or Wu methods.
Reference solids: Use chemically and topologically homogeneous dispersive materials such as PTFE or paraffin. Recommended values: PTFE ≈ (18.5 ± 0.5) mJ/m and paraffin ≈ (25.5 ± 0.5) mJ/m (OWRK basis). Surface roughness R_a preferably

SIST EN ISO 19403-5:2025 PDF

Technical details

Abstract

Overview

Key topics and requirements

Related standards

Abstract

Overview

Key topics and requirements

Related standards

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