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ISO/NP 25900

Plastics — Determination of air permeability — Gas flow rate method

General information

Current stage: 10.20 Effective date: Jul 30, 2025

Originator: ISO

Owner: ISO/TC 61/SC 5

Type: International Standard

Scope

This document specifies a procedure for the determination of air permeability based on the measurement of the gas flow rate, establishes general principles, and gives guidelines for performance of measurements. The air permeability is applicable for plastic films, artificial leathers, pieces of plastics, foam board and elastic porous plastics.

Life cycle

NOW

IN_DEVELOPMENT
ISO/NP 25900
10.20 New project ballot initiated
Jul 30, 2025