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ISO/CD 304-1.2

Surface active agents — Determination of surface tension — Part 1: Ring method

General information

30.20     Sep 22, 2026

ISO

ISO/TC 91

International Standard

Scope

The maximum force is measured which is necessary to act vertically on a stirrup or a ring, in contact with the surface of the liquid being examined placed in a measuring cup, in order to separate it from this surface, or on a plate with an edge in contact with the surface, in order to draw up the film that has formed. The surface tension of pure liquids or other solutions can also be measured by this method.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 304:1985

PUBLISHED
ISO 304:1985/Cor 1:1998

NOW

PROJECT
ISO/CD 304-1.2
30.20 CD study/ballot initiated
Sep 22, 2026

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