ISO 7884-4:1987

Glass — Viscosity and viscometric fixed points — Part 4: Determination of viscosity by beam bending

Publication date: 26 nën 1987

General information

Current stage: 90.60 Effective date: 5 mar 2026

Originator: ISO

Owner: ISO/TC 48/SC 7

Type: International Standard

ICS: 81.040.01

Gjuha: anglisht

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Statusi: Publikuar

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Scope

A method of determining the dynamic viscosity of glass on a rod-shaped test specimen, i.e. a beam, supported at its end is specified. The viscous deflection rate of the beam is measured under given load at the midpoint between the supports. In addition the viscosity-temperature relationship and the dependence of the viscosity on the thermal history of the sample can be determined. The theoretical basis relations and the apparatus including method of measurements are described.

Life cycle

NOW

PUBLISHED
ISO 7884-4:1987
90.60 Close of review
5 mar 2026

National adoptions

SSH ISO 7884-4:2002

DPS

Qelqi. Viskoziteti dhe pikat fikse viskometrike. Pjesa 4: Percatkimi i viskozitetit nga boshti i lakuar.

60.60 Standard published

DPS/KT 129 më tepër