ISO 7884-7:1987

Glass — Viscosity and viscometric fixed points — Part 7: Determination of annealing point and strain point 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

Buying

Statusi: Publikuar

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Scope

The specified method provides values being useful for specifying the cooling programme in the production of glassware. The annealing point is determined by measuring the rate of midpoint viscous bending of a simple loaded glass beam. The strain point is subsequently determined by an extrapolation method. Annex A provides the formulae for cross-sectional moment of inertia at various cross-section geometries, and annex B shows an example of beam bending apparatus

Life cycle

NOW

PUBLISHED
ISO 7884-7:1987
90.60 Close of review
5 mar 2026

National adoptions

SSH ISO 7884-7:2002

DPS

Qelqi. Viskoziteti dhe pikat fikse viskometrike. Pjesa 7: Percaktimi i pikes se kalitjes dhe i pikes se tendosjes ne boshtin e lakuar.

60.60 Standard published

DPS/KT 129 më tepër