International Standard
ISO 7884-7:1987
Glass — Viscosity and viscometric fixed points — Part 7: Determination of annealing point and strain point by beam bending
Reference number
ISO 7884-7:1987
ISO 7884-7:1987
Edition 1
1987-12
1987-12
© ISO 2024
International Standard
p
ISO 7884-7:1987
14831
Published
(Edition 1, 1987)
This standard was last reviewed and confirmed in 2020.
Therefore this version remains current.
Abstract
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
Got a question?
Check out our FAQs
Customer care
+41 22 749 08 88
Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)