Glass — Viscosity and viscometric fixed points — Part 1: Principles for determining viscosity and viscometric fixed points
NORM herausgegeben am 26.11.1987
Bezeichnung normen: ISO 7884-1:1987
Ausgabedatum normen: 26.11.1987
Zahl der Seiten: 8
Gewicht ca.: 24 g (0.05 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / Abstract: Rules a given characterizing glass as a liquid (or liquid-analogue deformable) material. Three ranges of viscosity can be distinguished: melting, working and annealing range. General requirements for measurement and calibration, for apparatus and for sampling are specified. The formulae for calculating the different values are described. In annex A tables for estimating the influence of errors in viscosity and temperature determination and in annex B examples of certified reference glasses are shown.