Glass — Viscosity and viscometric fixed points — Part 1: Principles for determining viscosity and viscometric fixed points
NORMA vydána dne 26.11.1987
Označení normy: ISO 7884-1:1987
Datum vydání normy: 26.11.1987
Počet stran: 8
Přibližná hmotnost: 24 g (0.05 liber)
Země: Mezinárodní technická norma
Kategorie: Technické normy 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.