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ISO 787-23:1979

General methods of test for pigments and extenders — Part 23: Determination of density (using a centrifuge to remove entrained air)

Dec 1, 1979

General information

90.93     Mar 6, 2023

ISO

ISO/TC 256

International Standard

87.060.10  

French   English  

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Scope

Displacement liquids of known density should be selected in which the material to be tested is insoluble, and which has good wetting properties and a low evaporation rate under vacuum. High-boiling aromatic or aliphatic hydrocarbons are suitable. The temperature, t, at which the determination is carried out affects the density of the displacement liquid; each weighing should be made at a constant temperature. The principle consists in weighing into a tared tube a quantity of a dried sample, wetting it with displacement liquid, centrifuging until the occluded air is removed and calculation of the density from the difference of masses.

Life cycle

NOW

PUBLISHED
ISO 787-23:1979
90.93 Standard confirmed
Mar 6, 2023

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