Reference number
ISO 787-23:1979
ISO 787-23:1979
© ISO 2024
International Standard
ISO 787-23:1979
General methods of test for pigments and extenders — Part 23: Determination of density (using a centrifuge to remove entrained air)
Edition 1
1979-12
1979-12
ISO 787-23:1979
5102
Published
(Edition 1, 1979)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
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.
General information
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Status: PublishedPublication date: 1979-12Stage: International Standard confirmed [90.93]
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Edition: 1Number of pages: 2
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Technical Committee :ISO/TC 256ICS :87.060.10
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