General methods of test for pigments and extenders - Part 23 : Determination of density (using a centrifuge to remove entrained air)
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.
| SDO | ISO: International Organization for Standardization |
| Document Number | ISO 787 |
| Publication Date | Dec. 27, 1979 |
| Language | en - English |
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| Supercedes | |
| Committee | ISO TC 35/SC 2 |
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