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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.


Общая информация 

  • Текущий статус
     : Опубликовано
    Дата публикации
     : 1979-12
  • Версия
     : 1
  • Технический комитет
     : ISO/TC 256 Pigments, dyestuffs and extenders
  • ICS
     :
    87.060.10 Pigments and extenders

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  5. ISO/TC 256
  6. ISO 787-23:1979