EN
SR EN ISO 787-23:2002
Metode generale de încercare pentru pigmenţi şi materiale de umplutură. Partea 23: Determinarea densităţii (utilizând o centrifugă pentru îndepărtarea aerului antrenat)
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.
Status :
In vigoare
Data aprobării : 23.11.2002
Data publicării : 24.11.2002
Număr de pagini : 12
ICS : 87.060.10 Pigmenti si materiale de umplutura
Comitet tehnic : 338 - Lacuri, vopsele, cerneluri, răşini, pigmenţi anorganici şi adezivi
- Inlocuieste STAS 7948/10-70
- Indicat la referinte SR EN ISO 15528:2001
- Indicat la referinte SR ISO 787-10:1995