EN ISO 787-23:1995
Current
The latest, up-to-date edition.
General method of tests for pigments and extenders - Part 23: Determination of density (using a centrifuge to remove entrained air) (ISO 787-23:1979)
23-08-1995
Foreword
0 Introduction
1 Scope and field of application
2 References
3 Preliminary considerations
4 Apparatus
5 Sampling
6 Procedure
7 Expression of results
8 Precision
9 Test report
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.
| Committee |
CEN/TC 298
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Current
|
| Standards | Relationship |
| NF EN ISO 787-23 : 1995 | Identical |
| ISO 787-23:1979 | Identical |
| NBN EN ISO 787-23 : 1995 | Identical |
| NEN EN ISO 787-23 : 1995 | Identical |
| NS EN ISO 787-23 : 1ED 1995 | Identical |
| I.S. EN ISO 787-23:1996 | Identical |
| PN EN ISO 787-23 : 1999 | Identical |
| SS-EN ISO 787-23 : 1995 | Identical |
| BS EN ISO 787-23:1995 | Identical |
| UNE-EN ISO 787-23:1996 | Identical |
| DIN EN ISO 787-23:1995-10 | Identical |
| ISO 842:1984 | Raw materials for paints and varnishes — Sampling |
| ISO 787-10:1993 | General methods of test for pigments and extenders — Part 10: Determination of density — Pyknometer method |