1.1 This part of ISO 787 specifies a general method for determining
the residue on a sieve from a Sample of Pigment or
extender dispersed in water, using a mechanical flushing
procedure. This method tan also be applied to the examination
of other powders or granules which are insoluble in water. lt is
neither applicable to hydrophobic nor pelletized Pigments and
extenders.
1.2 ISO 787/7 specifies a general method of test for determining
the residue on a sieve from a Sample of Pigment or
extender dispersed in water, using a manual procedure.
1.3 For most Pigments and extenders, these two test
methods will give different results, and it is therefore essential
to state clearly in a specification which method is to be used,
and in the test report, which method has been used.
NOTE - When either of these general methods is applicable to a given
Pigment or extender, only a Cross-reference to it should be included in
the International Standard relating to that Pigment or extender, with a
note of any detailed modification which may be needed in view of the
special properties of the material under consideration. Only when
neither of these general methods is applicable to a particular material a
special method for determination of residue on sieve should be
specified .
Diese ÖNORM beschreibt eine allgemeine Prüfmethode zur Bestimmung des Siebrückstandes aus einer Probe von in Wasser dispergiertem Pigment oder Füllstoff mittels eines mechanischen Spülverfahrens. Diese Methode kann auch zur Untersuchung anderer nicht wasserlöslicher Pulver oder Granulate verwendet werden. Sie ist jedoch weder bei hydrophoben noch bei pelletierten Pigmenten und Füllstoffen anwendbar.