ISO/TC 35 Lacke und Anstrichstoffe,
ISO/TC 35 Paints and varnishes,
ISO/TC 35 Peintures et vernis,
ISO Internationale Organisation für Normung,
ISO International Organization for Standardization,
ISO Organisation Internationale de Normalisation
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Media type:
Standard
Title:
ISO 8781-2
:
Pigments and extenders; methods of assessment of dispersion characteristics; part 2: assessment from the change in fineness of grind
Other titles:
Früher unter dem Titel: ISO/DIS 8781-2 (1986-04)
Pigmente und Füllstoffe - Verfahren zur Beurteilung des Dispergierverhaltens - Teil 2: Bestimmung der Änderung der Mahlfeinheit (ISO 8781-2:1990)
Pigments et matières de charge; méthodes d'évaluation de la dispersibilité; partie 2: évaluation à partir de la variation de la finesse de broyage
Footnote:
Internationale Übereinstimmung mit: DIN 53238-20 (1978-06), IDT*DIN EN ISO 8781-2 (1995-04), IDT*DIN ISO 8781-2 (1992-04), IDT*BS EN ISO 8781-2 (1991-04-30), IDT*GB/T 21867.2 (2008), IDT*DS/EN ISO 8781-2 (1996-03-11), IDT*prEN 28781-2 (1994-08), IDT*EN ISO 8781-2 (1995-03), IDT*NF T31-220-2 (1995-05-01), IDT*JIS K 5101-5-2 (2004-02-20), IDT*SN EN ISO 8781-2 (1995), IDT*OENORM EN ISO 8781-2 (1995-06-01), IDT*OENORM ISO 8781-2 (1993-11-01), IDT*PN-EN ISO 8781-2 (2000-08-11), IDT*UNE-EN ISO 8781-2 (1996-05-24), IDT*KS M ISO 8781-2 (2002-01-14), IDT*KS M ISO 8781-2 (2022-11-09), IDT*UNI EN ISO 8781-2:1997 (1997-09-30), IDT*STN EN ISO 8781-2 (2002-01-01), IDT*CSN EN ISO 8781-2 (1997-12-01), IDT*NEN-EN-ISO 8781-2:1995 en (1995-04-01), IDT
Description:
The method is of general use for comparing similar pigments, for example a test pigment against an agreed reference pigment. The pigment is dispersed in stages under specified conditions in an agreed binder system. After each stage, a portion of the mill base is taken and its fineness of grind is determined as described in ISO 1524. The fineness-of-grind values are plotted graphically as a function of the dispersion work done (expressed as time, number of revolutions, etc.). From the graph, the work necessary to obtain an agreed fineness of grind is determined.