BS EN ISO 2431:2019 - Paints and varnishes. Determination of flow time by use of flow cups

BS EN ISO 2431:2019

Paints and varnishes. Determination of flow time by use of flow cups

Status : Current   Published : July 2019



This document specifies a method for determining the flow time of paints, varnishes and related products that can be used to control consistency.

Four flow cups of similar dimensions, but having orifice diameters of 3 mm, 4 mm, 5 mm and 6 mm, are specified. Two methods for checking the flow cups for wear and tear are given (see Annex A).

Flow cups with a replaceable jet are not covered by this document as the close tolerances on the supply of the material under test to the jet are not met.

Commonly used dipping flow cups are also not covered by this document.


Since the fabrication tolerances for such flow cups are greater than those of the flow cups specified in this document, flow time determinations with dipping flow cups give a precision which is lower than that obtained with the flow cups specified in this document (see Clause 9).

The method described in this document is limited to testing materials for which the breakpoint of the flow from the orifice of the flow cup can be determined with certainty. This point is difficult to determine and reproduce for materials with flow times near the upper limit of the measurement range (100 s) due to slowing-down effects.

Standard NumberBS EN ISO 2431:2019
TitlePaints and varnishes. Determination of flow time by use of flow cups
Publication Date19 July 2019
Normative References(Required to achieve compliance to this standard)ISO 1513, ISO 15528, ISO 4618
Informative References(Provided for Information)ISO 5725-2, ISO 4287, ISO Guide 30, ISO 3219
ReplacesBS EN ISO 2431:2011
International RelationshipsEN ISO 2431:2019,ISO 2431:2019
Amended ByCorrigendum, October 2019
DescriptorsReproducibility, Temperature, Calibration, Varnishes, Paints, Testing conditions, Marking, Coatings, Test equipment, Consistency (mechanical property), Viscosity measurement
Title in FrenchPeintures et vernis. Détermination du temps d'écoulement au moyen de coupes d'écoulement
Title in GermanBeschichtungsstoffe. Bestimmung der Auslaufzeit mit Auslaufbechern
ISBN978 0 539 06882 5
File Size1.501 MB

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