标准编号：ISO 2431:2019
中文名称：色漆和清漆 用流出杯测定流出时间
英文名称：Paints and varnishes — Determination of flow time by use of flow cups
发布日期：2019-06
标准范围
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.
NOTE 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.
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