Table of Contents

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Temperature considerations
5 Apparatus
6 Sampling
7 Procedure
8 Marking of products tested
9 Precision
10 Test report
Annex A (normative) - Checking flow cups for wear and tear
Annex B (informative) - Conversion of flow times from one
        temperature to another
Bibliography

Abstract

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

Scope

1.1 This International Standard specifies a method for determining the flow time of paints, varnishes and
related products that can be used to control consistency. 1.2 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 International Standard 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 International Standard. In general, the fabrication tolerances for such flow cups are greater than those of the flow cups specified in this International Standard. Therefore flow time determinations with dipping flow cups give a precision which is lower than that obtained with the flow cups specified in this International Standard (see Clause 9). 1.3 The method 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.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Organization for Standardization
Pages
ISBN
Committee	TC 35
Supersedes	ISO/DIS 2431 : 60.00 (2011)