Meaning and use
4.1 For manufacturers and buyers of coatings, the importance of the evaluation of resistance to flow in quality control is needless to say. Real-world application tests are less reproducible, and viscosity methods, such as test method D2196, are very time consuming and lack compelling aspects of real flow hanging. The method provides a simple and fast test in which the current hang resistance is demonstrated by a visible drooping pattern and an objective rating is given based on the numerical values associated with the spawn test observations.

ASTM D4400-2018 “Determination of Paint Resistance by Multi-Notch Coater”

Radius
1.1 This test method covers laboratory determination of the flow resistance of aqueous and non-aqueous liquid coatings at any flow resistance level.

1.2 Values expressed in SI units or inch-pound units shall be treated as standard values separately. The values specified in each system may not be fully equivalent; Therefore, each system should be used independently of each other. Combining values from two systems may result in non-compliance.

Note 1: Since the Commission is aware that one manufacturer of the applicator is aware of manufacturing in inch-pounds, reference to the applicator will be taken as the standard.

1.3 This standard is not intended to address all safety concerns, if any, associated with its use. It is the responsibility of users of this standard to establish appropriate safety, health and environmental practices and to determine the applicability of regulatory restrictions prior to use.

1.4 This international standard is based on internationally recognized standardization principles established in the Decision on Principles for the Development of International Standards, Guidelines and Recommendations issued by the WTO Committee on Technical Barriers to Trade.