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ASTM D5478-13

Current Revision

Standard Test Methods for Viscosity of Materials by a Falling Needle Viscometer

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1.1 These test methods cover the measurement of the viscosity of Newtonian and non-Newtonian liquids. These test methods are applicable to liquids having viscosities in the range from 5 × 10−4 to 103 Pa·s (0.5 to 106 cP). The shear rate range is dependent upon the needle used and viscosity of the liquid and may vary from 10−4 to 103 s−1. With an extension bar and applied weight, a shear rate of 104 s–1 may be achieved.

1.2 The yield stress of liquids having this property may also be determined.

1.3 These test methods consist of determining liquid viscosities of Newtonian and non-Newtonian fluids (clear or opaque) by measuring the steady-state (constant) or terminal velocities of cylindrical needles as they fall through the test liquid under the influence of gravity. Yield stresses of non-Newtonian liquids may be measured using the same procedure.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


5.1 These test methods are applicable for measuring the rheological properties of varnishes and paints. In particular, the low to moderate shear rate measurements provide information related to sag resistance, leveling, etc.

SDO ASTM: ASTM International
Document Number D5478
Publication Date Feb. 1, 2013
Language en - English
Page Count 5
Revision Level 13
Supercedes
Committee D01.24
Publish Date Document Id Type View
Feb. 1, 2013 D5478-13 Revision
Feb. 1, 2009 D5478-09 Revision
June 10, 1998 D5478-98 Revision
Dec. 1, 2022 D5478-13R22 Reaffirmation
Sept. 1, 2018 D5478-13R18 Reaffirmation
Dec. 1, 2003 D5478-98R03 Reaffirmation