ASTM D3360-96
Standard Test Method for Particle Size Distribution by Hydrometer of the Common White Extender Pigments

Standard No.

ASTM D3360-96

Release Date

1996

Published By

American Society for Testing and Materials (ASTM)

Status

Withdraw 2003-01

Latest

ASTM D3360-96

Scope

1.1 This test method covers the determination of the particle-size distribution in the sub-sieve size range of the common extender pigments such as aluminum silicate (kaolin clay), magnesium silicate (talc), calcium carbonate (calcite or dolomite or precipitated calcium carbonate), and mica pigments, and may also be extended to the denser prime pigments such as the white titanium pigments (rutile or anatase) and similar mineral pigments when and if such information is of concern. Particle-size distribution has significance in the evaluation of rheological and pigmentary properties of pigments in paint and also may sometimes be used to characterize the identity or grade of pigments. 1.2 Sedimentation methods having as their basis Stoke’s law have found general acceptance for this purpose. Results are expressed in terms of equivalent spherical diameter (e.s.d.), the diameter of a sphere having the same specific gravity as the particle in question and which settles at the same rate. Most mineral pigment particles are more or less asymmetrical, but despite differences in the relationship between equivalent spherical diameter and actual dimensions, the results of a sedimentation particle-size analysis can be correlated readily with many pigment properties. 1.3 Procedures limited to gravitational sedimentation2,3,4,5 are relatively inaccurate for pigment particles smaller than about 1 µm e.s.d., and centrifugal procedures may be required for the much finer ranges. Nevertheless, the data obtained above the 1-µm limitation provide useful information. This test method is particularly applicable to pigments if a major fraction of the particles fall in the range from about 15 to 1.5 µm, but have a total particle-size range of at least two decades. 1.4 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.

ASTM D3360-96 Referenced Document

• ASTM D1193 Standard Specification for Reagent Water*， 1999-04-21 Update
• ASTM D280 Standard Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments
• ASTM D422 Standard Test Method for Particle-Size Analysis of Soils
• ASTM E100 Standard Specification for ASTM Hydrometers
• ASTM E300 Standard Practice for Sampling Industrial Chemicals

ASTM D3360-96 history

• 1996 ASTM D3360-96 Standard Test Method for Particle Size Distribution by Hydrometer of the Common White Extender Pigments