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ASTM D1343-95(2019)

Current Reaffirmation

Standard Test Method for Viscosity of Cellulose Derivatives by Ball-Drop Method

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1.1 This test method describes the apparatus and general procedure for making ball-drop viscosity measurements on solutions of various cellulose derivatives. Instructions for sample preparation, solution concentration, and other details are discussed in the ASTM methods for the respective cellulose derivatives.

1.2 This test method is applicable to solutions of various cellulose derivatives having viscosities greater than 10 P, by using balls of various diameters and densities. Viscosity results are expressed preferably in poises.

1.3 In commercial practice, viscosities are often expressed in seconds using 2.38-mm (3/32-in.) stainless steel balls.2 When the viscosity is outside the practical range for these balls (75 to 300 P), the measurement can be made using a calibrated pipet viscometer or a different ball and calculating the observed viscosity to the corresponding time for a 2.38-mm (3/32-in.) ball, even though it is a small fraction of a second.

1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


4.1 This test provides an easy method of determining the viscosity of cellulose derivatives in a given solvent. The answers are in units commonly used in industrial practice. Such information is needed for cellulose derivatives that are to be extruded, molded, sprayed, or brushed as is or in solution.

SDO ASTM: ASTM International
Document Number D1343
Publication Date Dec. 1, 2019
Language en - English
Page Count 4
Revision Level 95(2019)
Supercedes
Committee D01.36
Publish Date Document Id Type View
Dec. 1, 2019 D1343-95R19 Reaffirmation
June 1, 2011 D1343-95R11 Reaffirmation
April 1, 2006 D1343-95R06 Reaffirmation
March 10, 2000 D1343-95R00 Reaffirmation