1、Designation: D2281 10Standard Test Method forEvaluation of Wetting Agents by the Skein Test1This standard is issued under the fixed designation D2281; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A num
2、ber in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method2,3covers the determination of theefficiency of ordinary commercial wetting agents as defined inTerminology D459. This tes
3、t method is applicable underlimited and controlled conditions, but does not necessarilyyield information correlating with specific end uses.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provid
4、ed for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility
5、 of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:4D459 Terminology Relating to Soaps and Other Detergents3. Summary of Test Method3.1 A weighted cotton test skein is dropped into a tallcylinder containing a wetting agent of known concentrationdissolved in water. The
6、time required for the cotton skein towet through and sink, relaxing the string stirrup to which it isattached will be recorded as the sinking time. This time relatesto the speed at which the wetting agent works and can be usedto compare agents.4. Apparatus4.1 Hook and Anchor:4.1.1 The hook of a standard weight and the attached anchorshall be prepared as follows: Bend a piece of No. 10 B or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D2281 103
