1、Designation:D129095(Reapproved 2015)Standard Test Method forSediment in Water-Emulsion Polishes by Centrifuge1This standard is issued under the fixed designation D1290;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、revision.A number 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 method covers the determination of sedimentin water-emulsion polishes by means of a centrifuge.1.2 The values stated i
3、n SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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
4、practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1796 Test Method for Water and Sediment in Fuel Oils bythe Centrifuge Method(Laboratory Procedure)3.Significance and Use3.1 This test method determines the amount of sediment
5、inwater-emulsion polishes.Sediment is generally believed tohave negative effects on water-emulsion polish properties.4.Apparatus4.1 Centrifuge and Tubes,conforming to Paragraphs 6.1 and6.2 on Centrifuge and Centrifuge Tubes of Test Method D1796.5.Sample5.1 The sample shall be thoroughly representati
6、ve of thematerial in question,and the portion used for the test shall bethoroughly representative of the sample itself.6.Procedure6.1 Measure 100 mLof the water-emulsion wax into each oftwo centrifuge tubes and stopper the tubes.Balance the twotubes in their holders.6.2 Place the two tubes on opposi
7、te sides of the head andwhirl for 10 min at a rate,calculated from the equation inParagraph 6.1.3 under Centrifuge of Test Method D1796,sufficient to produce a relative centrifugal force(rcf)ofbetween 500 and 700 at the tips of the whirling tubes(see Table2,Rotation Speeds Applicable for Centrifuges
8、 of VariousDiameters of Swing,of Test Method D1796 for relationshipbetween diameter of swing,rcf,and rpm).6.3 Read the volume of sediment in each tube,estimating tothe nearest 0.1 mL if necessary.Record the average of the tworeadings as the percentage of sediment by the centrifugemethod.7.Precision
9、and Bias7.1 PrecisionInterlaboratory and intralaboratory duplicatedeterminations of sediment by this test method should notdiffer by more than 0.2 mL.7.2 BiasThis test method has no bias because the resultsdeveloped are defined in terms of this test method.8.Keywords8.1 centrifuge;polishes;sediment;
10、water-emulsions1This test method is under the jurisdiction ofASTM Committee D21 on Polishesand is the direct responsibility of Subcommittee D21.03 on Chemical and PhysicalTestingCurrent edition approved Nov.1,2015.Published November 2015.Originallyapproved in 1953.Last previous edition approved in 2
11、008 as D1290 95(2008).DOI:10.1520/D1290-95R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM Inter
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16、s)of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(www.astm.org).Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center,222Rosewood Drive,Danvers,MA 01923,Tel:(978)646-2600;http:/ 95(2015)2
