1、Designation: D1290 95 (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
2、 last 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 valu
3、es stated in 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 saf
4、ety and health 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 a
5、mount of sediment 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 t
6、horoughly representative of thematerial in question, and the portion used for the test shall bethoroughly representative of the sample itself.6. Procedure6.1 Measure 100 mL of the water-emulsion wax into each oftwo centrifuge tubes and stopper the tubes. Balance the twotubes in their holders.6.2 Pla
7、ce the two tubes on opposite 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 Sp
8、eeds Applicable for Centrifuges 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
9、by the centrifugemethod.7. Precision 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. Key
10、words8.1 centrifuge; polishes; sediment; 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. Originallyapprove
11、d in 1953. Last previous edition approved in 2008 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
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14、e years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical c
15、ommittee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
16、 19428-2959,United States. Individual reprints (single or multiple copies) 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
