1、Designation: D 2048 92 (Reapproved 2008)Standard Test Method forPowdering of Floor Polish Films1This standard is issued under the fixed designation D 2048; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a bench procedure for thedetermination of the degree of powdering of floor polishesunder ambient conditions
3、as well as conditions of low relativehumidity.1.2 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 of regul
4、atory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 3153 Test Method for Recoatability of Water-EmulsionFloor Polishes3. Terminology3.1 Definition:3.1.1 powderingpartial or total disintegration of the pol-ish film resulting in a fine, light colored material.4. Significance an
5、d Use4.1 This is a comparative test method. If this method doesnot indicate powdering, it is still possible that the product inactual use may powder.5. Apparatus5.1 Textile Crockmeter,3weighted with a 1-kg weight. Theweight is placed directly over the abrasion dowel and attachedwith two-faced tape.5
6、.2 Abrading Felt670 Kelly No. 720 billiard cloth cutinto 50 by 50-mm (2 by 2-in.) squares.5.3 SubstrateOfficial Vinyl Composition Tile (OVCT)4shall be used in this test.5.4 Volumetric Pipet, 2-mL.5.5 Cheesecloth Applicator, washed to remove sizing; cutinto 50-mm (2-in.) strips of four-ply cloth; fol
7、ded twice.5.6 Relative Humidity and Temperature Indicator.5.7 Glove BoxAn enclosure that houses the crockmeterkeeping it in a constant humidity and temperature environment;features rubber glove inserts so that the tests may be runkeeping the environment of the crockmeter constant.5.8 DesiccantSilica
8、 gel or calcium chloride.5.9 Salts for Constant Humidity ConditionsLiClH2O,CaCl26H2O, or Mg(NO3)26H2O.NOTE 1Saturated aqueous solutions of the following salts in contactwith an excess of a definite solid phase of salt at the indicatedtemperatures and in an enclosed space will maintain the required c
9、onstanthumidities:LiClH2O at 25C (77F) yields 11.1 % relative humidity.CaCl26H2O at 10C (50F) yields 38.0 % relative humidity.Mg(NO3)26H2O at 23.9C (75F) yields 42.9 % relative humidity.5.10 Fan, small, electric.5.11 Metal Clip, to hold the abrading felt on the crockmetersurface during testing.6. Pr
10、eparation of Test Sample6.1 Clean the tile surface in accordance with Test MethodD 3153, paragraph 9.1.2, to ensure removal of any coatingpresent.6.2 Pipet 2 mL of polish onto the center of the test panel.Place the cheesecloth into the polish and allow it to absorb theemulsion. Distribute the emulsi
11、on evenly over the surface; thendraw the cheesecloth downward in smooth separate strokes,with no more pressure than is exerted by the weight of thehand, until the entire panel has been coated. If 304 by 304-mm(12 by 12-in.) tiles are used, pipet 3.6 mL of polish out thecenter of each tile.6.3 Apply
12、a second coat of polish 1 h after the first. Applythis coat in the same manner as the first coat.6.4 One hour after the second coat of polish has dried, placeone of the test tiles in the glove box in which the relativehumidity is 10 to 15 %. The low humidity is obtained and1This test method is under
13、 the jurisdiction ofASTM Committee D21 on Polishesand is the responsibility of Subcommittee D21.04 on Performance Tests.Current edition approved March 1, 2008. Published April 2008. Originallyapproved in 1964. Last previous edition approved in 2002 as D 2048 92(2002).2For referenced ASTM standards,
14、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.3The sole source of supply of the apparatus known to the committee at this timeis Atlas Elect
15、ric Devices Co., Chicago, IL. If you are aware of alternative suppliers,please provide this information toASTM Headquarters. Your comments will receivecareful consideration at a meeting of the responsible technical committee, whichyou may attend.4OVCT is Official Vinyl Composition Tile of the Chemic
16、al Specialties Manu-facturers Association, Inc., 1913 Eye St., N.W., Washington, DC 20006.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.controlled using silica gel or calcium chloride as the desiccantor by using a saturated salt so
17、lution with a small fan to circulatethe air inside the box. Also place inside the glove box thecrockmeter weighted with a 1-kg weight and the green felt testpads. Age the tiles and equipment for 24 h at 10 to 15 %relative humidity at 23.9 6 1.1C (75 6 2F).6.5 Prepare additional test tiles in the sam
18、e manner and dryfor24hat256 1.1C (77 6 2F) and 55 6 3 % relativehumidity.NOTE 2Prepared samples may also be tested at 10 6 1.1C (50 62F) and 38 6 3 % relative humidity.7. Procedure7.1 Test the prepared samples at 23.9 6 1.1C (75 6 2F)and 10 to 15 % relative humidity, and at 25 6 1.1C (77 62F) and 55
19、 6 3 % relative humidity.7.2 Place the coated sample on the sandpaper pad. Cover thedowel with the abrading felt using the metal clip. Pass thecovered dowel over each polish film for 50 complete cycles.Use a fresh surface for each test. Remove the green felt fromthe test machine and observe for degr
20、ee of powder adhering toit. Observe the test panel carefully for damage which may haveoccurred during the stroking action.8. Report8.1 The report shall include the following:8.1.1 Identification of sample,8.1.2 Temperature and humidity conditions of test, and8.1.3 Relative degree of white powder acc
21、umulation as seenon both the tile surface and the abrading felt. Report accordingto the following classifications: none, slight, or excessive.9. Precision and Bias9.1 Duplicate samples of polish, when tested by thismethod, show the same degree of powdering.9.2 Since there is no accepted reference ma
22、terial suitable fordetermining the bias for the procedure for measuring thepowdering resistance of floor polish films, bias has not beendetermined.10. Keywords10.1 abrading felt; billiard; crockmeter; desiccant; floor;glove box; OVCT; polish; powdering; textile crockmeterASTM International takes no
23、position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsi
24、bility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five 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
25、 ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, 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 addr
26、ess shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 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).D 2048 92 (2008)2
