1、Designation: D2048 10Standard Test Method forPowdering of Floor Polish Films1This standard is issued under the fixed designation D2048; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthe
2、ses 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 a bench procedure for thedetermination of the degree of powdering of floor polishesunder ambient conditions as well as conditions
3、 of low relativehumidity.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 provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafe
4、ty 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 regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D3153 Test Method for Recoatabil
5、ity 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 and Use4.1 This is a comparative test method. If this method doesnot indicate powdering, it is still possible
6、 that the product inactual use may powder.5. Apparatus5.1 Textile Crockmeter,3weighted with a 2.2-lb (1-kg)weight. The weight is placed directly over the abrasion doweland attached with two-faced tape.5.2 Abrading Felt670 Kelly No. 720 billiard cloth cutinto 2 by 2-in. (50 by 50-mm) squares.5.3 Subs
7、trateOfficial Vinyl Composition Tile (OVCT)4shall be used in this test.5.4 Volumetric Pipet, 0.07-oz (2-mL).5.5 Cheesecloth Applicator, washed to remove sizing; cutinto 2-in. (50-mm) strips of four-ply cloth; folded twice.5.6 Relative Humidity and Temperature Indicator.5.7 Glove BoxAn enclosure that
8、 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 gel or calcium chloride.5.9 Salts for Constant Humidity ConditionsLiClH2O,CaCl26H2O, or
9、 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 constanthumidities:LiClH2O at 77F (25C) yields 11.1 % relative humidity.CaCl26H2O at 50F
10、(10C) yields 38.0 % relative humidity.Mg(NO3)26H2O at 75F (23.9C) yields 42.9 % relative humidity.5.10 Fan, small, electric.5.11 Metal Clip, to hold the abrading felt on the crockmetersurface during testing.1This test method is under the jurisdiction ofASTM Committee D21 on Polishesand is the respon
11、sibility of Subcommittee D21.04 on Performance Tests.Current edition approved May 1, 2010. Published June 2010. Originallyapproved in 1964. Last previous edition approved in 2008 as D2048 92(2008).DOI: 10.1520/D2048-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact A
12、STM 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 Electric Devices Co., Chicago, IL. If you are aware of
13、 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 Chemical Specialties Manu-facturers Association, Inc.,
14、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.6. Preparation of Test Sample6.1 Clean the tile surface in accordance with Test MethodD3153, paragraph 9.1.2, to ensure removal of any coatingpr
15、esent.6.2 Pipet 0.07 oz (2 mL) of polish onto the center of the testpanel. Place the cheesecloth into the polish and allow it toabsorb the emulsion. Distribute the emulsion evenly over thesurface; then draw the cheesecloth downward in smoothseparate strokes, with no more pressure than is exerted by
16、theweight of the hand, until the entire panel has been coated. If 12by 12-in. (304 by 304-mm) tiles are used, pipet 0.12 oz (3.6mL) of polish out the center of each tile.6.3 Apply 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
17、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 andcontrolled using silica gel or calcium chloride as the desiccantor by using a saturated salt solution with a small fan to circulatethe air inside
18、the box. Also place inside the glove box thecrockmeter weighted with a 2.2- lb (1-kg) weight and the greenfelt test pads. Age the tiles and equipment for 24 h at 10 to15 % relative humidity at 75 6 2F (23.9 6 1.1C).6.5 Prepare additional test tiles in the same manner and dryfor24hat776 2F (25 6 1.1C
19、) and 55 6 3 % relativehumidity.NOTE 2Prepared samples may also be tested at 50 6 2F (10 61.1C) and 38 6 3 % relative humidity.7. Procedure7.1 Test the prepared samples at 75 6 2F (23.9 6 1.1C )and 10 to 15 % relative humidity, and at 77 6 2F (25 61.1C) and 55 6 3 % relative humidity.7.2 Place the c
20、oated 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 degree of powder adhering toit. Observe the
21、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 accumulation as seenon both the tile surfac
22、e 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 material suitable fordetermining the bias
23、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 position respecting the validity of any
24、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 responsibility.This standard is subject to revis
25、ion 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 ASTM International Headquarters. Your c
26、omments 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 address shown below.This standard is copyrig
27、hted 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D2048 102
