ASTM_D_1913_-_00_2015.pdf

Designation:D191300(Reapproved 2015)Standard Test Method forResistance to Wetting of Garment-Type Leathers(Spray Test)1This standard is issued under the fixed designation D1913;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 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 qualitative evaluation of thesurface repellency to water of garment-type leathers.This testmethod does not apply to wet blue.1.2 The values stated in inch-pound units are to be regardedas standard.The values shown in parentheses are provided forinformation only.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 of regulatory limitations prior to use.2.Summary of Test Method2.1 Water is sprayed against the taut surface of the testspecimen under controlled conditions,producing a pattern ofwetting whose size depends on the relative repellency of theleather.Evaluation is accomplished by comparing the wettedpattern with pictures on a standard chart.3.Significance and Use3.1 The procedure is intended primarily to evaluategarment-type leathers.The test method is qualitative andmeasures the surface-water repellency or surface-water resis-tance only.It is not intended for use in determining resistanceto water penetration.A visual means is given to evaluate therelative effects of materials showing water repellency,but nocomparison is possible with conditions found in actual use.4.Apparatus4.1 Spray TesterThe spray tester(see Fig.1 and Fig.2)2shall consist of a standard spray nozzle(19 holes,drill No.65,0.035 in.(0.89 mm)in diameter)connected by means of38-in.(9.5-mm)rubber tubing to the funnel tube of a 6-in.(152-mm)laboratory funnel;and a laboratory ring support which holdsthe funnel directly over the center of a 6-in.(152 mm)metalembroidery hoop mounted on a block of wood so that the planeof a specimen held on the hoop makes an angle of 45 with thehorizontal.The distance of the nozzle to the center of thehoop-mounted specimen shall be 6.0 in.(152 mm).4.2 Rating Chart.25.Test Specimen5.1 The minimum size of the test specimen shall be 7 by 7in.(178 by 178 mm).However,where nondestructive testing ofskins is desired,the entire skin may be used and tested in anyportion of its area.5.2 Conditioning of the specimen prior to testing is notnecessary.6.Procedure6.1 Fasten the specimen securely in the 6-in.(152-mm)metal hoop so that it presents a smooth,wrinkle-free surface.Place the hoop on the stand of the tester so that the surface tobe evaluated is uppermost and in such a position that the centerof the spray pattern coincides with the center of the hoop.1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.04 on Apparel.This testmethod was developed in cooperation with the American Leather Chemists Assn.(Standard Method E57 1963).Current edition approved Sept.1,2015.Published October 2015.Originallyapproved in 1961.Last previous edition approved in 2010 as D1913 00(2010).DOI:10.1520/D1913-00R15.2The sole source of supply of the spray tester with standard spray nozzles,metalhoops,and copies of the rating chart known to the committee at this time isAmericanAssociation of Textile Chemists and Colorists,P.O.Box 12215,ResearchTriangle Park,NC 27709;telephone:(919)549-8141;fax:(919)549-8933.If youare aware of alternative suppliers,please provide this information to ASTMHeadquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.2 Pour 250 mL of water at 80 6 2F(27 6 1C)into thefunnel of the tester and allow it to spray onto the test specimen.This will take approximately 25 to 30 s.6.3 Upon completion of the spraying period,take the hoopby one edge,tap it smartly once against a solid object,thenrotate it 180 and tap once more on the point previously held.6.4 After tapping,compare the wet or spotted pattern withthe rating chart,which is reproduced in Fig.3.Assign the testspecimen a rating corresponding to the nearest standard in therating chart.Intermediate ratings should not be given.7.Report7.1 Report the rating determined in 6.4.8.Precision and Bias8.1 Interlaboratory correlation tests have suggested thatpositional effects within the skin are not large enough to causedifferences in the ordinal scale values.Laboratory-to-laboratory differences greater than one level(10 units)in theordinal scale are not probable.9.Keywords9.1 garment leather;spray testFIG.1 Spray TesterD1913 00(Reappr