1、Designation: D1815 00 (Reapproved 2015)Standard Test Method forWater Absorption (Static) of Vegetable Tanned Leather1This standard is issued under the fixed designation D1815; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r 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.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This test method covers the
3、 determination of the amountof water absorbed by leather at 23 6 2C by immersion understatic conditions. It may be used on all types of leather, but isparticularly adapted to vegetable-tanned sole leather. This testmethod does not apply to wet blue.1.2 This standard does not purport to address all o
4、f 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. Referenced Documents2.1 ASTM Standards:2D1516 Test Method for W
5、idth of LeatherD1517 Terminology Relating to LeatherD1813 Test Method for Measuring Thickness of LeatherTest Specimens3. Terminology3.1 For definitions of leather terms used in this standardrefer to Terminology D1517.4. Summary of Test Method4.1 In this test method the amount of water absorbed by al
6、eather specimen is measured at room temperature with allsurfaces exposed to water.5. Significance and Use5.1 This test method is currently used to determine compli-ance with specifications for water absorption of impregnatedsole leather. The significance of the test method is limited bythe static co
7、nditions employed, and the results do not reflect thewater absorption under the dynamic conditions of flexing. Theresult may be corrected, if required, for any water-solublematerial removed from the leather during the test.6. Apparatus6.1 Immersion Dish, glass or other noncorrosive material,having a
8、 flat bottom at least 3 by 5 in. (76 by 127 mm).6.2 Balance, sensitive to 0.01 g.6.3 Steel Scale or Tape, conforming to the requirements inSection 2 of Test Method D1516.6.4 Thickness Gage, conforming to the requirements inSection 3 of Test Method D1813.6.5 Blotting Paper or Filter Paper.6.6 Drying
9、Oven.6.7 Pieces of Glass Rod, for supporting and weighting thespecimen.6.8 Crystallizing Dish, borosilicate glass, 50 mm tall, 70mm in outside diameter.7. Test Specimen7.1 The test specimen shall be a rectangle of leatherapproximately 2 by 4 in. (51 by 102 mm).7.2 Unless otherwise specified in the d
10、etail specification,one specimen from each test unit of sample shall be tested.8. Procedure8.1 Determine the length, width, and thickness of thespecimen in accordance with Test Method D1516 and TestMethod D1813. Calculate its volume in cubic centimetres.8.2 Weigh the specimen to the nearest 0.01 g a
11、nd record thismass as W1.8.3 Place the specimen in the immersion dish in a horizontalposition with the grain side up. Support it on glass rods orbeads and weighted with pieces of glass rod to keep itimmersed. Carefully pour distilled water at 23 6 2C into thedish until the specimen is fully immersed
12、, using at least 10 g ofwater per gram of specimen.1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.07 on Physical Properties. Thistest method was developed in cooperation with the American Leather ChemistsAssn. (Standar
13、d Method E30 1956).Current edition approved May 1, 2015. Published July 2015. Originally approvedin 1962. Last previous edition approved in 2010 as D1815 00 (2010). DOI:10.1520/D1815-00R15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servic
14、eastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States18.4 Leave the specimen immersed for a period of 30 min, 2h
15、, or 24 h, as required.8.5 At the end of the immersion period, remove the speci-men and blot the surface water with filter paper. Weigh thespecimen immediately to the nearest 0.01 g and record thismass as W2.8.6 If a further immersion time is required, reimmerse thespecimen after it has been in the
16、air for a total of 5 min,including the weighing time. The total immersion shall beconsidered to exclude these 5-min weighing periods.8.7 If a correction is required for water-soluble materialremoved during the immersion period, proceed as follows: Atthe end of any immersion period stir the water in
17、the immersiondish thoroughly, transfer it to a beaker, and weigh to the nearest0.1 g. Record the total mass of the water as Ww. Take an aliquotof 25 mL of the water from the beaker, put it in weighed tannindish, and dry at 105C. Weigh the tannin dish and residue anddetermine the mass of the residue,
18、 Wr. Calculate the total massof the extracted watersoluble material, W3, as follows:W35Ww3Wr!/25 (1)Return the remainder of the water to the immersion dish andcontinue the test.9. Calculations9.1 Calculate the amount of water absorbed by thespecimen, in grams per cubic centimetre, as follows:Water a
19、bsorbed, g/cm35W22 W1!/V (2)where:W1= mass of the original specimen, g,W2= mass of the specimen after immersion in water, g, andV = volume of the specimen, cm3.9.2 Calculate the amount of water absorbed by thespecimen, in grams per cubic centimetre, after correction forwater-soluble material, as fol
20、lows:Water absorbed, g/cm35W21W3!2 W1#/V (3)where:W3= mass of the material dissolved from the specimen bywater (8.7).10. Report10.1 The report shall include the following:10.1.1 Water absorption of the sample in grams per cubiccentimetre, reported as the average of the amounts of waterabsorbed by th
21、e specimens,10.1.2 Length of time of immersion, and10.1.3 Whether or not a correction has been made forwater-soluble material.11. Precision11.1 Measurements made on consecutive samples of un-treated sole leather sampled in the standard test area can beexpected to yield a standard deviation of 60.02
22、g/cm3in themeasurement of water absorption. A standard deviation of60.04 g/cm3can be expected between measurements fromdifferent hides in a lot sampled in the standard test area.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item men
23、tionedin 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 revision at any time by the responsible technical committee
24、 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 comments will receive careful consideration at a meetin
25、g 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 copyrighted by ASTM International, 100 Barr Harbor Drive, PO
26、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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 00 (2015)2
