ASTM D1815-00(R2021) pdf free download

ASTM D1815-00(R2021) pdf free download.Standard Test Method for Water Absorption (Static) of Vegetable Tanned Leather
1. Scope
1.1 This test method covers the determination ofthe amount of water absorbed by leather at 23 6 2 °C by immersion under static conditions. It may be used on all types of leather, but is particularly adapted to vegetable-tanned sole leather. This test method does not apply to wet blue. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
4. Summary of Test Method
4.1 In this test method the amount of water absorbed by a leather specimen is measured at room temperature with all surfaces exposed to water.
5. Significance and Use
5.1 This test method is currently used to determine compli- ance with specifications for water absorption of impregnated sole leather. The significance of the test method is limited by the static conditions employed, and the results do not reflect the water absorption under the dynamic conditions of flexing. The result may be corrected, if required, for any water-soluble material removed from the leather during the test.
6. Apparatus
6.1 Immersion Dish, glass or other noncorrosive material, having a 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 in Section 4 of Test Method D1516. 6.4 Thickness Gauge, conforming to the requirements in Section 4 of Test Method D1813. 6.5 Blotting Paper or Filter Paper. 6.6 Drying Oven. 6.7 Pieces of Glass Rod, for supporting and weighting the specimen. 6.8 Crystallizing Dish, borosilicate glass, 50 mm tall, 70 mm in outside diameter.
7. Test Specimen
7.1 The test specimen shall be a rectangle of leather approximately 2 by 4 in. (51 by 102 mm). 7.2 Unless otherwise specified in the detail specification, one specimen from each test unit of sample shall be tested.
8. Procedure
8.1 Determine the length, width, and thickness of the specimen in accordance with Test Method D1516 and Test Method D1813. Calculate its volume in cubic centimetres. 8.2 Weigh the specimen to the nearest 0.01 g and record this mass as W 1 . 8.3 Place the specimen in the immersion dish in a horizontal position with the grain side up. Support it on glass rods or beads and weighted with pieces of glass rod to keep it immersed. Carefully pour distilled water at 23 6 2 °C into the dish until the specimen is fully immersed, using at least 10 g of water per gram of specimen. 8.4 Leave the specimen immersed for a period of 30 min, 2 h, 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 the specimen immediately to the nearest 0.01 g and record this mass as W 2 . 8.6 If a further immersion time is required, reimmerse the specimen after it has been in the air for a total of 5 min, including the weighing time. The total immersion shall be considered to exclude these 5-min weighing periods. 8.7 If a correction is required for water-soluble material removed during the immersion period, proceed as follows: At the end ofany immersion period stir the water in the immersion dish thoroughly, transfer it to a beaker, and weigh to the nearest 0.1 g. Record the total mass ofthe water as W w . Take an aliquot of 25 mL ofthe water from the beaker, put it in weighed tannin dish, and dry at 105 °C. Weigh the tannin dish and residue and determine the mass ofthe residue.