ISO 2589-2016 pdf free download.Leather- Physical and mechanical tests – Determination of thickness.
ISO 2589 specifies a method for determining the thickness of leather. The method is applicable to all types of leather of any tannage. The measurement is valid for both the whole leather and a test sample.
2 Normative references
The following documents, in whole or in part. are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2418, Leather — Chemical, physical and mechanical and fastness tests — Sampling location ISO 2419, Leather — Physical and mechanical tests — Sample preparation and conditioning
3 Principle
The leather is placed in a gauge under a specified load for a specified time and the thickness read directly.
4 Apparatus
4.1 Test machine, including the following:
4.1.1 Gauge, graduated to read to 0,01 mm directly with an accuracy of ± 0,02 mm over the whole scale length.
4.1.2 Anvil, comprising the flat horizontal surface of a cylinder of diameter 10,00 mm ± 0,05 mm projecting 3,0 mm ± 0,1 mm above the surface of a concentric flat circular platform of diameter 50,0 mm ± 0,2 mm.
NOTE The circular platform of 50 mm diameter helps to support medium weight leathers which otherwise presents a convex surface to the presser foot. The anvil is raised 3 mm above the platform so that errors are avoided in measurements on heavy leathers which are not flat.
4.1,3 Presser foot, having a flat circular surface of diameter 10,0 mm ± 0,05 mm. coaxial with the anvil and capable of movement normal to the face of the anvil. The contacting surfaces of the anvil and presser foot shall be dead weight loaded with 393 g ± 10 g. Movements of the presser foot shall give a direct reading of the movement on the gauge (4.1.3).
4.1.4 Rigid stand, to hold the gauge (4.1.1), anvil (4.1.2) and presser foot (4.1.3).
5 Sampling and sample preparation
5.1 Official sample in accordance with ISO 2418. Five measurements to be taken, distributed across
the sample.
5.2 Sample prepared for other tests. Three measurements to be taken, distributed across the sample.
5.3 Sample of unknown origin. Five measurements to be taken, distributed across the sample.
5.4 For very heavy, firm leathers, a smaller sample is recommended to avoid curvature. Three
measurements to be taken, distributed across the sample.
5.5 For whole hides, five measurements for each location should be taken. Condition all samples in
accordance with ISO 2419.
6 Procedure
Place the apparatus on a flat, horizontal surface. Place the sample in the gauge grain side up if this can be identified. If the grain cannot be identified place the sample in the gauge with either surface upwards. Apply the load gently and record the thickness 5 s ± 1 s after full loading is reached.
7 Expression of results
The results shall be expressed as the arithmetic mean and range to the nearest 0,01 mm.
8 Test report
The test report shall include the following:
a) a reference to this International Standard, i.e. ISO 2589;
b) the results obtained expressed to the nearest 0,01 mm;
c) the standard atmosphere used for conditioning and testing as given in ISO 2419;
d) any deviations from the method specified in this International Standard;
e) full details for identification of the sample.ISO 2589 pdf download.