BS EN ISO 5404-2011 pdf download

BS EN ISO 5404-2011 pdf download.Leather – Physical test methods – Determination of water resistance of heavy leathers (ISO 5404:2011). 7.1 General 7.1.1 Weigh the test piece, m0, to the nearest 0,001 g. 7.1.2 Determine the thickness in accordance with ISO 2589. 7.1.3 Place the cotton gauze (5.2) on the platform and adjust the flow of water to give a flow of 7,5 mI/mm ± 2.5 mI/mm over the platform. 7.1.4 Lay the test piece on the gauze with the roughened surface downwards and attach the narrow ends to the platform and roller 7.1.5 Press the test piece on the roller with a force of 80 N ± 5 N. 7.1.6 Set the roller in motion and record the time. 7.2 Determination of penetration time Note the time at which water is clearly seen on the leather surface adjacent to the roDer, ignoring any penetration that occurs within an area 5 mm from the edge of the test piece. An acoustic or optical signal may be used to help detect initial water penetration, but the effective penetration of water shall be checked by visual observation. 7.3 Determination of water absorption 7.3.1 At the end of a specified period of time (i.e. 15 mm, 30 mm, 60 mm or when penetration of water occurs), stop the machine, remove the test piece and blot it lightly with filter paper to remove water adhering to the surface, taking care not to force water out of the sample. Weigh the test piece, m1, to the nearest 0,001 g. 7.3.2 If the determination of water absorption after longer periods of time is required, return the test piece to the machine and continue the test. 7.3.3 Repeat the procedure until the test is completed (see 7.5.4). 7.4 Determination of area of penetration 7.4.1 At the end of the first hour of testing, stop the machine and remove the test piece. Lay the transparent overlay over the upper surface of the test piece and estimate the total area of penetration by comparing the wetted areas, if any, with the areas marked on the overlay. If visual examination shows that wetting of the upper surface starts from the edge, then the test shall be regarded as invalid and repeated with a fresh test piece. 7.4.2 If a determination of the area of penetration after longer periods of time is required, return the test piece to the machine and...