1.1 本试验方法涵盖当皮革弯曲或折叠时，皮革抗开裂性的测定，皮革的纹理（或饰面）表面位于弯曲处的外侧。重型皮革（例如，线束、皮带、皮带、袋子、箱子等）通常使用机械阻力（例如，夹钳、虎钳等）或手动绕心轴弯曲。较轻的皮革（例如，鞋面、软垫、服装、手套等）在冷却到低温后通常会发生急剧的双折（横向）弯曲。本试验方法不适用于蓝湿革。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本试验方法旨在通过/失败的基础上确定皮革粒面或饰面的抗裂性。本试验方法试图复制皮革在扣架或其他锚固装置周围弯曲、在接缝或贴边中折叠等可能遇到的条件。 皮革的抗裂性受许多因素的影响，如加脂材料的数量、位置和类型；含水量；厚存在缺陷或疤痕组织，或两者兼有；皮肤或皮下组织存在加工损伤；完成系统制定等。本试验方法适用于制革厂的制造控制、规范验收和最终产品制造厂的质量控制。

1.1 This test method covers the determination of the resistance of leather to cracking when the leather is bent or folded with the grain (or finish) surface on the outside of the bend. Heavy leathers (for example, harness, belt, strap, bag, case, and so forth) are usually bent around a mandrel using either mechanical resistance (for example, clamp, vise, and so forth) or by hand. Lighter leathers (for example, shoe upper, upholstery, garment, glove, and so forth) are usually given a sharp double-fold (crosswise) bend after cooling to a low temperature. This test method does not apply to wet blue. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This test method is designed to determine the cracking resistance of the grain or finish surface of leather on a pass/fail basis. This test method attempts to replicate the conditions that may be encountered by leather that is bent around a buckle frame or other anchoring device, folded over in seams or welts, and so forth. The cracking resistance of leather is influenced by many factors such as quantity, location, and type of fatliquoring materials; moisture content; thickness; the presence of defects or scar tissue, or both; the presence of processing damages to the skin or hide tissue; finish system formulation, and so forth. This test method is useful for manufacturing control in the tannery, specification acceptance, and quality control in the end product manufacturing plant.