1.1 该测试方法涵盖了包装密封中宽度为75 μ m[0.003 in.]的通道的测定，概率为60-100%（参见 8 ). 1.1.1 视觉检测包装密封中的通道缺陷的能力高度依赖于通道的尺寸、密封和未密封区域的对比程度、两个包装层之间的粘合剂的量和类型、反射光角、所用材料的类型、放大倍数的使用以及检查员的培训和经验水平。 1.2 该测试方法适用于具有至少一面透明的包装，以便可以清楚地看到密封区域。 1.3 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值可能不完全等同；因此，每个系统应独立使用。合并两个系统的值可能导致不符合标准。 1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 密封属性可以直接链接到工艺参数、设备或材料以及环境（室温和相对湿度）中的许多变量。目视密封特征和缺陷可以提供包装完整性和生产密封问题的证据。 5.2 视觉密封缺陷通常是热密封过程变化的第一个迹象。在物理封装性能测试之后，它们还将指示封装完整性的缺乏或潜在损害。

1.1 This test method covers the determination of channels in the package seal down to a width of 75 μm [0.003 in.] with a 60–100 % probability (see Section 8 ). 1.1.1 The ability to visually detect channel defects in package seals is highly dependent on the size of channel, the degree of contrast from sealed and unsealed areas, the amount and type of adhesive between the two package layers, reflecting light angle, types of material used, the use of magnification, and the inspector's level of training and experience. 1.2 This test method is applicable to packages with at least one transparent side so that the seal area may be clearly viewed. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.4 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. 1.5 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 Seal attributes can be linked directly to a number of variables in process parameters, equipment, or material, as well as environmental (room temperature and relative humidity). Visual seal characteristics and defects can provide evidence of package integrity and production sealing problems. 5.2 Visual seal defects often will be the first indication of heat sealing process variation. They also will indicate a lack of, or potential compromise to, package integrity after physical package performance testing.