1.1 本指南为在人工施用的试验食品土壤中测量轻型洗手液产品泡沫稳定性的几种技术提供了指南。它旨在作为一种实验室筛选测试，以帮助产品的配方、质量控制，并作为配方制定者和供应商之间标准化洗涤剂泡沫稳定性的基础。 1.2 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全和健康措施，并确定监管限制的适用性。 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者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。 1.3 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====== 3.1 目前制定的指南不适用于洗手产品的排名，因为目前还没有依据将使用任何特定食物土壤或土壤组合的这些产品的泡沫稳定性与消费者的性能排名相关联。 3.2 洗手液产品的相对泡沫稳定性等级将因测试中使用的食物土壤类型而异。因此，试验中使用的标准食用土的选择应由相关方根据经验达成协议。 3.3 该实验室筛选指南包括几个领域的灵活性，以便允许最大数量的实验室使用，而无需购买大量额外设备。因此，应该认识到，特定设备的差异可能会导致实验室间和操作员间精度的降低，必须谨慎评估这些结果。

1.1 This guide provides guidelines for several techniques of measuring the foam stability of light-duty hand dishwashing detergent products in the presence of artificially applied test-food soils. It is intended as a laboratory screening test to aid in the formulation of products, for quality control and as a basis between the formulator and supplier in standardizing foam stability of the detergents. 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 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. 1.3 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 ====== 3.1 The guide, as now constituted, is not suitable for ranking of hand dishwashing products, since no basis is available at this time for correlation of the foam stability of these products using any particular food soil or combination of soils with consumers' ranking of performance. 3.2 The relative foam stability ranking of hand dishwashing detergent products will vary greatly depending on the type of food soils used in the test. Therefore, selection of the standard food soil to be used in a test shall be made by agreement between the interested parties on the basis of experience. 3.3 This laboratory screening guide includes flexibility in several areas so as to allow its use by the maximum number of laboratories, without purchase of significant additional equipment. It should be recognized, therefore, that differences in specific equipment may result in a reduced level of interlaboratory and inter-operator precision, and such results must be evaluated with caution.