1.1本规程描述了评估油墨、套印清漆或涂层承受化学暴露能力的程序。可能与包装接触的典型化学品包括水、酒精、酸等。具体化学品和选择方法以及测量结果的确定由用户在共同讨论中商定。本实践中列出的各种方法提供了测量和收集信息的方法建议。 1.2以国际单位制表示的数值应视为标准值。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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 包装材料在其生命周期内可能暴露于水、酒精、酸等化学品。如果预计包装材料将暴露于化学品，则油墨或涂层或两者都不能因接触而降解、软化或溶解。 本规程中包括的测试适用于设计为耐特定化学品的表面印刷和涂层材料。 待测试的化学品应与正在印刷或涂层的基材兼容（即不会损坏或降解），或两者兼容。 本实践中详细介绍了四种不同的方法。这些方法表示从方法A到方法D的严重程度越来越高。方法的选择应基于预期的暴露类型。例如，通常在预期偶然暴露的情况下使用浇注方法（方法A），例如化学品溢出或飞溅在材料表面。根据预期的暴露水平（B）和磨损水平（C），当需要耐化学性时，通常使用方法B或C。方法D表示化学品和材料之间的持续接触，并且需要防化学品（例如，如果包装浸入化学品中并在一段时间内暴露于磨损）。 ) 本实践不涉及可接受性标准。这些需要由产品的用户和生产商根据预期的接触类型共同确定。

1.1 This practice describes the procedure for evaluating the ability of an ink, overprint varnish or coating to withstand chemical exposure. Typical chemicals, which may come in contact with the package, include water, alcohol, acid, etc. The specific chemical and method of choice as well as determination of measurement outcome are left to users to agree upon in joint discussion. Suggestions for ways to measure and collect information are offered in the various methods listed in this practice. 1.2 The values stated in SI units are to be regarded as 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== Packaging materials may be exposed to chemicals such as water, alcohol, acid, etc. during their life cycle. If it is anticipated that the packaging material will be exposed to a chemical, it is important that the ink or coating, or both, not degrade, soften, or dissolve as a result of that contact. The testing included in this practice is applicable to surface printed and coated materials designed to be resistant to a specific chemical. The chemicals to be tested should be compatible with (that is, not damage or degrade) the substrate being printed or coated, or both. There are four separate methods detailed in this practice. The methods represent increasing degrees of severity from Method A to Method D. Selection of method should be based on the type of exposure anticipated. For example, the pouring method (Method A) is typically used where incidental exposure is anticipated, such as a spill or splash of chemical on the material surface. Method B or C is typically used when chemical resistance is desired depending on the level of exposure (B) and abrasion (C) anticipated. Method D would represent continual contact between the chemical and material and would need to be chemical-proof, (for example, if the package were to be submerged in the chemical and exposed to abrasion over a period of time.) This practice does not address acceptability criteria. These need to be jointly determined by the user and producer of the product, based on the type of exposure that is anticipated.