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This specification defines the standard temperature and humidity for conditioning and testing of materials at nominally ambient conditions. Materials for conditioning and testing include material containing paper and plastic material. The instruments and techniques used to measure these standard conditions of temperature and humidity must be validated.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Significance and Use
4.1 Conditioning is used to minimize the variation in test results that may result from fluctuations in temperature and humidity, or both. Many flexible packaging materials or components of flexible packaging materials, particularly materials that are hygroscopic, undergo changes in physical properties as the temperature and the relative humidity (RH) to which they are exposed are varied.
4.2 Many packaging materials do not exhibit a meaningful change in physical properties across the temperature and humidity range that is generally found in office and general laboratory settings. As a result, conditioning of samples is often not required in order to achieve useful test results and is often bypassed during routine testing.
4.3 Conditioning should be considered when (a) comparing between or among laboratory results (for example, supplier and customer), (b) temperature or humidity is anticipated to have an effect on the test outcomes, or (c) potential sources of variation in test results must be minimized.
4.4 Temperature and humidity alone are not sufficient to completely define a storage condition. Many other factors may be relevant (such as time, light, and atmospheric pressure) that are not defined in this specification.
1.1 This specification defines the standard temperature and humidity for conditioning and testing of flexible barrier packaging and flexible barrier packaging materials at nominally ambient conditions.
1.2 There are many other temperature and humidity conditions that may be appropriately used to test end use conditions (such as freezer, refrigerated, or abusive storage). These need to be individually established and are not in the scope of this practice.
1.3 Only those materials that fall under the general area of flexible barrier packaging materials are included in this practice.
1.4 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4332 Practice for Conditioning Containers, Packages, or Packaging Components for Testing
F17 Terminology Relating to Flexible Barrier Packaging
F2825 Practice for Climatic Stressing of Packaging Systems for Single Parcel Delivery
ICS Number Code 19.040 (Environmental testing)
UNSPSC Code 24120000(Packaging materials)
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ASTM E171 / E171M-11(2015), Standard Practice for Conditioning and Testing Flexible Barrier Packaging, ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top