ASTM D4332-13 pdf free download.Standard Practice for Conditioning Containers, Packages, or Packaging Components for Testing.
1.1 This practice provides for standard and special conditioning and testing atmospheres that may he used to simulate particular field conditions that a container, package, or packaging component may encounter during its litè or testing cycle.
1.2 This practice describes procedures for conditioning these containers, packages, or packaging components so that they may reach equilibrium with the atmosphere to which they may be exposed.
3. Terminology
3.1 Terms and definitions used in this practice may be found in Terminology D996, Terminology E4 1 or Specification E171.
4. Significance and Use
4.1 Many materials from which containers and packages are made, especially cellulosic materials, undergo changes in physical properties as the temperature and the relative humidity (RH) to which they are exposed are varied. Therefore, the package should be placed and kept in a specified atmosphere for a length of time such that subsequent measurements of physical properties will he meaningful and reproducible.
4.2 The conditions described in this practice are either historically accepted standard conditions or special laboratory conditions chosen to represent particular phases of’ the distribution environment. These special conditions do not necessariiy duplicate actual field conditions, hut tend to simulate them and have effects on packages and materials which may he related to their fIeld performance.
5. Atmospheric Conditions
5.1 Preconditioning Aimosphere—20 to 40°C (68 to 104°F) and 10 to 35 % relative humidity.
5.2 Standard Conditioiiing Atmosphere— 23 ± 1°C (73.4 ± 2°F) and 50 ± 2 % relative humidity.
Note 1—Average values must fall within these limits. Short-term fluctuations and measurement limitations may cause individual measurements to vary up to ±2°C (±3.6°F) and ±5 % relative humidity without significant impairment of test precision.
Nom 2—The standard conditioning in the United States is different than in many other countries that use the ISO 2233 conditions.
5.3 Environmental C’onditioiiiizg Atmosphere—The environmental conditions shown in Table I may be selected when appropriate.
Nom 3—In the absence of a specitic requirement ftr a particular atmospheric condition, use the conditioning atmosphere given in 5.2.
Noit 4—Conditioning at the desert condition (see Table 1) at a constant temperature of 60°C (140°F) may have effects on sonic materials that do not relate to effects of cyclical tIeld conditions.
5.4 The measurement of temperature and relative humidity of the conditioning atmosphere shall be made as close to the specimen being exposed as is possible. (See Test Method E337 for a detailed description of methods.) The temperature and relative humidity indicated at the control point, may not be representative of conditions elsewhere in the conditioned space due to local effects or deficiency in air circulation. Tolerances at the controller usually must be smaller than those at the specimen.ASTM D4332 pdf download.