Conditioning
This chapter describes procedures used to confirm that test samples represent common recent experience with environmental conditions that might affect the values obtained when they are tested. Temperature and relative humidity are the most common variables to control to provide such assurance. For the purpose of simply eliminating environmental effects as a source of measurement error, a set of standard temperature and relative humidity conditions apply for most flexible packaging materials. The time needed to equilibrate to stand conditions may vary with material. For those applications that are dependent on environmental conditions for their functionality (e.g., antistatic or antifog additives) materials must be conditioned at ...
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