This test is used to determine the dew point, which is the temperature to which air must be cooled (at constant pressure) so that the relative humidity becomes 100%. Condensation formation begins at the dew point and is to be avoided, since excess condensation on containers has several undesirable effects: Failure of cardboard and paperboard secondary packaging Peeling labels External container and packaging odors Closure odor formation on bottles Failure of pallet stacks Odor and decay of wooden palletsOnce the dew point is known, the warmer can be adjusted to the correct temperature to maintain finished product container temperature above the dew point, thereby eliminating condensation formation. Note: Product temperature should not exceed the dew point by more than 3 °C (5 °F). This is to minimize impact to product flavor and sweetener, and CO2 retention in PET. (Do not exceed 50 °C (120 °F) in PET.)As a result of warming, the pressure within the container increases, which contributes to container strength and rigidity, as well as pallet stack stability.
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