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Status:Closed    Asked:Jul 06, 2011 - 10:53 AM


If our packaged-products will not be stacked, do we have to perform a compression test?

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Several ISTA Procedures and Projects call for compression testing and compression conditioning. The formulas to calculate the test load during these test methods include a value for stack height. An example of such a formula - this one shown in several procedures and is for an Apply and Hold testing using a compression test system - is:

Wt x (S-1) x F

Where Wt is the weight of the packaged-product
S is the number of packaged-products in a stack and
F is the compensating factor

If nothing is to be stacked on top of the packaged-product at any time, that would mean the S value is "1". Plugging that into the formula above, your test load would calculate to zero, therefore no comprerssion test would be required.

Source: ISTA Staff


Jul 06, 2011 - 10:56 AM

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