Typically plotted as a Dynamic Cushioning Curve, Table 1 represents the curves for five different thicknesses of a single polyethylene product for the same drop height.

Second, note the portion of the curve for the chosen thickness which lies on or below the fragility line. This defines a range of static loadings that will provide the desired cushion performance, as shown by the shaded area in Table 2. Any static loading value from within this range can be used in your case design to attain the desired result.

By dividing the weight of your equipment by the chosen static loading value, the result is the number of square inches of foam that should be used to support the product in the package.

By repeating this procedure with several types of cushioning materials, we generate comparisons which allow us to strike an economical balance between cost and case size.