For Staple Measurements how is the Position of Break calculated?

The measurement of Staple Strength involves measuring the force required to break appoximately 55-60 staples, selected at random from the grab sample, which is displayed on the show floor. When each staple is broken, the two portions are collected and weighed.

The Position of Break (POB) of each staple is calculated from the weights the two portions, with corrections applied to allow for grease, wax, suint, dirt and vegetable matter contamination. The POB can then be estimated from the ratio of the corrected weights.

POB is reported as the percentage of all staples measured that break in the Tip, Middle and Base regions of the staple.