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Specifies a method to measure the breaking strength of a self adhesive tape when it is subjected to a tensile force sufficient to cause it to break. The breaking strength of adhesive tape is of values as an indication of its uniformity and quality, and its ability to withstand stressess during application and use. The maximum width of adhesive tape tested by this method is 25 mm. For adhesive tapes of this width or less, the breaking strength measured corresponds to that as supplied commercially, with factory-cut edges. For adhesive tapes wider than 25 mm, this test method provides for the adhesive tape to be cut down the 25 mm with a well-sharpened instrument. In such cases, because of the better cutting of the edges, the results can be higher than would be found on commercial tape.