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ISO 6133:2015 specifies five methods of calculating, after testing, the tear strength and the adhesion strength of vulcanized rubber or fabrics coated with or adhered to rubber or plastics. The results are calculated by determining the median and range of peak values from a graphical plot of force versus time recorded during the test.

A trace for an adhesion strength test or tear strength test can show few or many force peaks, depending on the material under investigation. The choice of the method of calculation depends on the number of peaks in the trace.

The purpose of this International Standard is to obtain more uniformity in the evaluation and presentation of test results. It is applicable only, however, when specified in another International Standard, i.e. a method of test or a specification.

For other details, such as apparatus, test piece preparation, conditioning, procedure, etc., requirements given in the relevant International Standard shall apply.

NOTE In certain cases, the methods of analysis given might not be adequate, for example, for peak values showing a trend with time. In cases where the minimum force values are of interest, it is possible to use the same methods of calculation as when determining from a range of peak values.