BS ISO 6133 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.
Before conducting BS ISO 6133, it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.