BS 903-A10(1999) : 1999

1 Scope
2 Normative references
3 Apparatus
4 Test pieces
      4.1 Shape, dimensions and preparation
      4.2 Preparation of test pieces for cut growth measurement
      4.3 Time interval between vulcanization and testing
      4.4 Conditioning
      4.5 Number of test pieces
5 Test conditions
      5.1 Temperature
      5.2 Humidity
6 Procedure
      6.1 General
      6.2 Determination of flex cracking
      6.3 Determination of crack growth
7 Expression of results
      7.1 Determination of flex cracking
      7.2 Determination of crack growth
8 Precision
9 Test report

Defines a method of test intended for use in comparing the resistance of rubbers to the formation and growth of cracks, when subjected to repeated flexing on the De Mattia type machine. For determination of crack growth, an artificial cut is made in the test piece to initiate cut growth.