BS 5131-5.2:1990

Foreword
Committees responsible
Method
1 Scope
2 Principle
3 Apparatus
4 Preparation of test specimens
5 Procedure
6 Calculations and expression of results
7 Test report
Figures
5.2/1 Diagram of apparatus
5.2/2 Location of test specimens from the sole and
       positions of lines AA, A'A' and BB
5.2/3 Marking of lines on test specimens and
       arrangement and marking of test points
5.2/4 Typical indentation graph for an under-vulcanized
       position on a sole
5.2/5 Graphs indicating extremes of vulcanizations for
       a satisfactory vulcanized position on a sole

Describes a method for determining whether moulded-on rubber soles have been satisfactorily vulcanized, and that the undercure is not excessive. The test is suitable for routine quality control work and is simple to carry out. Any direct moulding compound which shows a significant difference in hardness between the cured and uncured state can be tested by this method.

This Section of BS 5131 describes a method for determining whether moulded-on rubber soles have been satisfactorily vulcanized. Because of the method of manufacture, the outer side of the sole adjacent to the heated metal mould is fully cured but the inner side, next to the insole, is usually not fully cured. Some undercure next to the insole is acceptable and even desirable to ensure good adhesion; the purpose of this test is to establish that the undercure is not excessive. The test is suitable for routine quality control work and is simple to carry out.

Any direct moulding compound which shows a significant difference in hardness between the cured and uncured state can be tested by this method.