BS 903-A26:1995

Committees responsible
National foreword
Introduction
Method
1. Scope
2. Normative references
3. Principle
4. Definitions
5. Apparatus
6. Test pieces
7. Time-interval between vulcanization and testing
8. Conditioning of test pieces
9. Temperature of test
10. Procedure
11. Number of readings
12. Expression of results
13. Precision
14. Test report
Annexes
A. (normative) Empirical relationship between
     indentation and hardness
B. (informative) Guidance for using precision results
Tables
1. Forces and dimensions of apparatus
2. Minimum distance of point of contact from edge of
     test piece
3. Conversion of values of D into international rubber
     hardness degrees (IRHD) for use in method N
4. Conversion of values of D into international rubber
     hardness degrees (IRHD) for use in method H
5. Conversion of values of D into international rubber
     hardness degrees (IRHD) for use in method L
6. Type 1 precision, medium-hardness rubbers, method N
7. Type 1 precision, medium-hardness rubbers, method M
8. Type 1 precision, high-hardness rubbers, method N
9. Type 1 precision, high-hardness rubbers, method H
10. Type 1 precision, low-hardness rubber, method L
Figures
1. Range of applicability
A.1 Relationship between log 10E and hardness in IRHD
     from 3 to 100
A.2 Relationship between log 10E and hardness in IRHD
     from 3 to 40
A.3 Relationship between log 10E and hardness from 80
     to 100

Specifies four methods for the determination of the hardness of vulcanized or thermoplastic rubber.