BS 873-1:1983

Foreword
Cooperating organisations
Methods
1. Scope
2. Definitions
3. Test samples of sign face sheet materials or
     sign face materials
4. Photometric properties
5. Measurement of coefficient of retroreflection (R')
6. Colorimetric properties
7. Impact resistance
8. Wind resistance
9. Resistance to twisting
10. Strength of bond between sign face sheet material
     and sign plate material
11. Strength of bond between sign faces and solid
     glass beads
12. Resistance to solvents
13. Corrosion resistance to saline solution
14. Corrosion resistance to sulphur dioxide
15. Resistance to weathering
16. Measurement of coefficient of retroreflection of
     wet retroreflective signs after exposure
17. Measurement of coefficient of retroreflection of
     dirty retroreflective signs after exposure
Appendix
A. Relationship between the Regulations, the Traffic
     Signs Manual and BS 873
Table
1. Impact tests
Figures
1. Areas for determining luminance gradient
2. Plan of arrangement of apparatus for measuring
     the coefficient of retroreflection
3. Arrangement of apparatus for measurement of
     resistance to impact of internally illuminated
     sign panel and luminaire face panel materials
4. Arrangement of apparatus for measurement of
     resistance to impact of non-internally illuminated
     sign plate material
5. Assembly of specimens for bond strength test
     (sheet materials)
6. Arrangement for testing bond strength of solid
     glass beads
7. Apparatus for sulphur dioxide test
8. Apparatus for accelerated weathering test
9. Typical arrangement of atomizers as used in
     accelerated weathering test
10. Test arrangement for measurement of coefficient
     of retroreflection of wet retroreflective samples

Describes general test procedures for signs and bollards, including photometric tests, general strength tests and tests for assessing resistance to weathering and corrosion. Definitions of terms used in all Parts are included.