The Wallace Compression Set Apparatus (Constant Strain) - C3/C4
British Standard Model - C3
Single daylight (2 plate) C3/1
Double daylight (3 plate) C3/2
Triple daylight (4 plate) C3/3
British Standard Model - C4
Single daylight (2 plate) C4/1
Double daylight (3 plate) C4/2
Triple daylight (4 plate) C4/3
Definition
The set is the residual strain in a rubber test piece after it has been subjected to stress for a given time and then allowed to recover for a given time, the temperature being substantially constant during the test. 'Compression Set' is the residual compression strain after compression, (a) to a given compression strain, or (b) a given compression stress.
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