Compression Force Deflection (CFD) vs. Shore Hardness

Why is the hardness characteristic of PORON® materials reported as Compression Force Deflection (CFD) instead of a Shore measurement? For reasons of usefulness and specification, CFD is better suited to describe PORON products.

C.F. Deflection vs. Shore Hardness

PORON Urethane Compression Force Deflection Curves
Charts for Compression Force Deflection (strain rate 0.1 in/min)

Poron CFD Curves

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