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Table 1 Summary of materials with hardness and water absorption; data provided by manufacturer

From: Assessment of early onset surface damage from accelerated disinfection protocol

Material Hardness (Hardness rating) Water absorption
HDPE Durometer 60D (Medium) Not rated
ABS Rockwell R100 (Hard) 0.65%
EPDM Durometer 40A (Medium soft) Not rated
LDPE Durometer 40D (Medium soft) Not Rated
Formica Rockwell M100 (Extra hard) 1.20%
PC Rockwell R120 (Hard) 0.25