Hardness Testing

Room: 74 deg F, 49% hum
Specimen: room conditions
Room: 68 deg F, 24% hum
Specimen: -30 deg F (avg temp over test period)
Rockwell Hardness
R Scale

ASTM D785
Procedure A
Tested perpendicular to molding
top: molded, flat
bottom: machined, flat

92 117
92.5 113
93.5 112
94.5 112
98 111
92.5 109
90  
Average HRR Value 93 112
Standard Deviation 1.8 2.4