hard

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hard

adjective Indurated; firm.
References in periodicals archive ?
Mohs assigned numbers to the various hardnesses, laying down the rule that a mineral can scratch all minerals with lower hardness numbers than its own.
B-J12//] = values of Janka and Brinell hardnesses of the wood specimens for the cross section at MC of 12 percent, respectively (N, Number); [H.
Shore A hardnesses range from 50 to 95, depending on ap-plication and speed.
New general-purpose injection-grade polyester TPUs have hardnesses of 70 A to 65 D.
These new Versaflex OM1040 and OM1060 alloys are available in hardnesses of 40 and 60 A.
More recently the durability of prime carpet foam has been improved by producing higher density grades with hardnesses lower than before.
This acrylate polymer can also be used with various plasticizers to flexibilize ASA resins and obtain Shore D hardnesses from 60 to less than 10.
Plastic cleaning media can be bought in a wide variety of hardnesses, densities and sieve sizes to meet a wide range of cleaning applications.
The initial Uniprene offering includes five grades with hardnesses of 55-87 Shore A and 40-50 Shore D.
After aging at 200 [degrees] C for 168 hours, the hardness of QA was 83 and different from that of the other ACMs, whose hardnesses were all near 100.