DIN ISO 9385:1991
Glass and glass-ceramics; Knoop hardness test; identical with ISO 9385:1990

Standard No.

DIN ISO 9385:1991

Release Date

1991

Published By

German Institute for Standardization

Latest

DIN ISO 9385:1991

Replace

DIN 52333:1978 DIN 52333:1987

Scope

The standard describes the conditions for determining the Knoop hardness of glass and glass ceramics. The Knoop hardness characterizes the behaviour of these materials conerning a permanent change of the surface after identitation of a solid material.

DIN ISO 9385:1991 history

• 1991 DIN ISO 9385:1991 Glass and glass-ceramics; Knoop hardness test; identical with ISO 9385:1990
• 0000 DIN 52333:1987
• 0000 DIN 52333:1978