5. Significance and Use
5.1 The Knoop indentation hardness is one of many properties that is used to characterize ceramic whitewares. Attempts have been made to relate Knoop indentation hardness to tensile
strength, grinding speeds, and other hardness scales, but no
generally accepted methods are available. Such conversions
are limited in scope and should be used with caution, except for
special cases where a reliable basis for the conversion has been
obtained by comparison tests.