ALTANA Hoffman Scratch Hardness Tester Manual - Manual (Page 4)

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General Information
The Hoffman Scratch Tester consists of a four-
wheeled carriage, a balanced beam with a
scale of 0-20 arbitrary units and a scratching
tool with a sharp circular rim mounted at 45
0 to
the test surface. a counterweight, allen wrench
and movable weights (riders) both large (100 g)
and small (25 g) are also included. The overall
dimensions of this instrument are 11 x 1 x 1 inches
( 27.9 x 2.5 x 2.5 cm).
General Information