Altana Hoffman Scratch Hardness Tester Short Instructions Bedienungsanleitung PDF herunterladen (Seite 2)

Measure what you see.

Additives & Instruments

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BYK-Gardner USA · 9104 Guilford Road · Columbia · MD 21046 · USA · Phone +1-301-483-6500 · Fax +1-301-483-6555 · www.byk.com/instruments

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ENGLISH

• The large rider weight produces a load of 100 grams

per increment

• The small rider weight produces a load of 25 grams

per increment

• Attach the rider weight(s) to the scale arm with

the arrow pointing left to the desired scale marker

Hoffman Scratch Tester

Operation

Operating the Instrument

Adjusting the Load

• Place your hand on the roller carriage with thumb and

foreﬁnger over the roller closest to the scratching tool

• Apply sufﬁcient downward pressure so that the end of

the scale arm is lifted off the surface into an approximately

horizontal position

• While maintaining downward pressure pull the roller

carriage in the direction opposite the scale arm

Example:

Adhesion = The force required to scrape a path through the ﬁlm,

when the stylus begins its motion on an uncoated portion of the panel

Scratch Hardness = The force necessary to cut through the ﬁlm to the

substrate.

total load = (100 X 15) + (25 X 7) = 1675 grams

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Altana Hoffman Scratch Hardness Tester Short Instructions Bedienungsanleitung Seite 2