Altana Buchholz Indentation Tester Operating Instructions Bedienungsanleitung PDF herunterladen (Seite 4)

1.0 General

1.1 Reference Value

The reference value for the deter-

mination of the hardness

according to Buchholz ISO 2815

and DIN EN ISO 2815 is the

reciprocal of the indentation length

produced when a circular shaped

cutter blade of dened prole and

dimension is applied to a paint lm

under a dened load.

1.2 Indentation Tester

The indentation tester consists of

a double cone block with a circular

shaped cutter blade made of

hardened tool steel.

It acts on the lm surface with an

effective load of 500 g ± 5 g.

1.3 Evaluation

A measuring microscope is used

to examine and measure the

indentation in the paint lm. The

microscope is tted with a

graduated scale capable of

reading to 0.1 mm and with lamp

illumination having an angle

of more than 60°. This angel

produces a shadow area over the

total length of the indentation.

1.4 Requirements for the

Buchholz Indentation Test

1. A paint lm of sufcient thickness.

2. The substrate of the lm must not

deform under test load.

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Altana Buchholz Indentation Tester Operating Instructions Bedienungsanleitung Seite 4