ALTANA Buchholz Indentation Tester Operating Instructions: instruction

Measure what you see.

Buchholz Indentation Tester

Buchholz – Härteprüfer

Operating Instructions Betriebsanleitung

Mode d’emploi

Инструкция по применению

Buchholz Indentation

Tester

Cat. No. PH-5825, PH-5826

Buchholz - Härteprüfer

Best.-Nr. PH-5825, PH-5826

Appareil d’indentation

Buchholz

o

N

Ref. PH-5825, PH-5826

199 016 742 EDFR 0808

Твердомер Бухгольца

Кошка. Номер PH-5825,

PH-5826

Buchholz Indentation Tester

Cat. No. PH-5825, PH-5826

1.0 General

1.1 Reference Value

1.2 Indentation Tester

1.3 Evaluation

1.4 Requirements for the

Buchholz Indentation Test

2.0 Test Procedure

3.0 Ordering Guide

3.1 Technical data

Technical data are subject to alterations.

1.0 General

1.1 Reference Value

1.3 Evaluation

The reference value for the deter-

A measuring microscope is used

mination of the hardness

to examine and measure the

according to Buchholz ISO 2815

indentation in the paint lm. The

and DIN EN ISO 2815 is the

microscope is tted with a

reciprocal of the indentation length

graduated scale capable of

produced when a circular shaped

reading to 0.1 mm and with lamp

cutter blade of dened prole and

illumination having an angle

dimension is applied to a paint lm

of more than 60°. This angel

under a dened load.

produces a shadow area over the

total length of the indentation.

1.2 Indentation Tester

1.4 Requirements for the

Buchholz Indentation Test

The indentation tester consists of

a double cone block with a circular

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

shaped cutter blade made of

hardened tool steel.

2. The substrate of the lm must not

It acts on the lm surface with an

deform under test load.

effective load of 500 g ± 5 g.

3. During the indentation test the

Table 1: Indentation Resistance (DIN EN ISO 2815)

paint lm generally should show a

plastic but no considerable elastic

100 mm

=

deformation. An elastic deformation

Indentation Length

could simulate high indentation

resistance because no or only

an insignicant indentation mark

Identation

Indentation

Absolute

Lower

Upper

Identation

Minimum

would remain after removing the

length

resistance

value of

limit

limit

depth *

coating

indentation tester from the paint

error

thickness

(mm)

a

(Δa

)

(a

)min

(a

)max

(µm)

(µm)

lm.

B

B

B

B

0,4 250,0 62,5 187,5 312,5 1 3

4. The paint lm must have a uniform,

0,5 200,0 40,0 160,0 240,0 2 6

clean and smooth surface.

0,6 166,7 27,8 138,9 194,4 3 9

0,7 142,9 20,4 122,4 163,3 4 12

5. The table shows the correlation

0,8 125,0 15,6 109,4 140,6 5 15

between identation lenght (in mm),

0,9 111,1 12,3 98,8 123,5 7 20

the indentation depth (in µm) and

1,0 100,0 10,0 90,0 110,0 8 20

the minimum coatings thickness

1,1 90,9 8,3 82,6 99,2 10 20

(µm), for which the measurement is

valid.

1,2 83,3 6,9 76,4 90,3 12 25

Measurements outside of these

1,3 76,9 5,9 71,0 82,8 14 25

tolerances cannot be considered.

1,4 71,4 5,1 66,3 76,5 16 30

1,5 66,7 4,4 62,2 71,1 19 30

1,6 62,5 3,9 58,6 66,4 21 35

1,7 58,8 3,5 55,4 62,3 24 53

1,8 55,6 3,1 52,5 58,6 27 40

1,9 52,6 2,8 49,9 55,4 30 40

2,0 50,0 2,5 47,5 52,5 33 45

* rounded off to full µm