ALTANA Buchholz Indentation Tester Operating Instructions User Manual
Page 5
3. During the indentation test the
paint film generally should show a
plastic but no considerable elastic
deformation. An elastic deformation
could simulate high indentation
resistance because no or only
an insignificant indentation mark
would remain after removing the
indentation tester from the paint
film.
4. The paint film must have a uniform,
clean and smooth surface.
5. The table shows the correlation
between identation lenght (in mm),
the indentation depth (in µm) and
the minimum coatings thickness
(µm), for which the measurement is
valid.
Measurements outside of these
tolerances cannot be considered.
Identation
length
(mm)
Indentation
resistance
a
B
Absolute
value of
error
(Δa
B
)
Lower
limit
(a
B
)min
Upper
limit
(a
B
)max
Identation
depth *
(µm)
Minimum
coating
thickness
(µm)
0,4
250,0
62,5
187,5
312,5
1
3
0,5
200,0
40,0
160,0
240,0
2
6
0,6
166,7
27,8
138,9
194,4
3
9
0,7
142,9
20,4
122,4
163,3
4
12
0,8
125,0
15,6
109,4
140,6
5
15
0,9
111,1
12,3
98,8
123,5
7
20
1,0
100,0
10,0
90,0
110,0
8
20
1,1
90,9
8,3
82,6
99,2
10
20
1,2
83,3
6,9
76,4
90,3
12
25
1,3
76,9
5,9
71,0
82,8
14
25
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
Table 1: Indentation Resistance (DIN EN ISO 2815)
=
100 mm
Indentation Length