ROBAX
®
Glass Ceramic Panels
Technical Delivery Specification TL 1 00 05 51 - 00
Page
10 / 24
ROBAX
®
registered trademark(s) of SCHOTT AG, Mainz, Germany.
Passing this on or copying without authorization, even portions thereof,
may be grounds for damage proceedings and criminal proceedings.
Copyright protected.
Status:
10/04
replacing:
07/97
3.2.1
Bubbles
Bubbles are gaseous inclusions within the glass ceramic material. Closed bubbles
can appear as low-spots on the surface depending on their size and position within
the glass. Open bubbles are open towards the panel surface and are not
permissible if bigger than 1 mm. The production of material totally free of bubbles is
not possible due to the production process. Table 3.2 contains the permissible
number of closed bubbles in dependence of their length and the panel size.
Panel Size
A
Characteristic’s
Length
L
[mm]
A
≤ 20 dm²
20 dm² <
A
≤ 40 dm²
40 dm² <
A
≤ 80 dm²
80 dm² <
A
≤ 150 dm²
L
≤ 1.0
unconsidered
unconsidered
unconsidered
unconsidered
1.0 <
L
≤ 2.0
2
1)
6
1)
12
1)
33
2.0 <
L
≤ 4.0
1
1)
2
1)
4
1)
20
4.0 <
L
≤ 8.0
0
0
0
13
8.0 <
L
0
0
0
0
1)
The distance between two adjacent characteristics must be minimum 200 mm.
Table 3.2:
Permissible number of closed bubbles per panel
3.2.2
Solid Inclusions and Stains
Solid inclusions are inhomogeneities within the glass ceramic material. Stains are
deviations of the surface which are easily visible under normal inspection
conditions. Both characteristics cannot be completely avoided due to the
production process. Table 3.3 contains the permissible number of solid inclusions
and stains in dependence of their length and the panel size.
Panel Size
A
Characteristic's
Length
L
[mm]
A
≤ 20 dm²
20 dm² <
A
≤ 40 dm²
40 dm² <
A
≤ 80 dm²
80 dm² <
A
≤ 150 dm²
L
≤ 0.5
unconsidered
unconsidered
unconsidered
unconsidered
0.5 <
L
≤ 2.0
0
3
1)
6
1)
30
2.0 <
L
≤ 4.0
0
0
1
1)
3
4.0 <
L
0
0
0
0
1)
The distance between two adjacent characteristics must be minimum 200 mm.
Table 3.3:
Permissible number of solid inclusions and stains per panel
Summary of Contents for 2B Classic 2020
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