8.3. Glass blemish
8.3.1. Scratch
Width
Length of single scratch
W< 0.05
No limit
0.05<W<0.10
30
0.10<W<0.15
30
W> 0.15
None allowed
8.3.2. Bubbles/Foreign materials
Bubbles
Average diameter of defects
0.3---0.45
Air blister
(Max. legth 6.0)
(Max. width 0.3)
Foreign material
Apply the face defect standard for blackish defects
Average of diameter
of defects
0.25---0.45
Note: No limit for the defects less than 0.25 mm average diameter
Quantity allowed within any
circle
70
2
2
Quantity allowed within
any circle
70
2
Minimum distance
12.7
12.7
Minimum distance
12.7
445N
35