Table 4: Glass Quality - Maximum Allowable Imperfections per m²
Type 1
Blemish size and positioning
<0.5mm; at least 250mm
apart
0.5mm –1.0mm; at least
350mm apart
1.0mm – 2.0mm; at least
500mm apart
Blemish size and limit of frequency per m², rounded up to nearest m² – i.e. 1.51m² taken as 2.0m², 1.50m² taken as 1.0m²
Type 2
Type 3
Type 4
Annealed
Toughened
Laminated
Annealed
Laminated
Toughened
Centre
Mid
Margin
Nil
2 pcs
2 pcs
Nil
2 pcs
2 pcs
Nil
2 pcs
3 pcs
Nil
2 pcs
3 pcs
Centre
Mid
Margin
Nil
Nil
1 pcs
Nil
1 pcs
1 pcs
Nil
2 pcs
2 pcs
Nil
2 pcs
2 pcs
Centre
Mid
Margin
Nil
1 pcs
2 pcs
Nil
1 pcs
2 pcs
Nil
2 pcs
2 pcs
Type 5
Type 7
Type 8
Patterned Glass
Annealed or
Toughened
Printed Toughened
Monolithic
Printed Toughened
Laminated
Nil
3 pcs
3 pcs
Nil
3 pcs
3 pcs
Nil
2 pcs
3 pcs
Nil
3 pcs
3 pcs
Nil
2 pcs
2 pcs
Nil
2 pcs
3 pcs
Nil
3 pcs
3 pcs
Nil
2 pcs
2 pcs
Nil
2 pcs
2 pcs
Nil
3 pcs
4 pcs
Nil
2 pcs
2 pcs
Type 6
Multi Lam
Annealed &
Toughened
Nil
3 pcs
3 pcs
Nil
2 pcs
3 pcs
Bubble Lines: Quantities listed below are for flat glass. For curved glass, double the acceptable quantity below with maximum acceptable length 80mm. Bubbles hidden behind printed
borders are acceptable, unless specifically stated and agreed by both parties prior to commencement of manufacture.
5mm –15mm long; at least 500mm apart;
<6.0mm in from edge
N/A
N/A
1
1
2
N/A
N/A
2
15mm –35mm long; at least 750mm
apart; <12.0mm in from edge
N/A
N/A
NIL
1
1
N/A
N/A
1
35mm –50mm long; at least 900mm
apart; 12.0 - 15.0mm max in from edge
N/A
N/A
NIL
NIL
NIL
N/A
N/A
NIL
Scratches, scars and rubs
Stretch marks – curved glass only
Refer Clause 9.2.2
Stretch marks on curved glass is an inherent property of the product. Stretch marks are to be inspected under clause 9.2.2 but at 4.0metres,
regardless of quality standard in clause 10.
Ream and other linear distortion – curved
glass excluded
NIL
Edge Quality
Shells/flange at least 500mm apart
≤ 25% glass thickness
Broken corners and corners on/off
≤ 25% glass thickness; Max 1 per pce
Vented edges flat glass
Vented edges curved glass
NIL
NIL
≤ glass thickness,
1pce
Shark’s teeth
Less than 100% of glass thickness with no venting
Slippage between laminated layers
(on any edge)
1.0mm per
meter length
Surfce Vent
Surface blisters/ coating defections
(not clustered)
Process surface imperfections
NOTES:
≤ glass thickness, ≤ glass thickness, ≤ glass thickness, ≤ glass thickness, ≤ glass thickness,
1pce
2 pce
1pce
1pce
1pce
NIL
1.0mm per
meter length;
per layer
1.0mm per
meter length
1.0mm per
meter length
NIL
≥15mm: NIL
6<15mm: 1
3<6mm: 2
≥15mm: NIL
6<15mm: 2
3<6mm: 3
≥15mm: NIL
6<15mm: 1
3<6mm: 2
≥15mm: NIL
6<15mm: 2
3<6mm: 3
Printing and paint imperfections
shall be inspected under clause
9.5.2
Refer Clause 9.2.4
1. Heat-strengthened and toughened glass may be subjected to spontaneous fracture due to the presence of inclusions such as nickel sulphide,
silicones, and the like even when such inclusions are smaller than those allowed in the table above. Glasshape is able to apply proprietary testing
methods to minimize the presence of such inclusions
2. Linear interpolation as defined in AS 1288 shall apply for non-standard thicknesses