Quality Requirements for Automotive Glass

Items

Quality Requirements

Thickness

Tolerance

Thickness

Nominal

Automotive Tempered

Automotive Laminate

Windshield(TW)

Standard(AT)

Special(SA)

Standard(AL)

Tolerance

Tolerance

2.0

--------

2.00-2.20

2.3

--------

2.20-2.40

2.5

--------

2.40-2.60

3.0

--------

2.90-3.10

3.2

3.10-3.30

3.10-3.30

3.5

3.40-3.60

--------

4.0-6.0

± 0.20

--------

Cross

Bow

2.0-3.0

-------- ≤1mm/m

3.5-6.0

≤1mm/m

--------

Bow&

Dish

2.0-3.0

-------- ≤1mm/m

3.5-6.0

≤1mm/m

--------

Size

Tolerance

Thickness
Nominal

Tolerance

Tolerance

>2000mm

≤2000mm

>2000mm

≤2000mm

2.0-3.0

--------

--------

± 3mm

± 2mm

3.5-6.0

± 3mm

± 2mm

--------

--------

Edge Qlty

Flake

≤4mm

≤4mm

Bevel/Flare

≤3mm

≤3mm

Corner

≤4mm

≤4mm

Over Score & Cutter Drag

None allowed

None allowed

Squareness

Diagonal measurement differece/2 ≤0.2% of the diagonal length

Optical Distortion

Zebra ≥55°

Zebra ≥50°

Surface

Flaws

No apparent flaw visible 1 meter away under normal fluorescent inspection light

No flaw visible at 0.5 meters away

No flaw visible at 1 meter away

Bloom

GRADE ≤1.5

GRADE ≤2.0

Noncontinued

Defects

Size(d)

(mm)

Number of Defects/M 2 Allowed

Windshield(TW)

Standard(AT)

Special(SA)

Standard(AL)

0.3<d ≤0.5

Allowed

Allowed

0.5<d ≤0.8

2

Allowed

1

Allowed

1

2

None

1

0.8<d ≤1.5

Allowed in to 30 mm from the edge

Allowed in to 30 mm from the edge