Inspection Item

Test Method

StandardValue

Unit

Detection Data

Light Transmittance

(D65)　(within the spectral range of wave length between 380nm-1100nm)

＞93.5

%

94.11

Pencil Hardness

GB/T 6739

≥4

H

5

Brushing Resistance Test

After 400times of brushing tests, measure the attenuation value of light transmittance

≤1.0

%

0.4

Water Resistance

After 96 hours water resistance test, measure the attenuation value of light transmittance

≤0.5

%

0.1

Acid Resistance Test

Steep the sample in the hydrochloric acid of  1mol/L under the temperature of 23℃±0.2 ℃ for 24 hours, measure the attenuation value of light transmittance.

≤1.0

%

0.3

Salt Spray Test

NaCl solution of 5% ±1%,spray under 35℃ for 96 hours, measure the attenuation value of light transmittance

≤1.0

%

0.15

Temperature Resistance Test

Repeat 200 times (about 1000hours) under the temperature from -40℃ to 85℃±0.2 ℃, measure the attenuation value of light transmittance

≤1.0

%

0.63

Humid Heat Test

Temperature 85±0.2℃,relative humidity 85% ±5%, test time 1000 hours, measure the attenuation value of light transmittance

≤1.0

%

0.52

Wet AND Freeze Test

Relative humidity 85% ±5%,reduce the temperature from 85℃±0.2 ℃ to -40 ℃ for 10 times, measure the attenuation value of light transmittance

≤1.2

%

1.05

Sand and Dust Test

Under 23 ℃, maintain the humidity lower than 30%,adjust wind speed at 8.9    ±1.2m/s, blowing dust concentration 10.6± 7g/m3 for 6 hours; adjust wind speed at 1.5± 1m/s,raise temperature to 60℃ for 16 hours; adjust

wind speed at 8.9± 1.2m/s, blowing dust concentration 10.6 ± 7g/m3 for 6 hours,

then measure the attenuation value of light transmittance

≤1.0

%

0.88

Heat transfer Coefficient

5.8 W/m2K

Expansion Coefficient between 20-300℃　

per℃=9.03×10-6 m/K

Specific heat capacity　

0.2 J/Kg·K

Calculated Thermal Conductivity at 20℃ In

1.0 W/mK

Softening Point　

~720℃

Annealing Point　

~550℃

Stain Point　

~500℃

Moh’s Scale(Scratch hardness)　

4~5

Knoop Hardness Number

(indentation Hardness) indenter load-500 grams

470

Poisson’s Ratio

0.2

Density

2.5 g/cc

(Yong’s) Modulus of Elasticity

73.000N/mm2

Tensile Strength

43 N/mm2

Pressure resistance

700-900N/mm2

Mechanical Strength

90N/Mn2

Iterm

Index

Thickness tolerance　

±0.2mm(3.2mm)

Dimension tolerance　

±1.0mm

Diagonal difference

≤2mm (diagonal size< 1000mm),

≤4mm (diagonal size>1000mm)

Iron content

＜115pm

Overall Bow/warp

＜0.2%

Local warp

＜0.3mm within 300mm

Iterm

Index

Unclear Pattern

Visible

Not Allowed 

Bubble

Micro bubbles

≤3.0/㎡

Length(L) ㎜

2≤L＜5

5≤L＜10

L≥10

Number Allowed

6*S

3*S

0

Inclusion

Length(L)㎜

2≤L<3

L≥3

Number Allowed

4*S

0

Line

Visible

Not Allowed 

Number Allowed

Dents

Visible

Not Allowed 

Number Allowed

Wrinkle

Visible

Not Allowed 

Scratch

Visible

4pcs(L<5mm,W≤1mm),

2pcs(L<5-10mm,W≤1mm),

1pc (L<10-25mm, W≤1mm)

Number Allowed

Crack

Should Not Visible

Edge

Broken Edge, Corner

≤1pc

Nick, Flange

L≤10mm; W≤2mm,thickness≤1mm.

Note:

1,L means length and W means width. S means the area of glass in Meter. Number Allowed is the product of S and its coefficient.

2,Less than 8 bubbles (smaller than 2mm) within one circle with a diameter of 100mm.

3,Devastating inclusion not allowed.