Items

European standard

Internation standard GB/T4100.1-1999

Product Performance

1

Water absorption (%)

≤0.5

≤0.5

≤0.1

2

Modulus of breakage(Mpa)

≥27

≥35

≥41.5

3

Breakage pressure(N)

for a thickness of≥7.5mm,the mean value is≥1300N

≥2500

4

Side(%)

±0.6

±1.0mm

±0.6mm

5

Thickness (%)

±5

±5

±0.4

6

Surface flatness (%)

±0.5

±0.2

±0.09

7

Straightness of side (%)

±0.5

±0.2

±0.06

8

Rectangularity (%)

±0.6

±0.2

±0.1

9

Abrasion resistance(mm³)

≤205

≤175

≤140

10

Moths hardness

≥6

≥6

11

Resistance to thermal shock

As per contract

No crack after 10cycles under(15-145)

Eligible

12

Frost resistance

No crack after 10cycles under(+5--5)

Eligible

13

Chemical resistance

As per contract

As per contract

UA

14

Acid and alkali solutions

As per contract

As per contract

ULA UHA

15

Resistance to glossiness

≥60

16

Resistance to glaze cracking

As per contract

≥55