NO

Item

Unit

Standard requnement

Result

Assessmen

1.

Dimension deviation

%

Length

±0.50

-0.10~+0.13

Pass

Width

±0.50

-0.05~+0.30

2.

Edge straightness

%

High-class product ±0.20

±0.07

Pass

3.

Squface smoothness

%

High-class product ±0.30

-0.13~+0.10

Pass

4.

Surface quality(high-class)

%

Central flexibility (hight-class)

+0.40

-0.20

±0.14

Pass

Edge flexibility (hight-class)

+0.40

-0.20

±0.17

Angularity(high-class)

±0.30

-0.17~+0.11

5.

Surface quality(high-class)

-----

At least 95% tiles have to surface defect found by straight doservation from a distance of 0.8m

Conform to

Pass

6.

Water absorption

%

Average 10-20

Single ≥ 9

E>10%

Pass

7.

Failing strength

N

When thickness ≥ 7.5mm , average ≥ 600

852.9

Pass

8.

Modulus of rupture

M Pa

Average ≥ 15

Single ≥ 12

21.4

18.2~23.6

Pass

9.

Hear vibration resistance

------

No explosion or crack occours after 10 heat vibration resistance test.

Conform to 

Pass

10.

Crack resistance

No crack or spalling on the glaze surface after crack resistance test.

Conform to

Pass

11.

Pollution resistance

------

No lower than 

Grade 5

Pass

12

Acid resistance

------

Test for grading after being put into 3% GCI for 4d 

GLA grade

------

13

Alkali resistance

------

Test for grading after being put into 30g/LKOH for 4d

GLA grade

------