Inspection item

Unit

Standard request

Actual
measurement

Unit item
Access

Edges and
comers flaw

Frontage edges flaw

mm2

<3x6

No

Pass

Frontage corners flaw

mm2

<4x4

No

Pass

Bottom surface edges and corners flaw

mm2

<20x15

No

Pass

Frontage edges and corners flaw

mm2

≤1/4 Lab thickness

No

Pass

Flatness tolerance limit common difference  (Flat length)<400

mm2

≤0.50

0.15

Pass

Angle tolerance limit common difference  (Flat length)<400

mm2

≤0.40

0.20

Pass

Density

g/cm2

≥2.30

2.36

Pass

Water Absorption

%

≤0.20

0.08

Pass

Flexual Srength

Dry

Mpa

≥16

35.6

Pass

Compression strength

Dry

Mpa

≥90

125.2

Pass

Mohs hardness

-

≥3.0

6.5

Pass

Mirror to glossiness

Gs

≥40

60

Pass

Radioactivity

IRa=0.01
Ir=0.16

A kind