Parameter/Sample

1

2

3

4

5

6

WAC (%)

-

6.25

6.30

8.14

8.20

5.35

LS (%)

-

1.70

1.40

1.25

1.25

1.60

LOI (%)

-

5.5

6.1

5.0

4.8

5.3

Colour

Unfired

-

Light brown

Grey

Light brown

Light brown

Dark grey

Fired

-

Dark brown

Brown

Dark brown

Dark brown

Dark brown