Test No.

Recipe

%

Added Colorant

Test 17

Frit (WZBF)

20%

8 g

P4129.5

Flint

50%

Borax

30%

Test 18

Frit (WZBF)

10%

8 g

P4108.5

Silica

50%

Talc

40%

Test 19

Frit (WZBF)

20%

8 g

P4187.5

Potash Feldspar

50%

Bone Ash

30%