Test 1 Results

All tests fired to cone 10 with medium reduction at ^012 and a slow cooling. Natural gas downdraft kiln with 20cu ft stacking space. Sprague emerald green is on porcelain and the rest are on stoneware. 

Sprageue Emerald Green

Feldspar            50
EPK                   20
Whiting              30
-add-
Copper carb       4

Malcolm Davis Shino

Nepheline Syenite       40.91 %
Soda Ash                    17.27
Soda Spar (kona,f4)     9.82
EPK          18.18
Om Ball Clay      13.82

Iron Saturate

Custer 41
EPK 8
Whiting 21
Silica 30
-add-
RIO 15

Black pearl

Whiting - 15.39
custer 32.69
ball clay 19.23
silica 32.69
-add-
cobalt 2.8 (original is 4.81)
RIO 9.62

Mottled blue

Feldspar 36.14
Whiting 15
Gerstly 10.55
Silica 19.65
EPK 7.20
Bentonite 3
-add-
Cobalt carb 4

Sprague red

EPK 9.75
custer 69.00
Gerstly 24.75
silica 30.00
Whiting 19.50
Tin ox 4.50
-add-
iron ox .75
cobalt carb .35

HT 51 Clear

Custer 26.50
EPK 19.50
Whiting 19.50
Silica 34.00