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Marilee's Lava - During the firing CO2 is released from the silicon carbide creating the lava effect.
a) experimented with varying amounts of silicon carbide (1, 2, 3.4 and 4.4 g) and from one to three coats applied;
b) with gloop interspersed (4.4 g silicon carbide).

Marilee's Lava
Custer Feldspar
 49.73
 substitute is Potash Feldspar, but out of that so used Thai Potash
Whiting
 23.91
EP Kaolin
 13.18
Silica
 13.18



Titanium Dioxide
 11.29
Silicon Carbide
 3.40


Note (16 June): See also works by Amanda and Sophia.  Sophia had an old batch of Marilee's, quite thick, which produced a fluffy looking result.
Amanda used a recipe by Sue McLeod, which seems whiter. 

Sue's Lava/Crater 3
Custer Feldspar
 39.50
 substitute is Potash Feldspar, but out of that so used Thai Potash
Whiting
 23.00
EP Kaolin
 16.30
Silica
 9.70
Minspar 200
 6.50
  [substitute Nepheline Syenite in slighter lower amount
Ferro Frit 3134
 5.00



Titanium Dioxide
 11.00
Silicon Carbide
 1.80

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