Alisa Clausen on wed 4 jun 08
Recipe Name: Oil Spot Daly
Cone: 6 Color:
Firing: Oxidation Surface: Oil Spot
Amount Ingredient
35 Feldspar--Custer
26 Silica
9 Whiting
9 Talc
9 Kaolin--EPK
15 Frit--Ferro 3195
103 Total
Additives
9 Iron Oxide--Red
2 Cobalt Carbonate
Unity Oxide
.12 Na2O
.139 K2O
.251 MgO
.49 CaO
1.000 Total
.405 Al2O3
.186 B2O3
.004 Fe2O3
4.063 SiO2
.001 TiO2
0 P2O5
10 Ratio
6.5 Exp
Comments: A blue ground with a brown shell, showing tea dust like spots
scattered overall.
Glaze test for Oil Spot, Daly ^6 ox.
Source: John Britt
Fired on mid fire white stoneware
Firing ramp with an electric controller is:
100c p/h to 600c (212f - 1112f)
150c p/h to 1140c (302f - 2084f)
80c p/h to 1220c (176f - 2228f)
15 min. soak
cool down max. to 900c (1652f)
Hold 30 minutes
Shut off kiln
Colorants or additives to a 100 gram batch are measured in percent to the
100 gram batch.
Standard Substitutions in all tests IF called for in recipe:
Local Boron Frit is used for Frit 3134
Forshammer (a half and half Potash and Soda spar) is the only Feldspar used
Local Boron Frit is used for Gerstley Borate
All substitutions are done not by Mol. Wts., but gram for gram.
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