Alisa Clausen on wed 4 jun 08
Recipe Name: Oil Spot #1 (Under glaze for #2)
Cone: 6 Color:
Firing: Oxidation Surface: Oil Spot
Amount Ingredient
48 Feldspar--G-200
24 Silica
17 Whiting
11 Kaolin--EPK
10 Iron Oxide--Red
110 Total
Unity Oxide
.092 Na2O
.216 K2O
.005 MgO
.686 CaO
1.000 Total
.502 Al2O3
.25 Fe2O3
4.011 SiO2
.002 TiO2
0 P2O5
8 Ratio
7.9 Exp
Comments: gloss, rust brown, some micro spots, Worked well under Oil
Spot Combo #2 glaze.
Glaze test for Glaze test for Oil Spot #1 (Under glaze for #2) ^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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