Alisa Clausen on wed 2 may 07
Glaze test for WoDo 40/10 adjusted Neph. Sye and added Talc.
Source:
Credited to:
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.
Substitutions in this test: Frit 3134 subbed with local Boron Frit,
Feldspar used is Forshammer, Boron Frit is subbed for Gerstley Borate. All
substitutions are done not by Mol. Wts., but gram for gram.
Amount Ingredient
40 Nepheline Syenite
10 Talc
6 Wollastonite
25 Dolomite
20 Ball Clay--Old Mine #4
101 Total
Unity Oxide
.13 Na2O
.044 K2O
.415 MgO
.411 CaO
1.000 Total
.297 Al2O3
.005 Fe2O3
1.467 SiO2
.006 TiO2
4.9 Ratio
7.9 Exp
Results
Similar to WoDo White, this glaze is mat, covering surface and smooth.
With the extra Talc, the glaze is a little more of a silk mat with a toast
color mottling throughout the surface.
Best regards from Alisa in Denmark
| |
|
