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cone 10 oxidation glaze tests

updated sat 21 oct 00

 

Cindy Strnad on fri 20 oct 00


Woodbourne Base 92
Zakin ^9
#1

Custer Spar 44
Redart 20
Ball Clay 8
Dolomite 28

Si:Al 6.07
SiB:Al 6.07
Expansion 7.71

Applied to ^10 oxidation/reduction stoneware body--white to blond color =
in oxidation. Fired to ^10 in 9.09 hours (medium speed), cooled =
naturally with all vents closed. ***This applies to all the glazes***

Pretty amber-colored glossy glaze which shows immediate crazing. Bison =
good.

Pilgrim Vitreous Engobe 92 ^9
Zakin
#2

Custer Spar 12
Talc 20
Ball Clay 52
Gerstley 2
Whiting 2
Zircopax 12

Si:Al 4.81
SiB:Al 4.86
Expansion 5.01

Slightly dry to slightly satin white surface. Some crawling where thick, =
slightly foamy appearance where thick. Bison poor.

Deerpark Base ^9
Zakin
#3

Silica 10
Spodumene 8
Ball Clay 30
Redart 18
Dolomite 34

Si:Al 5.01
SiB:Al 5.01
Expansion 6.18

Amber, mix of glossy surface and frosty matte with flow-stone like =
downward movement of color. Bison good. NVF.

Shan 92 ^9
Zakin
#4

Spodumene 10
Ball Clay 18
Redart 36
Dolomite 24
Gerstley 12

Si:Al 4.88
SiB:Al 5.25
Expansion 6.72

Red-brown which shades to a pleasing greenish shade at the base, where =
thick. Some dripping, not much. Didn't reach the shelf (I had a one inch =
thickness of unglazed area at the base, though, so treat this one with =
care.)

Satin to glossy surface with beautiful movement of color. Many pinholes. =
Bison fair.

Harpersfield R 92 ^9
Zakin
#5

Spodumene 10
Ball Clay 16
Red Iron Oxide 8
Redart 44
Dolomite 30

Si:Al 5.07
SiB:Al 5.07
Expansion 7.05

Dark red brown, frosty satin with an almost micaceous shine in the =
sunlight. Slight downward movement of black color, some slight dripping =
where thick. This is a gorgeous glaze. Bison fair.
NVF

Cindy Strnad
Earthen Vessels Pottery
RR 1, Box 51
Custer, SD 57730
USA
earthenv@gwtc.net
http://www.earthenvesselssd.com