clay bodies

CLAY BODIES:

White stoneware:
Before firing:
color	grey
shrinkage	none
warp age	hardly
plasticity	Good to work with and good for throwing
After firing:
color	White
Shirinkage	Hardly
Warpage	None
Maturing temperature	1280
porosity	0.5%
comments	Not suitable for wood firing, since it cracks. It is also not a good body for large pieces since they also crack.

Pure porcelain
Before firing:
color	White
shrinkage	None
warp age	hardly
plasticity	Difficult for throwing
After firing:
color	White
Shirinkage	Hardly
Warpage	None
Maturing temperature	higher
porosity	-
comments	Needs to reach 1300 for more for desired result

Semi porcelain
Before firing:
color	grey
shrinkage	None
warp age	hardly
plasticity	Fairly plastic
After firing:
color	White
Shirinkage	Hardly
Warpage	None
Maturing temperature	higher
porosity	-
comments	Needs to reach 1300 for more for desired result and has given a slight blue haze in wood firing

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glaze tests

GLAZES:

some glaze recipies required the use of bone ash which is not availible here so fired and made bone ash myself.

The result of the firing is pure white bones, which i then curshed into a very fine powder in a blender. after adding it to the glaze, i milled the glaze for atleast 3-4hours.

Glaze Recipe	Success	Results / comments
TOMATO RED: · Sodium feldspar · Silica · Whiting · China clay · Magnesium carbonate · Bone ash · + red iron oxide	yes	Does not achieve a red but it gives a good melt at cone 9 with a green

Glaze recipe	Success	Results / comments
MASHIKO: · Sodium feldspar · Silica · Ball clay · Wallastonite · Talc · Bone ash · + red iron oxide · + manganese dioxide · + tin oxide	yes	Gives a good melt and a good brown where applied thin.

Glaze recipe	success	Results / comments
OILSPOT: · Sodium feldspar · Silica · China clay · Talc · + red iron oxide · +cobalt	yes	Gives a blue where applied thin on higher temperature, however, it also achieves a bottle green under same tests.

Glaze recipe	success	Results / comments
CLEAN CRACKLE: · Sodium feldspar · Whiting · China clay	yes	Good melt and light crackles at 1280

Glaze recipe	success	Results / comments
RAANIA'S GLAZE 9 · Sodium feldspar · China clay · Wood ash – washed and sieved	no	Gave uncertain effects in all firings

Glaze recipe	success	Results / comments
CLEAR CRACKLE(308): · Potassium feldspar · Whiting · China · Flint	no

Glaze recipe	success	Results/comments
COOL CELADON(316): · Potassium feldspar · Whiting · Ball clay · Flint · +red iron oxide	No	Higher melting point than cone 9

Glaze recipe	success	Results/comments
DAVID LEACH PORCELAIN GLAZE: · Potassium feldspar · China clay · Flint · Whiting	no	Did not melt in any glaze testing firings.

Glaze recipe	success	Results/ comments
RAANIA RED: · Red clay · Wood ash	no	Did not melt

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