 |
Alberta Slip in the common 11% lithium and 4% tin Albany slip cone 6 glaze.
|
 |
Classic dolomite glaze at cone 10 reduction on a speckle producing clay body (10R). The magnesia flux in dolomite creates a silky matte surface.
|
 |
This is what about 8% iron can do in a transparent base glaze with slow cooling at cone 10R on a refined porcelain.
|
 |
Two runs of Alberta slip plus 20% frit 3134 in a flow test comparison at cone 6.
|
|
Alberta Slip in the common 11% lithium and 4% tin Albany slip cone 6 glaze.
|
 |
Orthoclase Feldspar Rock
|
 |
The variegating effect of a thin layer of titanium dioxide (outside of bowl) on GA6-D Alberta Slip glaze at cone 6
|
 |
GA6-C Alberta Slip glaze with 4, 5 and 6% rutile. Clearly 6% is too much.
|
 |
Example of variegation and phase separation with about 5% rutile added to a dolomite matte cone 10R glaze.
|
 |
2,3,4,5% rutile added to a 80:20 mix of Alberta Slip and Frit 3134 at cone 6
|
 |
Cone 6 GA6-C variegated blue showing different thicknesses (4% rutile+ 20% frit 3134 in Alberta Slip)
|
 |
Fluid rutile glaze
|
 |
Since iron oxide is a flux in reduction, overglaze iron based pigments run if applied to thickly
|
 |
Crystallization of rutile is completely subdued using Ferro frit 3249 (20% with Alberta Slip) on the right (the left is frit 3134 20%)
|
|
GA6-C Alberta Slip glaze with 4, 5 and 6% rutile. Clearly 6% is too much.
|
 |
An oxidiation transparent glaze with iron added produces an amber
|
 |
95% Alberta Slip plus 4% iron at cone 10R
|
 |
Orthoclase In Granodiorite
|
 |
Orthoclase Crystals
|
 |
Quartz Pink
|
 |
Quartz Clear
|
 |
Quartz Clear Crystals
|
 |
Quartz Blue
|
 |
Quartz Green Prasiolite
|
 |
Quartz Blue 2
|
 |
Quartz Black
|
 |
Quartz Stalactite
|
 |
Quartz Rock Rose
|
 |
Quartz Egg
|
 |
Quartz Sphalerite
|
 |
Petalite Stone
|
 |
Petalite Rock
|
 |
Petalite
|
 |
Quartz Rose Crystals
|
 |
Llanite Basalt
|
 |
Lithium Crystal
|
 |
Lazulite Siderite Quartz
|
 |
Laboradite Feldspar
|
|
2,3,4,5% rutile added to a 80:20 mix of Alberta Slip and Frit 3134 at cone 6
|
 |
Muscovite Mica
|
 |
Muscovite Star Mica
|
 |
Emeralds Mix
|
 |
Beryl Feldspar Mica
|
 |
Mica Star
|
 |
Copper
|
 |
TGA-DTA Sample curve for Copper Carbonate
|
 |
A comparative flow test of Custer, G-200, high soda and high potassium feldspars.
|
images/materials/newman.jpg picture not found |
Corundum On Feldspar
|
|
Quartz Clear Crystals
|
 |
Two glazes, same chemistry, different materials. Left has 34% Wollastonite, in other whiting sources same amount of CaO. See INSIGHT manual under: Mineralogy vs. Chemistry
|
 |
This Nepheline Syenite flow test did not demonstrate much of a difference in melting at cone 9 between 270 and 400 mesh materials?
|
 |
Copper In Calcite
|
 |
Copper Phosphate2
|
 |
Zeolite
|
 |
Zeolite Stellerite Crystals
|
 |
Alberta Slip used as a straight glaze at cone 10R, it looks much like a Tenmoku.
|
 |
Chemistry of Mysorine
|
 |
Malachite diagram
|
 |
TGA/DTA curve showing weight loss over temperature range
|
 |
Natural Red Iron Oxide powder
|
 |
10% lithium and 4% tin do this to an otherwise transparent dull brown Alberta Slip.
|
 |
Red iron oxide in a high temperature reduction fired glaze
|
 |
A buff stoneware vase with 100%
Ravenscrag Slip glaze on Laguna B-Mix clay
|
 |
Rutilite Slices
|
 |
Rutile Crystals
|
 |
Rutilated Quartz2
|
 |
Rutilated Quartz
|
 |
Quartz Rutilated
|
 |
Phonolite Rutile
|
 |
Sodalite Quartz Pebbles
|
|
Rutilated Quartz2
|
|
Rutilated Quartz
|
 |
Quartzite W Gold
|
 |
Quartz Smoky
|
|
Quartz Rutilated
|
 |
Spodumene Rock
|
 |
Spodumene Kunsite
|
 |
Soapstone Steatite Carving
|
 |
Serpentine Soapstone
|
 |
Quartz Rose
|
 |
Feldspar W Hornblende
|
 |
Feldspar Sphere
|
 |
Calcite W Apatite
|
 |
Apatite Crystals
|
 |
Apatite In Calcite
|
 |
Fluorite Apatite
|
 |
Fluorapatite On Apatite
|
 |
Andalusite Cross In Rock
|
|
Laboradite Feldspar
|
 |
Labradorite Gem Feldspar
|
 |
Basalt
|
 |
Peridot In Basalt
|
|
Llanite Basalt
|
|
Corundum On Feldspar
|
 |
Chrysocolla-veined Feldspar
|
|
Beryl Feldspar Mica
|
 |
Augite Feldspar
|
 |
Aquamarine On Feldspar
|
 |
Tourmaline On Feldspar
|
|
Orthoclase Feldspar Rock
|
 |
Labradorite Feldspar
|
 |
Aquamarine Muscovite Albite
|
 |
Almand Cleveland Muscov-ite
|
|
Muscovite Star Mica
|
 |
Muscovite Stone
|
 |
Muscovite Stone2
|
|
Muscovite Mica
|
|
Fluorite Apatite
|
 |
Flint Stones
|
 |
Diorite Trachyte
|
 |
Dioptase Crystals
|
 |
Crocoite Red
|
 |
Eulandite
|
 |
Fluorite Calcium Sphere
|
 |
A cone 10 reduction stoneware clay containing iron stone concretions ground to 20 mesh
|
 |
Crocoite Red 2
|
 |
Bismuth Crystals
|
|
A comparative flow test of Custer, G-200, high soda and high potassium feldspars.
|
 |
Cone 10R beanpot glazed with Alberta Slip (100%).
|
 |
Floating blue at cone 6 using boraq gerstley borate substitute.
|
 |
1215U flow test, MgO is sourced from Talc (right) and from a much more actively melting MgO frit (left).
|
|
This Nepheline Syenite flow test did not demonstrate much of a difference in melting at cone 9 between 270 and 400 mesh materials?
|
 |
Custer feldspar vs. G200 feldspar
|
 |
Flow tester used to compare feldspars
|
|
A comparative flow test of Custer, G-200, high soda and high potassium feldspars.
|
 |
The top bar is a mix of calcium carbonate and clay fired to cone 6. The bottom is a couple of minutes after water was poured onto it.
|
 |
Celadon cone 10R glaze (about 3.5% iron oxide) with G1947U transparent liner glaze
|
 |
A cone 10 reduction tenmoku glaze with about 10% iron oxide.
|
 |
Cone 10 reduction fired crystallizing kaki glaze (about 12% iron oxide).
|
 |
An illmenite colored glaze (GR6-H) at cone 6 oxidation
|
 |
Cone 10R dolomite matte glaze with 5% manganese dioxide
|
 |
Example of 0.2% 60-80 mesh manganese granular in a cone 6 stoneware body.
|
images/materials/zotwomyhon.jpg picture not found |
Examples of various sized grogs from CE Minerals, Christy Minerals, Plainsman Clays
|
 |
Examples of some different silica sands
|
 |
A grolleg porcelain (on the left) compared to a standard 4x25 porcelain (cone 10R).
|
 |
Lincoln 60 fired drying disk (cone 10R), this sample is vitrified
|
 |
GR6-A Ravenscrag clear on M340
|
 |
Example of the oversize particles from a 325 mesh screen (left) and 200 mesh (right) fired to cone 8. This bentonite (Volclay 325) has 2% residue on 325 and 1% on 200.
|
|
Example of the oversize particles from a 325 mesh screen (left) and 200 mesh (right) fired to cone 8. This bentonite (Volclay 325) has 2% residue on 325 and 1% on 200.
|
 |
Example of various materials mixed 75:25 with volclay 325 bentonite and fired to cone 9. Plasticities and dry shrinakge vary widely. Materials normally acting as fluxes are refractory.
|
 |
Example of calcium carbonate (top) and dolomite (both mixed with 25% bentonite). They are fired to cone 9. Both bars are porous and refractory, even powdery.
|
|
Example of calcium carbonate (top) and dolomite (both mixed with 25% bentonite). They are fired to cone 9. Both bars are porous and refractory, even powdery.
|
|
Examples of various sized grogs from CE Minerals, Christy Minerals, Plainsman Clays
|
 |
A comparison of the plasticity of Volclay 325 Bentonite:Silica 25:75 (top) and Hectalite:Silica 50:50 (a refined version). Both are mixed with The latter is much less plastic even though it is double the percentage in the recipe.
|
|
A comparison of the plasticity of Volclay 325 Bentonite:Silica 25:75 (top) and Hectalite:Silica 50:50 (a refined version). Both are mixed with The latter is much less plastic even though it is double the percentage in the recipe.
|
 |
Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
|
|
Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
|
|
Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
|
 |
Copper can produce bright red glazes in correct reduction firing
|
 |
copper oxide in a transparent oxidation glaze
|
 |
Copper red reduction glaze cone 9 courtesy of Angela Walford
|
 |
Copper oxide (2%) added to an otherwise stable cone 6 glaze fluxes it considerably
|
|
Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
|
|
Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
|
|
Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
|
|
Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
|
|
Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
|
|
Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
|
 |
The fluxing power of boron (in borax): The two top clay bars contain 15% hydrous borax. At cone 06 it has melted and drained out of the bars, running down over the others as a glass.
|
|
The fluxing power of boron (in borax): The two top clay bars contain 15% hydrous borax. At cone 06 it has melted and drained out of the bars, running down over the others as a glass.
|
 |
Lithium, albany glaze at cone 5 using original albany slip
|
 |
Flow tester comparing the melt fluidity of Albany Slip vs. Alberta Slip at cone 10R
|
 |
Albany Slip DFAC dried disk showing the soluble salts and characteristic cracking pattern and cut edge of a low plasticity clay.
|
 |
Cone 11 flow test of original cornwall stone, H&G substitute 2011 and L3617 calculated equivalent
|
 |
This 1000 ml 24 hour sedimentation test compares Plainsman A2 ball clay ground to 10 mesh (left) with one that same material ball milled (right). There is no sediment in the milled material.
|
 |
Plainsman A2 ball clay DFAC drying disk test showing the incredible dry shrinkage of a typical ball clay and the stress it can put the clay under during drying.
|
 |
Large particle kaolin (left) and small-particle ball clay (right) DFAC drying disks demonstrate the dramatic difference in drying shrinkage and performance between these two extremes.
|
|
Large particle kaolin (left) and small-particle ball clay (right) DFAC drying disks demonstrate the dramatic difference in drying shrinkage and performance between these two extremes.
|
 |
Example of a calculated Cornwall stone substitute blend (left) vs. Cornwall stone itself. The two are mixed with 20% Ferro Frit 3134 and fired at cone 5.
|
 |
Cone 10R firing of Plainsman FireRed (left), St. Rose Red 42 mesh (center) and St. Rose Red 10 mesh (right). The 10 mesh material produces a reduction speckle and deep red color that is very unique.
|
|
Cone 10R firing of Plainsman FireRed (left), St. Rose Red 42 mesh (center) and St. Rose Red 10 mesh (right). The 10 mesh material produces a reduction speckle and deep red color that is very unique.
|
 |
Plainsman P580 (35:17:1.5 ball clay:kaolin:bentonite), H570 (10:46:2.5), P700 (50:5 Grolleg:bentonite) and Crysanthos Porcelain (China) fired in oxidation at cone 10.
|
|
Plainsman P580 (35:17:1.5 ball clay:kaolin:bentonite), H570 (10:46:2.5), P700 (50:5 Grolleg:bentonite) and Crysanthos Porcelain (China) fired in oxidation at cone 10.
|
|
