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Alumina Hydrate
Alumina Hydrate
AT Hymod Ball Clay
AT Hymod Ball Clay
Barium Carbonate
Used in casting slips (up to 5%)to prevent scumming arising from soluble salts. A flux in high temperature glazes. It also produces matt and semi matt surfaces at earthenware temperatures, but an excess will cause a rough, dry glaze surface.
Batt Wash
This product will prevent drops of glaze from sticking to the bottom of the kiln or the kiln shelves. The wash binds with the glaze to make a brittle material that can easily be scraped off. It is recommended that the shelves be coated with a new coat of wash before each firing.
Kiln shelves are quite expensive, so anything you can do to save them is well worth it!
It is made by mixing with...
Bentonite
Extremely plastic colloidal clay used in bodies(up to5%) to increase plasticity and in glaze (up to 2%) as a suspending agent. More than 3% can cause cracking of the unfired glaze layer due to the high drying shrinkage rate.
Bone Ash
A secondary flux in glazes and occasionally used as an opacifier. The essential constituent used to produce translucency in bone china bodies. Typically made from ground, calcined animal bones, bone ash is a source of calcium phosphate.
Analysis
Ca3(PO4) 2
Calcined Alumina
Calcined Alumina
Cellulose Fibre
Cellulose Fibre
China Clay
China Clay (kaolin)
A refractory, low plasticity white firing clay used widely in glazes and bodies as a source of alumina and silica.
When added to glazes it will stiffen and melt effectively increasing the firing range of the glaze.
Al203
SI02
Fe203
K/Na2O
36%
49%
0.83%
2.3%
Ciment Fondue (Grey)
Ideal for both casting and sculpting, Ciment Fondu is widely used by sculptors because it is extremely hard and quick setting and gives superb detail. Using Ciment Fondu and an stone aggregate for a concrete mix has replaced stone for certain types of work. Because it is cheap, hard, tough, and durable, it is particularly suitable for large outdoor projects, especially decorative wall surfaces and...
Coarse Silica Sand
Used as a grog or for ware placing.
Added to a body, they help glaze fit and make the body more refractory.
16-30 Mesh
Colemanite
A naturally occurring source of Boron. A powerful primary or secondary flux in glazes. It intensifies the effect of colouring oxides. It also increases craze resistance in glazes.
B203
CaO
SiO2
43.9%
26%
4.5%
Cornish Stone
Decomposed granite, used as a secondary flux in silica glazes and as an alternative to feldspar due to higher content. Low iron content. Gives good whiteness.
Al203
SI02
K2O
Na2O
15.3%
72.9%
3.8%
4%
Dolomite
Natural source of calcium and magnesium. Useful as a secondary flux in porcelain and stoneware glazes.
CaO3
MgO3
31.4%
20.8%
FFF Feldspar
A medium strength flux sufficing both body and glaze applications.
K20
Na2O
Al2O
SiO2
7.5%
5%
18.5%
67.5%
Fibreglass Chopped Stands 13mm
12mm
Fibreglass Strand also known as Chopped Strand or Choppies, is used to reinforce resin, plaster, cement and Jesmonite casts. Ideal for smaller items where scrim and fibreglass mat is too bulky or awkward to use.
Can be mixed heavily with resin to produce a putty like consistency, which can be applied to awkward areas more easily.
Fine Silica Sand
Used as a grog or for ware placing.
Added to a body, they help glaze fit and make the body more refractory.
60's Mesh
Firebrick Grog 0-5mm - 25kg
Firebrick Grog 0-5mm -25kg
Flint
Very refractory material used to provide silica in bodies and glazes. Increases firing temperature and craze resistance but reduces plasticity and shrinkage.
Analysis
SiO2
Gillespie Borate
Gillespie Borate
Also know as Gerstleys Borate
Raku, Earthenware, Stoneware and Porcelain -- Excellent over a wide temperature range from below cone 06 to cone 10
Special Effects -- Excellent glaze texture and activity for specialty glazes.
Colored Glazes -- GB works well with most pigments and has an exceptionally wide color palette.
Grog 80-Dust
Gives finer clays a useful bite.
Manufactured using calcined china clay which is a refractory white grog. Fine grades are used to reduce shrinkage of engobes and to increase resistance to thermal shock. Coarser grades are used in clay bodies such as Earthstone
Grade 80's - Dust
Grog Hi-Pur 5'S-Dust
Gives finer clays a useful bite.
Manufactured using calcined china clay which is a refractory white grog. Fine grades are used to reduce shrinkage of engobes and to increase resistance to thermal shock. Coarser grades are used in clay bodies such as Earthstone.
Grolleg China Clay
A refractory, medium plasticity white-firing clay used mainly in white earthenware, bone china and porcelain clay bodies.
A blended English china clay, combining moderate plasticity, low titania content and relatively high flux content, low shrinkage and blue-white fired color. The low Tio2 content is a key factor for the usefulness of Grolleg. It is excellent for making translucent throwing or...
HVAR Ball Clay
Low plasticity white-firing ball clay.
Whiter firing than TWVA (34061).
Popular in many stoneware bodies.
Hyplas 71 Ball Clay
High plasticity cream firing ball clay for pottery clay bodies.
Recommended for earthenware or stoneware body formulations.
Fires ivory buff colour.
Al203
SI02
Fe203
K/Na2O
20%
70%
0.8%
2.3%
Lead Bisilicate
LEAD BISILICATE
Lead Bisilicate fritting involves the melting together of glaze materials (some of which are soluble in water or stomach acids) to produce a combination which is insoluble (or relatively so).
Lead bisilicate is the frit generally used in low solubility glazes and standard borax frit for leadless glazes.
Low Sol.
Firing range 880°C -1050°C
% ANALYSIS
PbO = 65.04
Al2O3...
Lead Sesquisilicate
Supplied in powder form
Often chosen for artisitic glazes where food safety is not required, this low solubility frit has a ratio of 1 part lead to 1.5 parts silica.
Firing Range 860°C-1040°C
LEAD SESQUISILICATE % ANALYSIS
PbO = 68.52
TiO2 = 3.07
SiO2 = 28.41
Frit Comparision Guide
Molochite 30-80
Molochite grog graded as 30s to 80s
White firing inert filler added to clay to increase strength andshape stability.
Molochite 85-Dust
Molochite grog graded as 85s - Dust
White firing inert filler added to clay to increase strength andshape stability.
Nepheline Syenite
A stronger flux than feldspar for uses both in glazes and bodies reducing maturing range.
Analysis
9.1% K2O 7% Na2O 24.9% Al2O3 56% SiO2
Petalite
A secondary flux in high temperature bodies and glazes. It may also be used to alter colour response and to reduce thermal expansion.
Porcelain China Clay
Porcelain China Clay (Kaolin) Powder
3416-04 Porcelain China Clay Powder
Standard Porcelain China Clay.
Greater plasticity than other china clays, this is designed for use in white porelain bodies.
Potash Feldspar
Norwegian sourced. Used as a flux in bodies and as a major constituent in glazes. It melts at approximately 1200c.
Also known as Custer Feldspar
K20
Na2O
Al2O
SiO2
11.3%
3.2%
18.5%
65.8%
Powdered Fireclay
A good all round fireclay in granular form giving excellent stoneware properties. This product is in a raw, as dug state which is dried and pulverised. It may still contain some oversized particles.
Typical analysis for Fireclay 203 (granular):
SiO2 - 54.00
TiO2 - 1.28
Al2O3 - 28.20
Fe2O3 - 2.09
CaO - 0.36
MgO - 0.93
NA2O - 0.17
K2O - 2.76
LOI (Loss On Ignition) - 9.34
Quartz
Find ground silica sand for use in bodies and glazes.
Analysis
SiO2
Soda Ash
Sodium Carbonate. Used in the preparation of casting slips in combination with Sodium Silicate. Also a source of sodium in alkaline glazes.
Soda Feldspar
Norwegian sourced. The strongest flux , more suitable for low temperature glazes and bodies.
K20
Na2O
Al2O
SiO2
2.8%
8.5%
18.5%
69.5%
Spodumene
A very active flux used in small amounts in glazes. Also added to bodies where its low expansion properties help thermal shock resistance.
Analysis
7.6% LiO2 26% Al2O3 64.5% SiO2
Talc
Used in a body flux in conjunction with feldspar to reduce thermal expansion and increase thermal shock resistance. It can also be use as a secondary flux in glazes giving an opaque semi-matt / vellum finish.
Analysis
32.4% MgO 46.3% SiO2 9.5% Al2O3
TWVA (AK) Ball Clay
A blend of medium plasticity ball clays similar in properties to ESVA. White-firing but slightly lower plasticity than ESVA.
NOTE TWVA Ball Clay is the replacement for ESVA which has been phased out by the producers. Fires to a similar colour and has good plasticity.
TWVD Blu Ball Clay
TWVD Blu Ball Clay
This is a non carbonaceous clay with excellent workability. It has a thrixotropic nature and if used with other clays it will control the thrixotropy of casting slips. It is also ideal for tableware and calcareous earthenware. It can be also used as a glaze suspending agent.
Whiting
Principal source of lime in glazes. Under reducing conditions it assists in celadon colour development. Assists hardness and durability and in large quantities produces mattness.
Analysis
CaCO3
Wollastonite
Primarily used as a secondary flux. An alternative source of calcium and used in both earthenware and stoneware glazes.