Clays
Clay & Minerals Cedar Heights Fireclay 50 mesh FULL BAG
50# bag; white bag, green text Cedar Heights Fireclay Cedar Heights Fireclay is generally used in recipes for stoneware clays. Fireclay is a type of refractory clay. Because of its high firing temperature, fireclay is typically used to make firebricks, kiln furniture, and is used in some sculpture and pottery clays. using a fireclay in a clay recipe will create plasticity and allow the clay to go to a higher temperature. Information gathered from Digitalfire Ceramic Materials Database and The Potter's Dictionary of Materials and Techniques by Frank Hamer.
$22.00
Clay & Minerals EPK Kaolin
10.27.23 - Please note: we had heard reports of recent loads of EPK showing black specks in the firing. We tested the batch we received last month and found no black specks or any other contaminants. E.P.K. stands for Edgar Plastic Kaolin, and is a kaolin mined in Edgar, Florida. This material fires white and is loved for its stickiness when wet and thixotropic properties. 15-20% will make a glaze slurry gel and allow bisque ware to be dipped in the glaze. While this material is good for casting, it does not have enough plasticity to be good for throwing clay bodies on its own. In that case, more plastic kaolins or a plasticizer can be added to the body. Information gathered from Digitalfire Ceramic Materials Database. 50# bag; brown bag, black text EPK Pulverized Kaolin
$2.50 - $22.50
Clay & Minerals Foundry Hill Creme
Foundry Hull Creme is a fairly refractory stoneware that is very similar to ball clay but has a much lower drying shrinkage and much higher firing shrinkage. It is most commonly used in stoneware clay bodies. 50# bag; brown bag, red text HC Spinks and Foundry Hill Creme on top and bottom
$2.50 - $17.00
Clay & Minerals Goldart (FULL BAG only)
Goldart is a plastic stoneware clay that comes from Cedar Heights Clay Company in Oak Hill, Ohio. It is very popular and used in many clay body recipes. It has a wide firing range, vitrifying at cone 10 reduction. 50# bag; yellow bag, red text Cedar Heights Air Floated Clay Information gathered from Digitalfire Ceramic Materials Database.
$21.50
Clay & Minerals Grolleg (English) Kaolin
Grolleg is a blended English kaolin typically used for making translucent porcelain clay bodies. The material has a low shrinkage rate and fires to a blue/white color. It has moderate plasticity and a low titania and high flux content. A glaze or clay body will almost always specify Grolleg if Grolleg is necessary. If it just says china clay or kaolin, other kaolins are a more cost-effective option. Information gathered from Digitalfire Ceramic Materials Database. 55# bag; white bag, blue text Imerys Quality China Clay
$4.00 - $70.00
Clay & Minerals Helmer Kaolin FULL BAG
Helmer Kaolin is mined in Helmer, Idaho from a kaolin deposit found there. The most common use for this kaolin is for wood firing because of its amazing flashing properties. Information gathered from Digitalfire Ceramic Materials Database. 50# bag; brown bag, no text
$50.00
Clay & Minerals KT 1-4 Ball Clay
KT 1-4 Ball clay is a coarse and fast casting ball clay. It is a specific blend of SGP1 and OM4. This ball clay is most used in artware, low fire, brightly colored pieces. Information gathered from Digitalfire Ceramic Materials Database 50# bag; brown bag, black text KT #1-4 printed on side
$2.50 - $19.00
Clay & Minerals OM-4 Ball Clay
OM-4 Ball Clay, which stands for Old Mine #4 located in Mayfield, KY, is a very popular, fine ball clay. It has amazing plasticity and strength and is used in many clay bodies as well as glaze recipes. In glazes, it helps with suspension aid of the slurry. Information gathered from Digitalfire Ceramic Materials Database. 50# bag; brown bag, red text OM4 printed on side
$2.50 - $18.60
Clay & Minerals Ranger Red FULL BAG
Ranger Red is an earthenware clay mined in Texas. It has a high iron content and can be used as a substitute for Redart. This material is gray in raw form and fires to a dark red. 50# bag; brown bag, Ranger Red printed on front
$40.00
Clay & Minerals Redart
Redart is an earthenware material that fires red and is fired to low temperatures (cone 06-3). It has low plasticity and low shrinkage. In clay bodies, it needs bentonite added to impart more plasticity. This material makes a good casting slip but may also need the addition of bentonite to help it pull away from the walls of the mold without tearing. Information gathered from Digitalfire Ceramic Materials Database. 50# bag; red bag, yellow text Redart with green tree
$2.50 - $21.50
Clay & Minerals Roseville FULL BAG (50#)
Roseville is a stoneware clay material that has been used for over 100 years. It fires in cone 1-8 and comes out as a warm buff color. Roseville is used in many clay and casting bodies by itself or in conjunction with other materials. Information gathered from Digitalfire Ceramic Materials Database. 50# bag; white bag, red text Roseville
$26.00
Clay & Minerals XX Sagger (FULL 50# BAG only)
XX Sagger is a ball clay that fires to an off white with 13% shrinkage at cone 10. XX Sagger is useful in salt firing as well as making flashing slips for atmospheric firings. Information gathered from Digitalfire Ceramic Materials Database. 50# bag; brown bag, XX Sagger printed on side
$20.00
Clay & Minerals Hawthorn Fireclay - 35 mesh FULL BAG
Hawthorn Fireclay is a refractory, buff colored fireclay. It is a very popular material that is used in many clay recipes. Hawthorne has an incredibly high plasticity and a high temperature, vitrifying around cone 8-10 (with the small addition of a feldspar) and shrinking about 12% at cone 10. Information gathered from Digitalfire Ceramic Materials Database. 50# bag; brown bag, blue text Minerals and 35 Mesh Bond
$14.00
Laguna OptiKast
OptiKast is a coarse grained kaolin. It's primary use is in casting slips because of it's fast casting and deflocculation properties, which also make it useful in pressure casting systems. Optikast is the recommended substitute for Velvacast kaolin. Information gathered from Digitalfire Ceramic Materials Database.
$48.10
Clay & Minerals SGP #1 Ball Clay
SGP #1, also known as Tennessee Ball Clay #1, is a coarse grained ball clay with medium plasticity and strength. It is an industry standard for casting due to its fast casting properties and can be used as a suspender in glaze slurries. 50# bag; brown bag, TN #1 SGP printed on side
$2.50 - $21.00
Laguna Newman Red FULL BAG
Newman Red is a red burning fireclay. It has low plasticity and low dry strength and is loved for its very strong staining abilities. Information gathered from Digitalfire Ceramic Materials Database.
$51.40
Hammill & Gillespie New Zealand Kaolin FULL BAG
New Zealand Kaolin is considered to be the whitest kaolin sold globally. In porcealin bodies, it fires whiter and more translucent than bodies made with grolleg. However, it is a less plastic material and makes a less vitreous clay body than grolleg. In glazes, New Zealand Kaolin will suspend and dry harden slurries. It produces very clear glazes because of chemical composition. This material is very sticky in clay bodies and glazes. In glazes, it is important to sieve the slurry made with NZK to properly disperse the clumps of material that will be made. Information gathered from Digitalfire Ceramic Materials Database.
$75.00
Hammill & Gillespie G200-EU Feldspar (potash)
G-200 Feldspar is a high quality potassium / sodium / calcium aluminum silicate ground to 200 mesh for ceramic applications. Carefully beneficiated and controlled for quality, G-200 offers high potash content and low iron oxide per unit of alumina.
$2.50 - $55.00
