IMCO Borate is a blended product that is a direct substitute for Gerstley Borate. They say it "has the same physical properties as Gerstley Borate.

What can you use instead of Gerstley borate?

 Oxide Match -- Virtually identical to Gerstley Borate, this product requires no adjustment to formula and no extra additives are needed.  Mineral Match -- Gillespie Borate™ provides the same minerals to the glaze as Gerstley Borate, thus imparting the same glaze activity, texture and effects.

Is Gerstley borate the same as borax?

Gerstley borate is named after James Gerstley, former managing director of Borax Consolidated Ltd. It is manufactured by U.S. Borax and Chemical Corp.; the mine is located near Death Valley, CA. G.B. is an inexpensive source of B2O3 and CaO in glazes. It is often used in place of colemanite.

Is colemanite the same as Gerstley borate?

GERSTLEY BORATE (real) A sodium-calcium-borate compound used as a low and mid-range glaze flux. This is a conglomerate mineral made up primarily of Colemanite, Ulexite and Hectorite. Gerstley is a natural borate similar to but not interchangeable with Colemanite on a 1 to 1 basis.

What can I use instead of calcium borate frit?

American substitute: Gerstley Borate.

Substituting Gerstley Borate in Floating Blue

What can I use instead of frit 3195?

Frit 3195 supplies SiO2, Al2O3, B2O3, CaO, and Na2O. suspend. Fusion at 1800F. Similar frits: Pemco P-67, Glostex GF-115, Fusion F-2.

What is calcium borate frit?

FERRO FRIT 3134 (BORON)

Calcium Borate source used with other frits for low fire glazes. 06 to 01. Frits are glaze materials which have been melted, cooled and ground into a powder which is then added to a glaze formula for the purpose of rendering insoluble, any soluble material present.

Is Gerstley borate still mined?

It is a conglomerate mineral made up mainly of Colemanite, Ulexite and Hectorite. Gerstley borate is the substitute for Colemanite which has been gone for many years. US Borax Corp, the only source of Gerstley Borate in the world closed the mine in southern California in 2000.

Is Gerstley borate a clay?

Thus it is common to find Gerstley-Borate-based recipes having no clay content. GB natural source of boron that was mined in southern California for many years. Mineralogically it is a combination of colemanite, ulexite and high plasticity clay (likely hectorite).

How do you make calcium borate?

It can be prepared by reacting calcium metal with boric acid. The resulting precipitate is calcium borate. A hydrated form occurs naturally as the minerals colemanite, nobleite and priceite. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

What does Zircopax do in a glaze?

Zircopax affects glaze melt viscosity, surface smoothness, thermal expansion and color development and can be implicated in a range of glazes faults associated with these.

What is Custer Feldspar?

Custer Feldspar (NaKO. Al2O3. 6SiO2 ) is a one of the primary feldspars used in ceramics. It is used in both clay (up to 25%) and glaze (up to 100%) formulas and is made up of silica and alumina combined with sodium and potassium oxides. Feldspar custer is mined in Custer, South Dakota.

What is Ferro frit?

Frits are glaze materials which have been melted, cooled, and ground into a powder which is then added to a glaze formula for the purpose of rendering insoluble any soluble materials. The use of frits also allows for the incorporation of certain raw materials in the creation of glazes.

What is Gillespie borate?

Gillespie Borate™ is a blended borate mineral for use in glaze formulas replacing Gerstley Borate on a pound for pound basis. Gillespie borate was developed through a careful formulation process that has resulted in a virtual chemical match to Gerstely borate. Gillespie Borate is a mixture of ulexite (Na2O. 2CaO.

What is EPK kaolin?

EPK (Kaolin)

Edgar Plastic Kaolin - is one of the most popular kaolins used in glazes for its suspening capability, EPK is a water washed kaolin mined in Edgar Florida. It is fairly plastic and very white firing compared with most other American kaolins.

What is whiting in ceramic glaze?

Whiting- Calcium Carbonate – CaCO₃ (m.p. 4650^o F/2570^o C) is a finely ground powder composed essentially of pure Calcium Carbonate derived from Limestone, Chalk, or Marble. It is the most common source of Calcium in a glaze and clay body.

Where is Ulexite found?

It is found principally in California and Nevada, US; Tarapacá Region in Chile, and Kazakhstan. Ulexite is also found in a vein-like bedding habit composed of closely packed fibrous crystals. Ulexite is also known as TV rock due to its unusual optical characteristics.

Is Minspar a soda feldspar?

FELDSPAR MINSPAR 200 (Soda) is a soda feldspar used in glazes and clay bodies if a soda flux is wanted. 2010 - now the substitute for Kona F-4, which is no longer being mined.

What is the difference between frit 3124 and 3134?

Fortunately, these frits are similar. Except for one thing: Frit 3134 has almost no Al2O3 (3124 has lots) and significantly less SiO2. That is a game changer, making it melt dramatically more and lower. Not surprisingly then, her glaze melted way too much, running off the ware.

What is the formula of Colemanite?

Colemanite | B4CaO7 - PubChem.

What is calcium borate used for?

Description. A white powder that is obtained from the mineral Colemanite. Calcium borate is used as a flux for ceramic glazes, Glass, and metallurgy.

How is boric acid prepared from calcium borate?

Boric acid is prepared commercially from Colemanite(Ca₂B₆O₁₁. 5H₂O) by suspending it in boiling water and correspondingly passing SO₂. Ca₂B₆O₁₁ + 9H₂O + 2SO₂ ----->2 CaSO_​​3 + 6H₃BO₃.

Which of the following is the formula of the compound calcium borate?

Calcium borate | B2Ca3O6 - PubChem.

What is fritted glaze?

Frits are glaze materials which have been melted, cooled and ground into a powder which is then added to a glaze formula for the purpose of rendering insoluble any soluble material present.