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 Ferro Frit 3134?
Calcium Borate source used with other frits at cone 06 to 01. Raw materials are weighed, melted together and ground to produce a powdered glass. Frits are storehouses of oxides which are both stable and predictable.
What can I use instead of Ferro frit 3134?
Frit 3134 is low-alumina/high-boron, 3124 is medium-alumina/low-boron and 3195 is medium-alumina/high-boron. Boron is the melter. Alumina thickens the melt and hardens the glass. Just from this it appears that Frit 3195 is a better starting point for calculations to replace frit 3134.
Is Frit 3134 a flux?
-It has high boron. That gives it a lot of bang-for-buck as a flux, especially in middle temperature. -It has a very high CaO content. That makes it useful for developing chrome-tin pinks and maroons.
What does frit 3134 do in a glaze?
The high expansion of this frit is quite useful since it can be used in a frit blend to create low-temperature glazes with adjustable thermal expansion. The high boron means it can tolerate a very high alumina content from other materials, especially clay.
What is EPK in glazes?
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 a substitute for Gerstley borate?
Description : Gillespie Borate™ is a blended borate mineral for use in glaze formulas replacing Gerstley Borate on a pound for pound basis.
Is borax and borax frit the same thing?
Boron frits may have 1% boron or 50% boron. Even though the boron in the frit is no longer in the borax form it is still customary to refer to such as “borax frits”. Since many textbooks call for a generic borax frit in certain glaze recipes it can be very difficult to determine what frit to use.
Is EPK china clay?
EPK, China Clay – Mid-South Ceramics.
Is kaolin and EPK the same?
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 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.
What is borax frit used for?
Borax Frits Borax frits are often used in the production of earthenware glazes when a lead free glaze is required. Slight milkiness, especially at lower temperatures, may be evident over red clays, and the colour response with oxides, etc. is not usually so vivid as with lead frits.
What does borax do in glaze?
Borax is a powerful melter in glazes, used in low-fire glazes and as an auxiliary melter in some stoneware glazes. It increases the fluidity of the glaze and helps to heal defects. Amounts up to about 10% may be added to viscous glazes, including high-fire glazes for this purpose.
Is EPK kaolin the same as China clay?
Description. Kaolin – Also called China Clay (Al2O32SiO2H2O) (m.p. 3150o F/1760o C) A secondary water washed kaolin mined in Florida. It is fairly plastic and very white firing compared with most other American kaolins. It has excellent casting properties.
Is EPK and kaolin the same?
EPK, which is how most people refer to the material Edgar Plastic Kaolin, is a secondary water-washed kaolin that is mined in Florida. Its popularity is due to its plasticity and white-firing properties, especially when compared to other American-sourced kaolins. It has excellent casting properties.
Where does Gerstley borate come from?
What is Gerstley borate used for?
Gerstley Borate is a sodium-calcium-borate compound used in ceramics as a low and mid-range temperature flux. It is essentially a source of boron in glazes, and acts as a melting agent. It also can act somewhat as an opacifier and prevent crazing.
Is borax the same as borax frit?