Clay bodies left to right: stoneware 55, speckled brownstone, Ellen buff, porcelain
Glazes front to back:
folk art guild white, Zam celadon, C Harris Tenmoku, strontium crystal magic cool, strontium crystal magic warm, SH red orange

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Comment by Daniel Ramos speak-spanish. on May 18, 2015 at 5:51pm

Gracias Norm, meteré unas pastillas de prueba  

Comment by Norm Stuart on May 18, 2015 at 4:59am

According to the chemistry, spodumene has only 20% of the ceramic-flux, lithium oxide, contained in lithium carbonate. The extra material is the equivalent of kaolin and silica, so these two ingredients in the recipe should be reduced to keep the chemistry identical.

But in this recipe "Weathered Bronze Green" the glaze I made using spodumene looks only slightly different than a glaze made with the same weight of lithium carbonate or lithium fluoride.

Chemistry of / Componentes químicos de:

Spodumene

Lithium Carbonate

Kaolin / Caolin

Según a la química, spodumene tiene sólo el 20% de la flujo-cerámica, óxido de litio, contenido en carbonato de litio. El material extra es el equivalente de caolín (kaolin) y sílice (silica), por lo que estos dos ingredientes de la receta se debe reducir para mantener la química idénticaEl carbonato de litio es refinado del mineral spodumene.

Pero, en esta receta "Degradado de Bronce Verde" "Weathered Bronze Green" el esmalte yo hecho usando spodumene ve sólo ligeramente diferente de un esmalte hecho con el mismo peso de carbonato de litio, o fluoruro de litio.

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Lithium Carbonate, Spodumene, and Lithium Fluoride

Comment by Daniel Ramos speak-spanish. on May 17, 2015 at 9:59pm

Como se sustituye el carbonato de lithio por spedumene , es decir tengo spodumene , pero no tengo carbonato de litio , en mexico no venden litio pero si tengo spodumene ?

Comment by Cyndy Littleton on January 29, 2015 at 5:09pm

I will definitely look into those options! Thank you Juli!

Comment by juli long on January 29, 2015 at 4:30pm

I guess we could replace the barium with strontium carbonate or whiting on a  molar weight in glaze cal. and reformulate.  I'm not savvy with it though.

Comment by Cyndy Littleton on January 29, 2015 at 12:51pm

The folk art guild got a lot of ooooooohhs from my clients. I like the way it breaks. I love the looks of the Buckwheat, but the barium content is a concern. If it was my studio, I would make a batch in a heartbeat.

Comment by juli long on January 29, 2015 at 12:45pm

Good to see you got some tested.  i plan to do some when it warms up here. The folk art guild looks pretty promising to me (had that one in mind).

juli

Comment by Cyndy Littleton on January 28, 2015 at 9:30pm
Testing glazes from John Britt's new book

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