Glazes - Theory and Chemistry (36)

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Cobalt Oxide versu Cobalt Carbonnate

Does anyone have a calculation for swapping COBALT CARB for Oxide?  I have plenty of Carb and no oxide and poverty prevents me from buying.…

Started by Nadine Mercader

4 Sep 2, 2013
Reply by Norm Stuart

Bentonite Anyone?

It seems that many if not most glaze recipes have an addition of 2% bentonite.  This is usually explained as being added to suspend the gla…

Started by George Lewter

10 Jun 25, 2013
Reply by Angela Davis

Gerstley Borate / Kona F4 Feldspar and substitutions

I just started making my own glazes again this year. Before that, it had been about ten years. At that time, Gerstley Borate and Kona F4 Fe…

Started by Shine Chisholm

5 Dec 28, 2012
Reply by Shine Chisholm

Wollastonite and Whiting

I understand from reading that wollastonite does less LOI than whiting.  What are the reasons for using one over the other besides LOI?

Started by Sharon Canfield

2 Dec 10, 2012
Reply by Sharon Canfield

Spectralux versus Zircopax

It seems my local supplier only sells Spectralux Opacifier which runs about 60% more than straight Zircopax.  It is the same percentage of…

Started by Brent Farler

2 Dec 1, 2012
Reply by Brent Farler

A Question of Kaolins from Mary Jane

At 12:40pm on December 23, 2010, Mary Jane said… Hi George - Another question.  The recipes I got at the Steven Hill workshop just say kao…

Started by George Lewter

3 Dec 28, 2010
Reply by Mary Jane

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