Cynthia Gehr on tue 6 oct 98
I was wondering, I have mixed several glazes with magnesium (about 10 percent)
and it seem it make the glaze stiffer not as runny. Is it my imagination or
is this really happening? I have researched several glaze material book and
they do not list this as an attribute to magnesium.Thank so much!!! And by
the way, if anyone is reading this who answered my goblets big or small base
question, I really appreciate it !!! Many interesting views out there.
Cyndi Gehr (cyngehr@ufl.edu)
BAK!BAK!goblet lady
Ron Roy on thu 8 oct 98
Hi Cyndi,
I'm looking at two tables - in the Hamer book. The table on viscosty says
MgO is in the neutral area - does little to raise or lower viscosity - the
other table is about surface tension - in that case - alumina gives the
most surface tension and the next oxide is MgO. A glaze with a high surface
tension would tend to not smooth out during the firing as well as a glaze
with a lower surface tension.
>----------------------------Original message----------------------------
>I was wondering, I have mixed several glazes with magnesium (about 10 percent)
>and it seem it make the glaze stiffer not as runny. Is it my imagination or
>is this really happening? I have researched several glaze material book and
>they do not list this as an attribute to magnesium.Thank so much!!! And by
>the way, if anyone is reading this who answered my goblets big or small base
>question, I really appreciate it !!! Many interesting views out there.
>
>Cyndi Gehr (cyngehr@ufl.edu)
>BAK!BAK!goblet lady
Ron Roy
93 Pegasus Trail
Scarborough, Ontario
Canada M1G 3N8
Tel: 416-439-2621
Fax: 416-438-7849
Web page: http://digitalfire.com/education/people/ronroy.htm
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