Alex on mon 13 may 02
As shown this RCP will require Cone 10+ to be mature. You will
need a source of B2O3 to get a similar RCP to melt at C6. can you say
which one you have?
til later. Peace. Tom B.
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The Colemanite analysis I got from my supplier =
Molecular Weight: 170.72
CaO: 35.3
B2O3: 42.9
Fire Loss: 23.1
no more precision about units, flint, alumina content etc.
must not be % as total>100 ? I am a bit confused, but it might be
familiar to you (?). I only understand that bore is a strong flux
and that I therefor not need it at 1260'c (or i missed something
and that is very possible! :-)
As an element of comparison the Potash Felspar analysis I have is
Molec. weight:556.49
SiO2: 66.3
Al2O3: 18.5
Fe2O3: 0.1
CaO: 0.5
Na2O: 2.9
K2O: 11.5
Fluor: 0.008
Fire Loss: 0.3
I would prefer to fire at cone7 Seger (1260'c about) if possible...
about cone 7-8 Orton )
Has anyone an idea how the Recipe C would not run (AND keep its
pointed texture)??
Good day everyone :-)
Alex
Brussels
PS
To Russel
The black stomack glaze is actually better... on foto than in real!
The stomach is (too) big. Flat it's OK+.
I added to Recipe C 2.5% cobalt carb, 2.5% red iron oxid,
0.5% nickel ox, 0.5% manganese ox, and a touch of chrom oxid 0.1% about.
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