Ababi Sharon on mon 18 dec 00
First, to your attention, This frit from Bath potter's catalog , to let you
know why some people in U.K. did not hear, about G.B.
Soft borax frit bath
====================
Si2O3............... 48.10 48.10%
B2O3................ 31.20 31.20%
Al2O3............... 0.30 0.30%
K2O................. 0.20 0.20%
Na2O................ 15.30 15.30%
CaO................. 4.80 4.80%
MgO................. 0.10 0.10%
========
100.00
also explains how people could make a raku glaze with an add of 15% kaolin
and it melted !
Anther frit, I have it's analysis, I even tried it in those days
that frit was another white material with a name, number, is this:
JOHNSON MATTHEY GLAZE FRIT 3701
Seger Formula
Na2O+K2O+ Li2O ... 1
SiO2............................2.86
B2O3..........................1.99
Analysis
Na2O+K2O+ Li2O ... 16.6
SiO2.............................46
B2O3...........................37.3
Coefficient of expanse 89x10-7
Melting point...........950-1050C
molecular weight ...373
Remarks: An alkaline frit specially developed to cover a large range of
applications. Slightly soluble etc.
I wrote and ask for more detail about the Na2O+K2O+ Li2O , but they did not
answer yet. Perhaps one of you can give more details.
I remember in the shop, they called it "Raku glaze".
There is a new supplier here, an agent of "Hobby Colorobia", I asked him
for details about their frits, He promised to send me the details, but
probably business are good enough and they did not really need more
customers, I also wrote to Hobby Colorobia, that sent me back to the
diligent agent Does anyone knows the names and analysis of their frits?
Ababi Sharon
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/index.html
* * * * * * * *
www.photoisland.com
ID: sharon@shoval.org.il (Not my email anymore!)
Password:clay
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