Paul B on sun 18 dec 05
The following glaze is a very runny and glossy glaze at cone 11. It looks
similar to the glaze bill campbell uses (although i started using it as an
apprentice before i knew who he was) and it is basically a very over fired
glaze. It does tend to blister at times and some of the research i have
done has made me think that it would be more consistent if frits were used.
I have read that whiting and dolomite put out a lot of gasses and i know
gerstley tends to be problematic as well. Can anyone suggest the proper
frit to use if i want to keep the same silica/alumina ratio? I plan to get
Insight soon but at the moment don't have the software to reformulate it.
thanks,
Paul
POTASH FELDSPAR 20.37
WHITING 18.52
DOLOMITE 11.11
FLINT 29.63
GERSTLEY BORATE 9.26
BENTONITE 2.00
KENTUCKY BALL CLAY (OM4) 7.41
Paul Lewing on sun 18 dec 05
on 12/18/05 11:21 AM, Paul B at PAUL@DOCRET.COM wrote:
> POTASH FELDSPAR 20.37
> WHITING 18.52
> DOLOMITE 11.11
> FLINT 29.63
> GERSTLEY BORATE 9.26
> BENTONITE 2.00
> KENTUCKY BALL CLAY (OM4) 7.41
Hi, Paul. Without spending a whole lot of time tweaking this recipe, try:
Custer 27.23
frit 3134 14.55
wollastonite 36.55
talc 10.44
ball clay 8.76
bentonite 2.48
the Si:Al ratio is a little higher (12.18 as opposed to 10.68) but the
chemistry is pretty close, and it's all materials with little or no LOI.
Good luck, Paul
Ron Roy on tue 20 dec 05
Hi Paul,
I was about to reformulate this with 3134 but see the total is only 98.3 -
have I got all the materials? - Also - what spar are you using?
RR
>The following glaze is a very runny and glossy glaze at cone 11. It looks
>similar to the glaze bill campbell uses (although i started using it as an
>apprentice before i knew who he was) and it is basically a very over fired
>glaze. It does tend to blister at times and some of the research i have
>done has made me think that it would be more consistent if frits were used.
>I have read that whiting and dolomite put out a lot of gasses and i know
>gerstley tends to be problematic as well. Can anyone suggest the proper
>frit to use if i want to keep the same silica/alumina ratio? I plan to get
>Insight soon but at the moment don't have the software to reformulate it.
>thanks,
>Paul
>
>
>
>POTASH FELDSPAR 20.37
>WHITING 18.52
>DOLOMITE 11.11
>FLINT 29.63
>GERSTLEY BORATE 9.26
>BENTONITE 2.00
>KENTUCKY BALL CLAY (OM4) 7.41
>
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Paul B on tue 20 dec 05
I am using g200 feldspar and yes, all the materials are there. Not sure why
it does not add up to 100 but that is that way i have always used it.
thanks,
Paul
| |
|
