Lesley Alexander on sun 8 jul 01
Bob - I believe a lady named Van der (Hoi?) gave that recipe along with
some great ash glazes in a free supplement to Ceramics Monthly, the
first of the year several years ago. Perhaps the first Pottery Making
Illustrateds. I loved it for it's buttery creamy look and used it for
awhile as my main liner glaze, but discovered that for me it crackled
too much. Lesley
Hannah on mon 9 jul 01
For those interested in a recipe for ^9-10 Buttermilk glaze, I found =
one back in the '70's in Ceramics Monthly and have used it =
occassionally ever since. I like it best in reduction on an =
iron-specking clay, but it is a nice waxy white in oxidation.
BUTTERMILK ^9-10 reduction
Custer Feldspar 29.3 (We used to use the old Kingman =
feldspar)
Flint 24.1
Talc 13.5
Colemanite 10.5 (We substituted Gerstley Borate and =
now?? I still have some)
Whiting 9.0
EPK 6.8
100.0
Zircopax 8% (Use any zirconium opacifer)
I'll be interested to hear how it works for other people.
Good luck and best wishes,
Hannah at Lake Tahoe
=20
Ron Roy on thu 12 jul 01
Hi Hanna,
I was just going to do a sub for the GB and find it only totals 93.2 - is
there really 6.8 of something missing?
This looks like an easy fix but I need to know if I have a full deck.
RR
>For those interested in a recipe for ^9-10 Buttermilk glaze, I found one
>back in the '70's in Ceramics Monthly and have used it occassionally ever
>since. I like it best in reduction on an iron-specking clay, but it is
>a nice waxy white in oxidation.
>
>
>BUTTERMILK ^9-10 reduction
>
>Custer Feldspar 29.3 (We used to use the old Kingman feldspar)
>Flint 24.1
>Talc 13.5
>Colemanite 10.5 (We substituted Gerstley Borate and
>now?? I still have some)
>Whiting 9.0
>EPK 6.8
> 100.0
>
>Zircopax 8% (Use any zirconium opacifer)
>
>I'll be interested to hear how it works for other people.
>
>Good luck and best wishes,
>Hannah at Lake Tahoe
Ron Roy
RR# 4
15084 Little Lake Rd..
Brighton,
Ontario, Canada
KOK 1H0
Residence 613-475-9544
Studio 613-475-3715
Fax 613-475-3513
DEBBYGrant@AOL.COM on thu 12 jul 01
Ron,
What's missing from Hannah's recipe is 6.8 Dolomite. I have been using
this recipe for years and, incidently, I stocked up on the Gerstley Borate
enough so that it should last me till I die. This is a very handsome glaze
in ^9 oxidation and takes colored oxides very well. I especially like the
light green it produces with 3% copper carb.
Debby Grant in NH
Dennis Davis on thu 12 jul 01
Ron Roy wrote:
> I was just going to do a sub for the GB and find it only totals 93.2 -
> is there really 6.8 of something missing?
Ron,
Looks like 6.8 Dolomite is the missing ingredient. I occasionally use a
reduction, Cone 9/10 glaze called Buttermilk #2. It is from the Dec '76
issue of Ceramics Monthly.
10.5 Colemanite (I used Gerstley Borate)
6.8 Dolomite
9.0 Whiting
29.3 Custer Feldspar
6.8 Georgia Kaolin
13.5 Talc
24.1 ` Flint
100.0% TOTAL
ADD: 8% Zircopax
Dennis in Warrenton, VA
Bob Hanlin on fri 13 jul 01
To all who responded to my request for a glaze called "Buttermilk": THANK
YOU!!! I've received off CLAYART and here the recipie for that glaze. I
mixed up a test batch (for me that means 2000gm) and have done one firing.
The glaze is a very nice satin matt and is just what the doctor ordered. I
first fired just one plate and will extend my tests in subsequent firings.
The most amazing thing about the responses is that with only one or two
exceptions the recipies were identical. This seems to have been a staple
with many potters over the years and apparently was great with the first
distribution cause few have altered it.
Again thanks!
Bob Hanlin
bobhanlin@earthlink.net
Ron Roy on sat 14 jul 01
OK so I added the missing dolomite at 6.8 and subbed in Frit3134 - I'll be
amazed if this is not the same glaze.
I don't think it is going to prove durable by the way - it's short of
alumina and borderline in silica. Adding 3% copper to this one is not a
good idea. I don't recommend it as a liner glaze.
It will probably look the same with g200 subbed for Custer but will still
not be durable.
Custer - 25.0
Talc - 16.0
Frit 3134 - 13.5
Whiting - 8.0
Dolomite - 6.0
EPK - 10.0
Silica - 21.5
Total - 100.0
Yes I would like to know how it compairs with the original - don't mind if
everyone knows either.
RR
>For those interested in a recipe for ^9-10 Buttermilk glaze, I found one
>back in the '70's in Ceramics Monthly and have used it occassionally ever
>since. I like it best in reduction on an iron-specking clay, but it is
>a nice waxy white in oxidation.
>
>
>BUTTERMILK ^9-10 reduction
>
>Custer Feldspar 29.3 (We used to use the old Kingman feldspar)
>Flint 24.1
>Talc 13.5
>Colemanite 10.5 (We substituted Gerstley Borate and
>now?? I still have some)
>Whiting 9.0
>EPK 6.8
> 100.0
>
>Zircopax 8% (Use any zirconium opacifer)
>
>I'll be interested to hear how it works for other people.
>
>Good luck and best wishes,
>Hannah at Lake Tahoe
Ron Roy
RR# 4
15084 Little Lake Rd..
Brighton,
Ontario, Canada
KOK 1H0
Residence 613-475-9544
Studio 613-475-3715
Fax 613-475-3513
John Weber on sun 15 jul 01
Ron, can you let us know which set of limits you use from Insight. I used
the Cone 10, Green and Cooper set, dated 1995.06.01, which show the limit
for Alumina to be .45 to .825 and the limit for Silica to be 3.50 to 6.40.
Of course, for this glaze that would mean the Alumina of .18 and Silica of
2.30 would be too low as you have pointed out. I just wanted to confirm that
the limits you use are the same ones I've mentioned. If not how do they
differ.
> -----Original Message-----
> From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
> Behalf Of Ron Roy
> Sent: Saturday, July 14, 2001 8:35 PM
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Re: Buttermilk
>
>
> OK so I added the missing dolomite at 6.8 and subbed in Frit3134 - I'll be
> amazed if this is not the same glaze.
>
> I don't think it is going to prove durable by the way - it's short of
> alumina and borderline in silica. Adding 3% copper to this one is not a
> good idea. I don't recommend it as a liner glaze.
>
> It will probably look the same with g200 subbed for Custer but will still
> not be durable.
>
> Custer - 25.0
> Talc - 16.0
> Frit 3134 - 13.5
> Whiting - 8.0
> Dolomite - 6.0
> EPK - 10.0
> Silica - 21.5
> Total - 100.0
>
> Yes I would like to know how it compairs with the original - don't mind if
> everyone knows either.
>
> RR
>
>
> >For those interested in a recipe for ^9-10 Buttermilk glaze, I
> found one
> >back in the '70's in Ceramics Monthly and have used it
> occassionally ever
> >since. I like it best in reduction on an iron-specking clay,
> but it is
> >a nice waxy white in oxidation.
> >
> >
> >BUTTERMILK ^9-10 reduction
> >
> >Custer Feldspar 29.3 (We used to use the old Kingman
> feldspar)
> >Flint 24.1
> >Talc 13.5
> >Colemanite 10.5 (We substituted Gerstley Borate and
> >now?? I still have some)
> >Whiting 9.0
> >EPK 6.8
> > 100.0
> >
> >Zircopax 8% (Use any zirconium opacifer)
> >
> >I'll be interested to hear how it works for other people.
> >
> >Good luck and best wishes,
> >Hannah at Lake Tahoe
>
> Ron Roy
> RR# 4
> 15084 Little Lake Rd..
> Brighton,
> Ontario, Canada
> KOK 1H0
> Residence 613-475-9544
> Studio 613-475-3715
> Fax 613-475-3513
>
> __________________________________________________________________
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>
Ron Roy on wed 18 jul 01
Hi John,
I'm going on the work that John Hesselberth has been doing now - more than
the limits.
Even at cone 6 this glaze is short.
Remember - the Cooper and Green limits are for glazes with boron by the way
- different kettle of fish.
I would stick with the Orton limits published in Insight for non boron
glazes. Even then they are not right for durability - better than nothing
though.
RR
>Ron, can you let us know which set of limits you use from Insight. I used
>the Cone 10, Green and Cooper set, dated 1995.06.01, which show the limit
>for Alumina to be .45 to .825 and the limit for Silica to be 3.50 to 6.40.
>Of course, for this glaze that would mean the Alumina of .18 and Silica of
>2.30 would be too low as you have pointed out. I just wanted to confirm that
>the limits you use are the same ones I've mentioned. If not how do they
>differ.
Ron Roy
RR# 4
15084 Little Lake Rd..
Brighton,
Ontario, Canada
KOK 1H0
Residence 613-475-9544
Studio 613-475-3715
Fax 613-475-3513
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