Steve Slatin on fri 14 nov 08
Elizabeth --
It's hard to convert and ^10 recipes to
^6 without altering results. I suspect
that you are just starting out on the
glaze experiment path, and want to
begin with something that'll let you
work from a reliable starting point.
Altering a recipe by 4 cones isn't a
good place to start, unfortunately.
It may be wiser, and ultimately involve
less effort, to begin with a ^6 glaze of
known characteristics that are similar
to the characteristics of the recipe you
want to start with.
I see it has quite a bit of magnesium in it.
I've never used the Potters Palette as a
source, but I believe it uses a few different
bases and lots of colorant variations, right?
If so, a known good ^6 high-magnesium glaze
would be the place to start.
Paul Lewing has a high-magnesium base glaze
that takes colorants very well; I've only
done limited experiments with it, but others
have used it often. It's certainly worth
a try --
Recipe Name: Lewing's Magnesium Base
Cone: 6 Color:
Firing: Surface:
Amount Ingredient
22.4 Talc
28 Nepheline Syenite
9.4 Kaolin--EPK
7.5 Silica
32.7 Frit--Ferro 3134
100 Total
Alisa Clausen has developed a 'Buttery Base'
glaze, and test tiles are published on
http://www.flickr.com/photos/glazes/sets/72157605159449998/
Some of the results look absolutely
excellent. You can take a look at them
and see if it does what you want. The recipe is
59.2 Nepheline Syenite
6.6 Talc
7.9 Dolomite
26.3 Ball Clay--Kentucky Stone
100 Total
And let's not forget Don Goodrich's Magnesium Matte --
it has some zinc in it, which can alter color response
quite significantly, but it's a very good glaze.
Recipe Name: Goodrich's Magnesium Glaze
Cone: 6 Color: Clear
Firing: Oxidation Surface: Buttery
Amount Ingredient
50 Nepheline Syenite
37 Talc
4 Whiting
4 Zinc Oxide
5 Kaolin--EPK
5 Gerstley Borate--1999
105 Total
Everyone who does this starts somewhere --
this is as good a place as any to start.
Good luck -- Steve Slatin
--- On Fri, 11/14/08, Elizabeth Jacobs wrote:
> From: Elizabeth Jacobs
> Subject: Potters Palette Recipe C modification
> To: CLAYART@LSV.CERAMICS.ORG
> Date: Friday, November 14, 2008, 11:08 AM
> Could one of the glaze experts suggest how this cone 10 base
> glaze
> "recipe c" from The Potters Palette book could be
> modified for cone six?
> Here is the recipe:
> Potash Feldspar 50
> Dolomite 20
> China clay 20
> Bone ash 10
>
> Thanks,
> Elizabeth
>
> www.elizabethjacobs.com
>
> www.unitywall.org A Community Collaborative Public Art
> Project
Elizabeth Jacobs on fri 14 nov 08
Could one of the glaze experts suggest how this cone 10 base glaze
"recipe c" from The Potters Palette book could be modified for cone six?
Here is the recipe:
Potash Feldspar 50
Dolomite 20
China clay 20
Bone ash 10
Thanks,
Elizabeth
www.elizabethjacobs.com
www.unitywall.org A Community Collaborative Public Art Project
Ron Roy on sun 23 nov 08
Hi Elizabeth,
Keep in mind - this is not a stable glaze - silica is way low - and it's a
clay matte - and probably crazing.
Try this at cone 6 - if you want to have a matte glaze it is probably
necessary to slow cool - it is still not a stable glaze and it will
probably still craze so best not to use it as a liner glaze.
Let me know if you need more info - If this does not turn out the way you
like it let me know and I can suggest some variations. Just remember - I
don't keep copies of these so send back both recipes and a good description
plus cone bend and firing cycle if you want to try some more.
RR
-----------------
NEPH SY............. 22.00
F3278............... 20.00
DOLOMITE............ 21.00
TALC................ 3.00
EPK................. 22.00
BONE ASH............ 12.00
----------
100.00
>Could one of the glaze experts suggest how this cone 10 base glaze
>"recipe c" from The Potters Palette book could be modified for cone six?
>Here is the recipe:
> Potash Feldspar 50
> Dolomite 20
> China clay 20
> Bone ash 10
>
> Thanks,
> Elizabeth
Ron Roy
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
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