Faux galena glaze

[Des & Jan Howard]

Does anyone have a Cone 10 reduction glaze that would
resemble a medieval dusted galena glaze?
Des
--
Des & Jan Howard
Lue Pottery
Lue NSW
Australia
2850

02 6373 6419
www.luepottery.hwy.com.au
-32.656072 149.840624

[Lee]

I have an 03 amber clear. Gary Holt's revised Amber is amber on
white clay. This isn't published but he gave me the revised version
after I inquired about the published glaze:

custer feldspar 52.3
Whiting 18.5
Silica 16.9
EPK 10.0
Tin Ox. .6
Rutile 1.7

--
Lee Love in Minneapolis
http://mingeisota.blogspot.com/
"The intuitive mind is a sacred gift and the rational mind is a
faithful servant. We have created a society that honors the servant
and has forgotten the gift." -- Albert Einstein

[Des & Jan Howard]

Lee
Thanks for the reply.
That amber glaze is good for Cone 10 reduction?
Des

Lee wrote:
> I have an 03 amber clear. Gary Holt's revised Amber is amber on
> white clay. This isn't published but he gave me the revised version
> after I inquired about the published glaze:

[Lee]

On Tue, Nov 24, 2009 at 9:37 PM, Des & Jan Howard <djho...@hwy.com.au> wrote:
> Lee
> Thanks for the reply.
> That amber glaze is good for Cone 10 reduction?
> Des

Yes, but it is only amber on a white clay. Will be more caramel on an
iron clay. But that is how the old lead glazes went and so were
nicely adapted to slip decoration.

Jean found another nice old McCoy caramel colored mug at Saver's
thrift store. She also found a "New Deal" mug, which was produced
during Roosevelt's re-election campaign. She paid 99 cents, but
might be worth a little bit more.

[Neon-Cat]

Des, an amber cone 10 reduction glaze will look like the dusted faux galena you want? If so, I'll post one.

Marian

[Des & Jan Howard]

Marian
Yes please.
I have to make 500 "medieval" cups for
an evening of jousting, carousing,
assorted merriment & forkless munchings.
Des

Neon-Cat wrote:
> Des, an amber cone 10 reduction glaze will look like
> the dusted faux galena you want? If so, I'll post one.

[Lee]

On Tue, Nov 24, 2009 at 11:10 PM, Des & Jan Howard <djho...@hwy.com.au> wrote:
> Marian
> Yes please.
> I have to make 500 "medieval" cups for
> an evening of jousting, carousing,
> assorted merriment & forkless munchings.

Cool! I am trying to reseach old Irish pottery. Maybe do the Irish
festival in St. Paul. Gotta find a kilt.

[Neon-Cat]

Here are three, Des, to try.

1. Original from Ron Philbeck of Shelby
Amber Glaze, cone 10 reduction

Alberta Slip 33
Wollastonite 13
Silica 14
Gerstley Borate 3
Whiting 7
Custer feldspar 20
Yellow ochre 7

2. Modified Amber, cone 10 reduction

Albany Slip substitute 33
(see below)
Wollastonite 13
Silica 14
Gerstley borate 3
Whiting 7
Custer 20
Yellow ochre 7
Alum. hydroxide 3

Albany Slip substitute:
Red Art 7314
Neph Sy 501
EPK 359
Dolomite 686
Whiting 606
Flint 534

3. Amber Celadon, cone 10 reduction
from Tom Gray, Seagrove

Albany Slip 36
Wollastonite 14
EPK 3
Gerstley 3
Whiting 8
G-200 22
Yellow ochre 7

At a community college the modified version, recipe 2 I made up went through 2-five gallon buckets real quick because it was deemed so nice by students -- they left me just enough out of the second bucket with which to glaze a small piece and try it myself. It did look nice on all kinds of student work with varied stoneware and porcelain bodies. Without the 3% alum. hydroxide it ran -- badly. Nice clear amber, glossy, breaks and flows nicely over ridges, no crazing in sight.

I tested all three glazes, too, with a comparable sub of yellow iron oxide -- streaky and matt and mottled colors (brown, green, yellow). Not good as ambers, but kind of interesting versions on their own.

Sound like a fun event (after you make the 500 cups).
Drink one for me:>)

M.

[Des & Jan Howard]

Marian & Lee
Thanks for the glazes. I'll probably make
a litre or so of each one, do a kiln load
& see which one/s works best under my
clay/kiln conditions.
Des

Neon-Cat wrote:
> Sound like a fun event (after you make the 500 cups).
> Drink one for me:>)

I'll do that, with much pleasure.

[Neon-Cat]

Des, I was thinking about the ambers after posting last night (I left school studios here not long after that experience) -- I never did run calculations on the glaze I tinkered with to see if it was within standard limits. As I recall I was more intrigued with the streaky matt opaques that resulted from the yellow iron oxide substitutions for yellow ochre that gave 'clear' and glossy ambers. That's still an interesting question -- at the time there were too many variables, from application of glazes to source materials to firing conditions, so I stalled thinking about that...

[Des & Jan Howard]

Marian
Thanks for the concern re standard limits.
As the glazes posted will have to be made using my
own available materials things will change anyway.
Also I never fuss about standard limits. My shinos,
for example, aren't even in the same house,
let alone the same room as "standards" allow.
Des

Neon-Cat wrote:
> I never did run calculations on the glaze I tinkered
> with to see if it was within standard limits.
> As I recall I was more intrigued with the streaky matt
> opaques that resulted from the yellow iron oxide substitutions
> for yellow ochre that gave 'clear' and glossy ambers.
> That's still an interesting question -- at the time there
> were too many variables, from application of glazes to
> source materials to firing conditions,
> so I stalled thinking about that...

[Neon-Cat]

Nice to know, Des.
I must have forgotten I'm OK over here on claycraft with non-standards.

Marian


--- On Wed, 11/25/09, Des & Jan Howard <djho...@hwy.com.au> wrote: