Stephani Stephenson on tue 8 jun 99
I am working on a project with a local tile artist., We need to produce
a couple of hundred, persian motif, relief tiles that look like
bronze.The entire tile will be 'bronze', not just painted highlights.
Usually we press with a cone 04-02 terra cotta body..for this we could
change the firing temp or even the body in order to get a reliable
bronze.
There's a process out there whereby a metallic coating is be applied to
bisque(not sure if its electroplating or another process) but the
outsourcing costs on this are pretty high, around $7 tile. Also,
commercial 'bronze' glazes seem quite expensive for the quantity we
need.We even thought of casting them in bronze, but weight and cost were
both high. The bronze does not have to have a high metellic gloss....but
we need something fairly consistent. It for an indoor project.
So I'm trolling for suggestions! Like to hear people's experience good
or bad. with bronze glazes or other methods....also looking for glazes/
recipes we can use as a starting point for glaze tests..
thank you
Stephani Stephenson
arcilla@inetworld.net
Nottingham center for the Arts
steph@nottinghamarts.org
Jane Rekedal on wed 9 jun 99
I suppose you have tried the Duncan antique bronze cone 04 glaze? It's very
metallic and reliable. Lead based, however. Might ask for a quantity
discount...
or try to get it dry, not premixed directly from Duncan (I know they have a
plant in Fresno, CA)
Jane Rekedal
Josh Lynch on wed 9 jun 99
--- Stephani Stephenson wrote:
> ----------------------------Original
> message----------------------------
> I am working on a project with a local tile artist.,
> We need to produce
> a couple of hundred, persian motif, relief tiles
> that look like
> bronze.The entire tile will be 'bronze', not just
> painted highlights.
> Usually we press with a cone 04-02 terra cotta
> body..for this we could
> change the firing temp or even the body in order to
> get a reliable
> bronze.
> There's a process out there whereby a
> metallic coating is be applied to
> bisque(not sure if its electroplating or another
> process) but the
> outsourcing costs on this are pretty high, around $7
> tile. Also,
> commercial 'bronze' glazes seem quite expensive for
> the quantity we
> need.We even thought of casting them in bronze, but
> weight and cost were
> both high. The bronze does not have to have a high
> metellic gloss....but
> we need something fairly consistent. It for an
> indoor project.
> So I'm trolling for suggestions! Like to
> hear people's experience good
> or bad. with bronze glazes or other methods....also
> looking for glazes/
> recipes we can use as a starting point for glaze
> tests..
>
> thank you
> Stephani Stephenson
> arcilla@inetworld.net
> Nottingham center for the Arts
> steph@nottinghamarts.org
From Susan Peterson's, the craft and art of clay
Bill Shillalies' Metallic death glaze
black copper oxide 4
cobalt oxide 2
manganese dioxide 35
ball clay 4
red art 46
flint 4
red iron oxide 2
dark rutile 3
fired to cone 02 application thick, bronze colored, very matte
fired to cone 1, application thick, bronze colored, semi-matte
fired to cone 6, application thick, semi-gloss, metallic-bronze and
antique
(Peterson 357)
This glaze is poisonous unfired. It is poisonous when fired. It is
poisonous on green eggs and Ham. It is poisonous if you breath it, if
you look at it wrong, and maybe you can absorb Mn through your skin?
This glaze should be in the ammendment of the "Susan
Peterson/incompetant" thread - 'cause there ain't no warnings!
This glaze probably isn't even safe for invincible teenagers.
Josh in West Virginia, paranoid
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Mike Gordon on wed 9 jun 99
Stephani,
If your not against acrylic paint, Versatex makes a very good metalic
copper, bronze, and brass paint that can be covered with a clear medium.
Mike
Sharon R Pemberton on wed 9 jun 99
Overglazes are a bit costly, but a little goes a long way. Talk to your
supplier about buying in quantity . You could call Englehard Hanovia in NJ,
at 973-268-7880 of Duncan in Fresno, CA, I do not have that # handy. First
buy a bottle and test. There are also bronze raku glazes.
Pax,
Pug
Mike Bailey on fri 11 jun 99
In message , Stephani Stephenson writes
>----------------------------Original message----------------------------
>I am working on a project with a local tile artist., We need to produce
>a couple of hundred, persian motif, relief tiles that look like
>bronze.The entire tile will be 'bronze', not just painted highlights.
>Usually we press with a cone 04-02 terra cotta body..for this we could
>change the firing temp or even the body in order to get a reliable
>bronze.
> There's a process out there whereby a metallic coating is be applied to
>bisque(not sure if its electroplating or another process) but the
>outsourcing costs on this are pretty high, around $7 tile. Also,
>commercial 'bronze' glazes seem quite expensive for the quantity we
>need.We even thought of casting them in bronze, but weight and cost were
>both high. The bronze does not have to have a high metellic gloss....but
>we need something fairly consistent. It for an indoor project.
> So I'm trolling for suggestions! Like to hear people's experience good
>or bad. with bronze glazes or other methods....also looking for glazes/
>recipes we can use as a starting point for glaze tests..
>
>thank you
>Stephani Stephenson
>arcilla@inetworld.net
>
>Nottingham center for the Arts
>steph@nottinghamarts.org
>
Dear Stephani,
There's a very useful article in a recent Ceramic Review (it was either
no 174 or 175) about bronze/gold glazes.
In my tests I found that the most important oxides were Manganese
Dioxide and Copper Oxide.
The ratio is also important. It seemed to me that the best gold/bronze
colour was from a ratio of Manganese Dioxide 90% to Copper Oxide at 10%.
You can then add some china clay if it's too runny at your firing
temperature. However, you might get away with a neat mixture of the
above at earthenware.
Hope this helps,
Mike
--
Mike Bailey
Bath. U.K.
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