Don & June MacDonald on mon 9 sep 02
In my early experimental days, I decided to see what would happen if you
fired a copper penny on a plate. Cone 8, I think, I was mostly firing
Cone 8 at that time. I would not recommend anyone else doing this. The
penny material ate right through the plate, which was on the bottom
shelf, then right through the bottom shelf, and into the bricks on the
bottom of the kiln. Interesting, but expensive experiment.
At the same time, I wound copper wire, the kind that is in electric
wire, around pots, and had some success, but also some falling off on
the shelf, and copper eats the shelf, see above. I also tried copper
spray paint on top of a glaze, which was very successful, and also
bronze spray paint which was also successful. If I ever get around to
it, I intend to visit our local key cutting shop to acquire some of the
scraps, and sprinkle them on the surface of a plate to see what happens.
June from B.C.
mel jacobson on mon 9 sep 02
a wonderful experiment by a senior boy about 15 years ago
proves that you can wrap copper wire, around a pot, fire
it and the green cupric will attach to the glaze.
see the pot in cm last year.
a cup, in the article on behrens.
it was a testimonial about his work.
the pot was fired to cone 3, gertsley/vol ash glaze.
60/40.
i owned the pot, photographed it, used it for the article
and the young man showed up at my door one day, to visit,
and i gave him the cm/with his pot. he was thrilled.
the unknown craftsman/revisited.
happens all the time.
mel
From:
Minnetonka, Minnesota, U.S.A.
web site: my.pclink.com/~melpots
or try: http://www.pclink.com/melpots
Ann Brink on mon 9 sep 02
Yes, it's great when it works, but sometimes the wire can fall off in bits,
onto your kiln shelf, etc. You might want to put something under your pot
for your first experiments.
I also played around with copper spray paint, over the dry unfired glaze-
adds a green haze (ox. firing)
Ann Brink in CA
----- Original Message -----
From: "mel jacobson"
To:
Sent: Monday, September 09, 2002 8:58 AM
Subject: copper wire
> a wonderful experiment by a senior boy about 15 years ago
> proves that you can wrap copper wire, around a pot, fire
> it and the green cupric will attach to the glaze.
>
> see the pot in cm last year.
> a cup, in the article on behrens.
> it was a testimonial about his work.
>
> the pot was fired to cone 3, gertsley/vol ash glaze.
> 60/40.
>
> i owned the pot, photographed it, used it for the article
> and the young man showed up at my door one day, to visit,
> and i gave him the cm/with his pot. he was thrilled.
>
> the unknown craftsman/revisited.
> happens all the time.
> mel
> From:
> Minnetonka, Minnesota, U.S.A.
> web site: my.pclink.com/~melpots
> or try: http://www.pclink.com/melpots
>
>
Roger Graham on tue 10 sep 02
Somewhere in my logbook from 1990, there are details of tests done using
thin copper wire to obtain copper green colours in a glaze. In particular,
using a cone-8 oxidation glaze we were calling "rutile white matt" which
developed delightful green halo effects around brushwork done in copper
carbonate.
Could one get the same lovely green halo effects by just embedding a thin
copper wire in or on or under the glaze? Try it and see.
Copper wire comes in a variety of sizes, usually expressed as a "Wire
Gauge" number, or by stating its diameter in thousandths of an inch. I made
tests using wires from about 20 gauge (0.032") down to 40 gauge (0.003") and
thinner (0.002")
Short lengths of wire were laid flat on a bisqued platter, and an even coat
of glaze was sprayed over them. Elsewhere on the platter, more lengths of
wire were laid on top of the glaze. Then fired to cone 9, electric.
As expected, thicker wires gave nasty black metallic streaks. The very
thinnest wires gave a little colour, but not enough. Wire of diameter 0.004"
was judged most successful. It gave a handsome green halo, matchstick wide.
Under the glaze, or on top? Didn't seem to make much difference. Both ways
worked fine.
For designs on platters, then, it was simply a matter of forming 0.004" wire
into suitable pieces. Circles, triangles, lines. Overlapping, random,
geometrical. Butterflies. Leaves. Lots of possibilities. Good fun too.
For copper green patterns on vertical surfaces (mugs etc) it was possible to
attach the wire with little dabs of woodworking glue, then glaze over the
top. The glue burned away in the firing, no problem. Spirals, criss-cross
hatchings, random short pieces. A bit fiddly to set up, but gave some very
attractive pots.
Want to try? Wire of diameter 0.004" is about twice as thick as human hair.
If you can't salvage some from an old transformer winding or a telephone
earpiece, you could even buy a little from an electronics shop. In wire
gauge sizes, it's 38 A.W.G. Maybe you could twist two pieces together and
try the effect, rather than buying thicker wire if you're in an
experimenting mood and want to try other sizes.
On my wish list, but haven't tried it yet: What sort of copper-halo effects
might one get by sprinkling brass filings over a glazed platter? Or by
adding fine filings to the glaze? I've salvaged some brass filings from the
key-cutting machine at the local hardware shop, but haven't got around to
trying them. Anybody out there been there, done that?
Ditmar on tue 10 sep 02
Don't know if you were using a US penny, but they're made of aluminum, and
that explains why it "ate" everything. These days "copper" penny is a
misnomer.
Ditmar
----- Original Message -----
From: "Don & June MacDonald"
To:
Sent: Monday, September 09, 2002 6:14 PM
Subject: copper wire
> In my early experimental days, I decided to see what would happen if you
> fired a copper penny on a plate. Cone 8, I think, I was mostly firing
> Cone 8 at that time. I would not recommend anyone else doing this. The
> penny material ate right through the plate, which was on the bottom
> shelf, then right through the bottom shelf, and into the bricks on the
> bottom of the kiln. Interesting, but expensive experiment.
>
> At the same time, I wound copper wire, the kind that is in electric
> wire, around pots, and had some success, but also some falling off on
> the shelf, and copper eats the shelf, see above. I also tried copper
> spray paint on top of a glaze, which was very successful, and also
> bronze spray paint which was also successful. If I ever get around to
> it, I intend to visit our local key cutting shop to acquire some of the
> scraps, and sprinkle them on the surface of a plate to see what happens.
>
> June from B.C.
>
>
____________________________________________________________________________
__
> 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.
>
Rob Van Rens on tue 10 sep 02
Please allow me to interject.
Actually, U.S. pennies are made from zinc, alloyed with a (very) small
amount of aluminum, jacketed with copper, about 1/1,000 inch thick. A
primarily aluminum penny would vaporize in a hot kiln, not eat through the
shelf.
Cool trick - put a penny in a glass of Coke, or phosphoric acid, or any mild
acid (really strong vinegar will do). The zinc will dissolve, leaving the
copper jacket. And if you have a lead terminal, you can make a very crude
battery with it.
Incidentally, U.S. pennies are soft enough that, if you wish, you can cut
them in half with a study scissors.
Robert Van Rens, Workshop Coordinator
Otto Kroeger Associates
703-591-6284, x110 Phone
703-591-8338 Fax
www.typetalk.com
-----Original Message-----
From: Ditmar [mailto:gaylecat@MAUI.NET]
Sent: Tuesday, September 10, 2002 11:00 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: copper wire
Don't know if you were using a US penny, but they're made of aluminum, and
that explains why it "ate" everything. These days "copper" penny is a
misnomer.
Ditmar
----- Original Message -----
From: "Don & June MacDonald"
To:
Sent: Monday, September 09, 2002 6:14 PM
Subject: copper wire
> In my early experimental days, I decided to see what would happen if you
> fired a copper penny on a plate. Cone 8, I think, I was mostly firing
> Cone 8 at that time. I would not recommend anyone else doing this. The
> penny material ate right through the plate, which was on the bottom
> shelf, then right through the bottom shelf, and into the bricks on the
> bottom of the kiln. Interesting, but expensive experiment.
>
> At the same time, I wound copper wire, the kind that is in electric
> wire, around pots, and had some success, but also some falling off on
> the shelf, and copper eats the shelf, see above. I also tried copper
> spray paint on top of a glaze, which was very successful, and also
> bronze spray paint which was also successful. If I ever get around to
> it, I intend to visit our local key cutting shop to acquire some of the
> scraps, and sprinkle them on the surface of a plate to see what happens.
>
> June from B.C.
>
>
____________________________________________________________________________
__
> 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.
>
____________________________________________________________________________
__
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claybair on tue 10 sep 02
I was wondering if using copper/bronze wire/paint causes any damage to kiln
elements?
Gayle Bair
Bainbridge Island, WA
http://claybair.com
-----Original Message-----
From: Don & June MacDonald
In my early experimental days, I decided to see what would happen if you
fired a copper penny on a plate. Cone 8, I think, I was mostly firing
Cone 8 at that time. I would not recommend anyone else doing this. The
penny material ate right through the plate, which was on the bottom
shelf, then right through the bottom shelf, and into the bricks on the
bottom of the kiln. Interesting, but expensive experiment.
At the same time, I wound copper wire, the kind that is in electric
wire, around pots, and had some success, but also some falling off on
the shelf, and copper eats the shelf, see above. I also tried copper
spray paint on top of a glaze, which was very successful, and also
bronze spray paint which was also successful. If I ever get around to
it, I intend to visit our local key cutting shop to acquire some of the
scraps, and sprinkle them on the surface of a plate to see what happens.
June from B.C.
____________________________________________________________________________
__
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.
Hendrix, Taylor J. on tue 10 sep 02
I think the modern U.S. penny is a zinc blank covered in an envelope of =
copper, rather than aluminum.
Taylor
-----Original Message-----
From: Ditmar [mailto:gaylecat@MAUI.NET]
Sent: Tuesday, September 10, 2002 10:00 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: copper wire
Don't know if you were using a US penny, but they're made of aluminum, =
and
that explains why it "ate" everything. These days "copper" penny is a
misnomer.
Ditmar
----- Original Message -----
From: "Don & June MacDonald"
To:
Sent: Monday, September 09, 2002 6:14 PM
Subject: copper wire
> In my early experimental days, I decided to see what would happen if =
you
> fired a copper penny on a plate. Cone 8, I think, I was mostly firing
> Cone 8 at that time. I would not recommend anyone else doing this. =
The
> penny material ate right through the plate, which was on the bottom
> shelf, then right through the bottom shelf, and into the bricks on the
> bottom of the kiln. Interesting, but expensive experiment.
>
> At the same time, I wound copper wire, the kind that is in electric
> wire, around pots, and had some success, but also some falling off on
> the shelf, and copper eats the shelf, see above. I also tried copper
> spray paint on top of a glaze, which was very successful, and also
> bronze spray paint which was also successful. If I ever get around to
> it, I intend to visit our local key cutting shop to acquire some of =
the
> scraps, and sprinkle them on the surface of a plate to see what =
happens.
>
> June from B.C.
>
>
_________________________________________________________________________=
___
__
> 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.
>
_________________________________________________________________________=
_____
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.
BVCuma on tue 10 sep 02
see the pot in cm last year.
a cup, in the article on behrens.
it was a testimonial about his work.
____________________
I remember the article..
and the very excellent vase
by Craig Martell.
Bruce
Snail Scott on wed 11 sep 02
At 06:34 PM 9/11/02 -0500, you wrote:
>...It is hard to imagine how
>a zinc coin sheathed in copper could possibly be cheaper to produce than a
>solid copper coin...
The US domestic copper industry has faced rising costs
for many years, and the US now imports nearly all its
copper from Chile.
-Snail
vince pitelka on wed 11 sep 02
Taylor wrote"
"I think the modern U.S. penny is a zinc blank covered in an envelope of
copper, rather than aluminum."
I stand corrected. I knew it wasn't aluminum, because they are too heavy,
and I just assumed they were still solid copper. It is hard to imagine how
a zinc coin sheathed in copper could possibly be cheaper to produce than a
solid copper coin, but I guess in sufficient numbers it must save money.
That is the only conceivable reason why they would do it.
- Vince
Vince Pitelka
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
Home - vpitelka@worldnet.att.net
615/597-5376
Work - wpitelka@tntech.edu
615/597-6801 ext. 111, fax 615/597-6803
http://www.craftcenter.tntech.edu/
Giles on wed 11 sep 02
My husband used to save the dust from his silver projects for me to sprinkle
on raku. Made gold and copper specks on clear or white glaze.
Kristen Giles
Rob Van Rens on fri 13 sep 02
Vince:
I took the liberty of going to the Treasury Dept. in DC and asking why they
produce pennies out of pot metal.
I spoke to a very helpful gentleman who pointed out that if pennies were
copper, they'd be worth more as scrap copper than as currency (a copper
penny is worth more than 1 cent by weight in copper). Zinc is cheap.
Really cheap. And they use a pretty crappy grade of it. The coins are
minted in zinc, then plated in copper, really really thin. The copper isn't
actually there for looks, but to protect the zinc disc from unneccessary
wear. Turns out Sacaja-hooies are made the same way, but plated with
beryllium instead of copper, for that nice golden luster.
So, yeah, it is vastly cheaper to use zinc instead of copper. And anything
than get Uncle Sugar to spend less is probably good, right?
-----Original Message-----
From: vince pitelka [mailto:vpitelka@DTCCOM.NET]
Sent: Wednesday, September 11, 2002 7:34 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: copper wire
Taylor wrote"
"I think the modern U.S. penny is a zinc blank covered in an envelope of
copper, rather than aluminum."
I stand corrected. I knew it wasn't aluminum, because they are too heavy,
and I just assumed they were still solid copper. It is hard to imagine how
a zinc coin sheathed in copper could possibly be cheaper to produce than a
solid copper coin, but I guess in sufficient numbers it must save money.
That is the only conceivable reason why they would do it.
- Vince
Vince Pitelka
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
Home - vpitelka@worldnet.att.net
615/597-5376
Work - wpitelka@tntech.edu
615/597-6801 ext. 111, fax 615/597-6803
http://www.craftcenter.tntech.edu/
____________________________________________________________________________
__
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.
Virgil and Susan Leise on mon 19 jul 04
I have a question about using copper wire. What happens to a thin =
copper wire if it were wrapped around a pot and fired to cone 04, cone 6 =
???
Warren Heintz on mon 19 jul 04
> I had a student once,elementary, that unknown to me,
stuck a penny into the wall of a pinch pot that was
bisqued to 04. I chewwd him out for it but I do admit
it raised my curiousity. There was some green residue
in the clay, a white flaky material. But since the
penny was in the clay there wasn't much surface
coloration. I've always wanted to line the bottom of a
bowl/pot with pennies to sewhat would happen but now
rarity if even do pots, work mainly sculpturally.
>
>
______________________________________________________________________________
> 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.
>
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Ann Brink on mon 19 jul 04
If there is glaze on the pot, you get some really strong green lines. If
the wire melts into sections and falls on your kiln shelf, you get black
lines on your kiln wash, maybe even right through it.
Ann Brink in Lompoc CA
----- Original Message -----
From: "Virgil and Susan Leise"
To:
Sent: Monday, July 19, 2004 7:50 AM
Subject: copper wire
I have a question about using copper wire. What happens to a thin copper
wire if it were wrapped around a pot and fired to cone 04, cone 6 ???
____________________________________________________________________________
__
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/
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Ivor and Olive Lewis on tue 20 jul 04
Dear Virgil and Susan Leise,
Copper wire melts and oxidises at cone 6 and it will oxidise heavily
at cone 04.
But perhaps your question should have been, "What happens to clay and
glaze when copper wire is place on a pot and then fired?"
The answer to that question is "Very interesting things ! !"
Best regards,
Ivor Lewis.
Redhill,
S. Australia.
Graeme Anderson on tue 20 jul 04
In my experiments with copper wire on glazes at cone 4 and cone 10, I find
that if the glaze has zinc in it, I get black crystaline lines which spread
out. If no zinc in the glaze, the lines are green, and do not spread out.
The crystaline appearance is similar to the galvanized iron for roofing.
There are some examples on my "experiments" page, and also on "More
Crystals".
http://www.ceinternet.com.au/~gemopal/
Cheers. Graeme.
Earl Brunner on tue 20 jul 04
When doing this, remember that modern U.S. pennies are NOT copper.
Earl Brunner
Las Vegas, NV
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Warren Heintz
Sent: Monday, July 19, 2004 8:36 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: copper wire
> I had a student once,elementary, that unknown to me,
stuck a penny into the wall of a pinch pot that was
bisqued to 04. I chewwd him out for it but I do admit
it raised my curiousity. There was some green residue
in the clay, a white flaky material. But since the
penny was in the clay there wasn't much surface
coloration. I've always wanted to line the bottom of a
bowl/pot with pennies to sewhat would happen but now
rarity if even do pots, work mainly sculpturally.
>
>
Ellie Blair on tue 20 jul 04
----- Original Message -----=20
From: Ivor and Olive Lewis=20
To: CLAYART@LSV.CERAMICS.ORG=20
But perhaps your question should have been, "What happens to clay and
glaze when copper wire is place on a pot and then fired?"
The answer to that question is "Very interesting things ! !"
Best regards,
Ivor Lewis.
Redhill,
S. Australia.
Sent: Monday, July 19, 2004 9:25 PM
Subject: Re: copper wire
I use copper wire in my crystalline glazes. I fire to cone 9 in =
oxidation. I have some very interesting results. It depends on the =
guage of wire you are using. The finer the guage the better. My best =
results have been with 32 or 28 guage. These two guages incorporate =
into the glaze without leaving any raised areas. The raised areas can =
also be interesting can create unusual effects but I feel anything =
larger than 28g undesireable in crystalline.
Ellie Blair
=
_________________________________________________________________________=
_____
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.
Warren Heintz on tue 20 jul 04
--- Earl Brunner wrote:
>
Thanks, I have some thin copper foil that I could use.
When doing this, remember that modern U.S. pennies
> are NOT copper.
>
> Earl Brunner
> Las Vegas, NV
>
>
> >
> >
>
>
______________________________________________________________________________
> 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/
>
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> reached at melpots@pclink.com.
>
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Ivor and Olive Lewis on wed 21 jul 04
Dear Ellie Blair,
Just goes to show what can be revealed when the we rethink the
proposition. You have given us something great with your idea. I hope
the original questioner appreciates what you are telling them.
Best regards,
Ivor Lewis.
Redhill,
S. Australia.
Snail Scott on wed 21 jul 04
At 08:36 PM 7/19/04 -0700, you wrote:
>> I had a student once,elementary, that unknown to me,
>stuck a penny into the wall of a pinch pot...There was some green residue
>in the clay, a white flaky material.
Pennies have been made of copper-plated zinc
for a long time now. Not an efficient source
of copper, but I admit I haven't really
thought of uses for chunx'o'zinc in ceramics...
Anybody?
-Snail
Robert Huskey on wed 21 jul 04
A good source of scrap copper is a metal scrap yard .You know, they have a
big sign wanting to buy aluminum cans . They also buy other metals , and
every one that I have seen will sell metal also . You could of course keep
an eye on your change . there are some copper pennies still in circulation .
A couple of weeks ago , I found a 1907 Indian Head (Fine cond) penny in
change .
Bob Huskey --- Tallahassee , Fl. USA
----- Original Message -----
> >
> Pennies have been made of copper-plated zinc
> for a long time now. Not an efficient source
> of copper, but I admit I haven't really
> thought of uses for chunx'o'zinc in ceramics...
> Anybody?
>
> -Snail
>
Roger Graham on wed 21 jul 04
For Virgil & Susan, asking "What happens to a thin copper wire if it were
wrapped around a pot and fired to cone 04, cone 6 ?"
I can't answer for cone 04 or 06, but do have some results from tests done
at cone 10, ages ago (December 1989... wow. Where has my life gone?). It
took a while to dig up the kiln log books from so far back.
As you'd expect, what happens depends on the thickness of the wire. Tests
were done with different gauges of enamelled copper wire, wrapped around a
glaze sampler shaped like a napkin ring. Ends twisted, then sampler dipped
approx 3 seconds in glaze. Two different white glazes recorded in the log,
with similar results for both. Electric kiln, oxidation of course.
There were four different wires involved. The thickest was 0.014 inches,
followed by 0.007" and 0.007", down to the thinnest available at 0.014"
For comparison, a human hair is about 0.002"
What happened? This is what's recorded in the log:
0.014" wire is mistake. Black all over. Fused glaze runs down and pools on
shelf.
0.007" on magnesia white glaze makes zebra stripes. Too dark on rutile white
matt glaze.
0.004" wire very promising. Brown line with green flash with rutile white
matt.
0.014" brown line with magnesia white.
As I recall it from the time, we decided that 0.004" wire on the rutile
white matt glaze was an interesting way to go, and made a series of platters
with geometrical designs laid out on the flat surface. Straight lengths of
wire tastefully placed in a sort of pseudo-random pattern like straws
scattered on the plate. Circles, triangles, cross-hatch # patterns and so
on. The general effect wasn't as nasty as you'd expect. Thin brown lines
with a pastel green flash extending about 5 mm wide. All sold long ago...
they can't have been all that bad.
How to attach wire on a vertical surface such as the side of a mug? Tried
sticking bits of the wire over the already-glazed but unfired mug using
small dabs of wood-working glue, followed by a little spray of the same
glaze to bind it down. Worked OK too, with some attractive effects, but slow
and
fiddly.
You have me wondering now. What might happen if I do this all again but aim
for a copper red effect in a clear base glaze? Hmmm.
Roger Graham, near Gerringong, Australia
http://members.optusnet.com.au/~rogergraham
Pat Southwood on fri 19 may 06
Hi
Re copper stuff on pots - - BE CAREFULL.
I have seen sooooo many students intent on trying this.
College is the place to try things, ef their kiln shelves, not yours.
If you put a copper 2p piece in the bottom of a little pot it eats its =
way through the bottom of the pot and does for your shelf.
If you are messing about with copper stand it on a broken piece of kiln =
shelf, or pay up.
Pat Southwood.
Earl Brunner on sat 20 may 06
You might get enough "flash" off the wire if you do the
wire on a bisque firing, not a glaze firing. Many
years ago I did this on some pots in saggers at lower
temperatures, and then refired to high fire. Not sure
what temp the saggers got to though, melting point of
copper is around 1984 F. As long as you stay some
below that you should be OK. Got some fairly
interesting results as I remember.
Earl Brunner
Las Vegas, NV
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On
Behalf Of val
Sent: Saturday, May 20, 2006 7:18 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: copper wire
Thanks for the info....I saw this wrapped around a pot
in a clay mag. and thought it would be neat to do..I
guess not eh? I can't afford to be buying more
shelves....LOL...I so wanted to try it for something
different though...dang it all!!!
Happy Saturday
Val
Hi
Re copper stuff on pots - - BE CAREFULL.
I have seen sooooo many students intent on trying this.
College is the place to try things, ef their kiln
shelves, not yours. If you put a copper 2p piece in the
bottom of a little pot it eats its way through the
bottom of the pot and does for your shelf. If you are
messing about with copper stand it on a broken piece of
kiln shelf, or pay up.
Pat Southwood.
val on sat 20 may 06
Thanks for the info....I saw this wrapped around a pot
in a clay mag. and thought it would be neat to do..I
guess not eh? I can't afford to be buying more
shelves....LOL...I so wanted to try it for something
different though...dang it all!!!
Happy Saturday
Val
Hi
Re copper stuff on pots - - BE CAREFULL.
I have seen sooooo many students intent on trying this.
College is the place to try things, ef their kiln
shelves, not yours. If you put a copper 2p piece in the
bottom of a little pot it eats its way through the
bottom of the pot and does for your shelf. If you are
messing about with copper stand it on a broken piece of
kiln shelf, or pay up.
Pat Southwood.
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Pat Southwood on sun 21 may 06
HI,
Val, if you wrap thin copper wire around the neck of a bottle (say) then =
you will just get black marks where it touches, think of glazes that you =
have painted over with too much copper on the brush and you get a =
metallic black, with copper but no glaze you just get the matte black, =
- I really meant be carefull with big bits.
Presumably (?) what gets left on the pot after wire is copper oxide =
anyway????
Have fun, if in doubt make yourself a sagger out of a groggy clay and =
use that for any dodgy experiments.
Takes a few minutes and saves a lot of money.
Pat Southwood
Ivor and Olive Lewis on sun 21 may 06
Dear Val,
First , copper wire. If you are adept as a knotter or crochet-er r can =
make knots or twist wires together it is possible to make wonderful =
linear patterns around the body of a pot or to create designs to rest =
inside bowls or on plates.
Second, audio tape. The coating on this stuff is mostly Iron Oxide =
though in some cases Chromium oxide may be used to modify the magnetic =
qualities. The only problem I see is getting the pigment to adhere to =
the clay before the plastic base burns away.
If you are firing in an electric kiln then place these pots towards the =
centre of the load and shield the elements with neutral pots.
Have fun with your experiments.
Best regards,
Ivor Lewis.
Redhill,
South Australia.
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