Talbott on thu 29 may 97
Does any such glaze exist? (Yellow glossy glaze cone 9/10 reduction...)
1ST ANNUAL CLAYARTERS' GALLERY - NAPLES, MAINE (Summer 1997)
http://fmc.utm.edu/~dmcbeth/cag/naples.htm
Celia & Marshall Talbott, Pottery By Celia, Route 114, P O Box 4116,
Naples, Maine 04055-4116,(207)693-6100 voice and fax,(call first)
WBS Live Chat Room, Sat Nites 10 PM EDT, Private Room: Clayarters
Karl P. Platt on fri 30 may 97
Of course such glazes exist. Take any bright cone 10 base and add 4-8
wt% Zr-Pr yellow stain to it.
Peggy Heer on fri 30 may 97
Hi Marshall ...yes it does...I got a porcelain piece, a bowl, that I fired
at cone 10 reduction, which was very bright yellow and BEAUTIFUL. It
happened in my very last porcelain load, 1989, I had worked exclusively
with porc. for 10 yrs., and I was very excited. The glaze was a glaze I
got out of Peter Lane's book "Studio Porcelain" and I simply over dosed it
with yellow stain. The glaze was a shiny white base. No one was more
surprised than me. I had fired the kiln and it had cooled for 2 days and
was still too hot to unload so I left it as is, sealed, and left on 2 weeks
holidays. I never saw the results of the firing till we got back. My kids,
older teens at the time, unloaded the work as a surprise for me when we got
back. It was a realllll surprise. I got so many great colors in that
load..pinks, which were real bright pinks, not baby pinks, brilliant
yellows and a few others that are difficult to get in reduct. I would/could
share with you the how -tos but all I know now is the above mentioned thing
I did. I would have to dig in some unpacked box or other to find my records
but will if you insist. ;>}}}}.
By the way...the yellow piece is in a 30 yr. retrospective show in Grand
Forks, BC.
As Always in Clay Peggy
>----------------------------Original message----------------------------
>Does any such glaze exist? (Yellow glossy glaze cone 9/10 reduction...)
>
> 1ST ANNUAL CLAYARTERS' GALLERY - NAPLES, MAINE (Summer 1997)
> http://fmc.utm.edu/~dmcbeth/cag/naples.htm
>
> Celia & Marshall Talbott, Pottery By Celia, Route 114, P O Box 4116,
> Naples, Maine 04055-4116,(207)693-6100 voice and fax,(call first)
> WBS Live Chat Room, Sat Nites 10 PM EDT, Private Room: Clayarters
Peggy Heer / Heer Pottery E-Mail p4337@connect.ab.ca
52120 Range Road 223
Sherwood Park, AB. Canada T8C 1A7
Phone (403) 922-6270
http://www.ffa.ucalgary.ca/artists/pheer/
"Rafael Molina-Rodriguez (Rafael Molina-Rodriguez)" on sun 1 jun 97
Karl :
% of Zr-Pr stain may work, but I don't believe the hue, value, and intensity
will be the same as the color and texture achieved by Brother Thomas and
Cliff Lee.
I've read where Bro. Thomas uses Iron for his "saffron yellow." I'm not
sure how Cliff Lee achieves his high fire yellow. I remember a while back
fellow clayarter, John Tilton, saying it had to do with some type of
imported ash. IMHO, their hi-fire yellows are truly a spectacular technical
feat on par with other quality hi-fire glazes such as copper red, copper
purple, etc.,... Unfortunately, neither artist seems to be keen on sharing
materials and processes.
Rafael
rmr3431@dcccd.edu
>>> "Karl P. Platt" 05/30/97 10:00am >>>
----------------------------Original message----------------------------
Of course such glazes exist. Take any bright cone 10 base and add 4-8
wt% Zr-Pr yellow stain to it.
Karl P. Platt on mon 2 jun 97
>% of Zr-Pr stain may work, but I don't believe the hue, value, and >intensity w
I do. There are any number of SCREAMING yellow Zr stains available --
Pemco's GS-1 was excellent. I used this in a cone 10 reduction firing
some years back and was highly pleased with the bellicose yellow -- the
local potters, however, were much less than enthused. It was a bit much,
I'll admit. More interesting, however, were some of the modifications
made to produce a cone 10 ORANGE that still warrants futher study as
this color is absent at higher temperatures.
Talbott on mon 2 jun 97
Rafael thanks for the reply...
I am aware of stains producing yellows but have not been very impressed
with the quality of the yellows that result..
I was wondering if chromium could produce yellow under certain conditions
or the combination of chromium and some other element(s)... Copper can
produce reds, purples, blues and greens under various conditions perhaps
some of these other elements can do likewise for yellow.... Perhaps iron,
nickle, chromium, barium, or cobalt either alone or in combination could be
persuaded to generate yellow... I am sure that some glaze experts must
have some experience with this... Marshall
1ST ANNUAL CLAYARTERS' GALLERY - NAPLES, MAINE (Summer 1997)
http://fmc.utm.edu/~dmcbeth/cag/naples.htm
T-SHIRT order for 1st Annual Clayarters' Gallery being placed on 6/4/97
contact me directly for more information
Celia & Marshall Talbott, Pottery By Celia, Route 114, P O Box 4116,
Naples, Maine 04055-4116,(207)693-6100 voice and fax,(call first)
WBS Live Chat Room, Sat Nites 10 PM EDT, Private Room: Clayarters
Talbott on mon 2 jun 97
I was under the impression that uranium oxide when used in a glaze would
produce a bright orangy-red color..almost florescent orange.. I have seen
some old plates glazed with the material and they really make a geiger
counter click really fast! How about a more inert material that is NOT a
stain...
.....Marshall
PS... Maine Yankee is going off-line for keeps....
1ST ANNUAL CLAYARTERS' GALLERY - NAPLES, MAINE (Summer 1997)
http://fmc.utm.edu/~dmcbeth/cag/naples.htm
T-SHIRT order for 1st Annual Clayarters' Gallery being placed on 6/4/97
contact me directly for more information
Celia & Marshall Talbott, Pottery By Celia, Route 114, P O Box 4116,
Naples, Maine 04055-4116,(207)693-6100 voice and fax,(call first)
WBS Live Chat Room, Sat Nites 10 PM EDT, Private Room: Clayarters
Pierre Brayford on tue 3 jun 97
> some of these other elements can do likewise for yellow.... Perhaps iron,
> nickle, chromium, barium, or cobalt either alone or in combination could be
> persuaded to generate yellow...
This rang a bell.. A Janice Tchalenko recipe published in Ceramic Review
in 1983, uses barium and iron to give a yellow.
Potash Feldspar 45
Barium Carbonate 20
Talc 10
China Clay(kaolin) 7
Zirconium Silicate 15
Whiting 3
Red Iron Ox 3
This was for cone 8 reduction - I tried it at ^9-10 and it was still OK
It was used over a white glaze so I don't know how it is on its own.
Also it wasn't really a gloss!
However it may provide a starting point.
Talbott on wed 4 jun 97
I just thought of this... One little problem about combining colors to get
yellow... Yellow is a PRIMARY COLOR true?... Marshall
>----------------------------Original message----------------------------
>> some of these other elements can do likewise for yellow.... Perhaps iron,
>> nickle, chromium, barium, or cobalt either alone or in combination could be
>> persuaded to generate yellow...
>
>This rang a bell.. A Janice Tchalenko recipe published in Ceramic Review
>in 1983, uses barium and iron to give a yellow.
>
>Potash Feldspar 45
>Barium Carbonate 20
>Talc 10
>China Clay(kaolin) 7
>Zirconium Silicate 15
>Whiting 3
>Red Iron Ox 3
>
>This was for cone 8 reduction - I tried it at ^9-10 and it was still OK
>It was used over a white glaze so I don't know how it is on its own.
>Also it wasn't really a gloss!
>
>However it may provide a starting point.
1ST ANNUAL CLAYARTERS' GALLERY - NAPLES, MAINE (Summer 1997)
http://fmc.utm.edu/~dmcbeth/cag/naples.htm
T-SHIRT order for 1st Annual Clayarters' Gallery being placed on 6/4/97
contact me directly for more information
Celia & Marshall Talbott, Pottery By Celia, Route 114, P O Box 4116,
Naples, Maine 04055-4116,(207)693-6100 voice and fax,(call first)
WBS Live Chat Room, Sat Nites 10 PM EDT, Private Room: Clayarters
Gavin Stairs on thu 5 jun 97
At 09:14 AM 04/06/97 EDT, Marshall wrote:
>----------------------------Original message----------------------------
>I just thought of this... One little problem about combining colors to get
>yellow... Yellow is a PRIMARY COLOR true?... Marshall
Hi Marshall,
True. But in glaze formulations, we are not always adding colors when we
compound glazes. We are making a chemical stew in which one colorant may
affect another so as to change its color. What is actually happening is
that the chemical bonds that hold the glaze together are changed, and as a
result, the electrons, which give us the color by absorbing and emitting
light photons of particular wavelength, may find themselves in a different
state. This can affect the color, and not always in the way we might
suppose from our experience with paints, for example. Most paints are mere
mixtures of colorants in a binder, and mixing pigments does not change
their individual character. Not so in glazes. So predicting color in
glazes is quite a bit more complicated. Nevertheless, we are all familiar
with the normal colors of certain ions in particular oxidation states.
Look at any stain list to see these. Then look at the fine print which
tells of certain interactions which are well known. Then think of the many
colors of iron and copper, to name only the most common.
Gavin
Gavin
=================================
Gavin Stairs
http://isis.physics.utoronto.ca/
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