Joyce Lee, Jim Lee on tue 26 nov 96
Rafael,
I have a saggar ready to go for your celadons. One question: Where do
you buy yellow iron oxide? You have helped me before and I do
appreciate your thoughtful responses.
Joyce
Struggling straggler in clay....in the Mojave
Diane Woloshyn on mon 19 oct 98
Have checked all my books and references and can find on mention of Yellow
Iron Oxide. Yet I have a bag of it sitting on my shelf. Probably bought for
some recipe I saw. Since I am now trying to take a more scientific approach
to glaze formulation I need more info. What are the properties of this oxide?
Or can anyone point me to a reference. (Hamers doesn't mention it).
Thanks.
Diane Florida Bird Lady
Gavin Stairs on tue 20 oct 98
Hi Diane,
It's probably an impure limonite, which is a hydrate of ferric and/or
ferrous iron. You'll have to test it to see what its coloring properties
are, but you can probably use it much as you would a red iron oxide.
From the net:
"Limonite
The Hydrous Iron Oxide -FeO(OH) + -FeO(OH) which is a mixture of the and
phases of unknown composition. Differences in color, as observed from a
streak test, can distinguish the two phases if they are not mixed too
closely. "
"Limonite
----------------------------------------------------------------------------
----
Limonite is an ore of iron, and it causes coloration in soil. The
widespread and common hydrated iron oxide mineral limonite is a minor ore
of iron and a source of ocher and umber pigments. Having no crystalline
form and containing highly variable amounts of water, limonite forms
yellowish earthy coatings or brown to blackish, stalactitic, grapelike, or
fibrous masses and concretions. Hardness is 4-5.5, luster is silky or
earthy, streak is yellowish brown, and specific gravity is 2.7-4.3. Much of
the material formerly thought to be limonite now is known to be goethite,
which is crystalline and has a definite chemical composition. Limonite,
always formed from the oxidation (weathering) of other iron minerals, is
common in the gossan capping of sulfide deposits, in marshes as bog iron
ore, and in oolites. "
Gavin
At 09:05 AM 19/10/98 EDT, you wrote:
>----------------------------Original message----------------------------
>Have checked all my books and references and can find on mention of Yellow
>Iron Oxide. Yet I have a bag of it sitting on my shelf. ...
stairs@stairs.on.ca
416 530 0419 (home) 416 978 2735 (work)
Toronto, Ontario, Canada
Earl Brunner on tue 20 oct 98
We get ours from Aardvark Ceramic supply, we like it because it is much finner i
particle size then other iron oxides seem to be. It may be similiar to Yellow
Ochre, but I am not sure it is the same, I know that it is light and fluffly an
takes up a lot of volume to get the weight when measuring. I use it as a 1 to 1
replacement for red with good results.
Diane Woloshyn wrote:
> ----------------------------Original message----------------------------
> Have checked all my books and references and can find on mention of Yellow
> Iron Oxide. Yet I have a bag of it sitting on my shelf. Probably bought for
> some recipe I saw. Since I am now trying to take a more scientific approach
> to glaze formulation I need more info. What are the properties of this oxide?
> Or can anyone point me to a reference. (Hamers doesn't mention it).
>
> Thanks.
>
> Diane Florida Bird Lady
Joyce Lee on tue 20 oct 98
I'm using the yellow iron oxide often now while experimenting with
celadons, which are beginning to look a bit blah to me. (Are we never
satisfied?) It goes by the name "yellow ochre" in some supply houses,
and is a natural hydrated iron oxide mixed in with some clay.
Joyce
In the Mojave
Debby Grant on tue 20 oct 98
It's probably yellow ochre, which is another form of iron.
Best, Debby Grant in NH
Edouard Bastarache on tue 20 oct 98
Hello Diane,
in Sial's catalog, my materials supplier in Montreal,
i found the following anlysis of Yellow Iron:
-Sio2 10.80%
-Fe2o3 78.80%
-Cao 10.40%
Later,
Edouard Bastarache
edouardb@sorel-tracy.qc.ca
http://www.sorel-tracy.qc.ca/~edouardb/
----------
> De : Diane Woloshyn
> A : CLAYART@LSV.UKY.EDU
> Objet : Yellow iron oxide
> Date : 19 octobre, 1998 09:05
>
> ----------------------------Original message----------------------------
> Have checked all my books and references and can find on mention of
Yellow
> Iron Oxide. Yet I have a bag of it sitting on my shelf. Probably bought
for
> some recipe I saw. Since I am now trying to take a more scientific
approach
> to glaze formulation I need more info. What are the properties of this
oxide?
> Or can anyone point me to a reference. (Hamers doesn't mention it).
>
> Thanks.
>
>
> Diane Florida Bird Lady
Rick Sherman on tue 20 oct 98
Have checked all my books and references and can find on mention of
Yellow Iron Oxide. Yet I have a bag of it sitting on my shelf.
Probably bought for some recipe I saw. Since I am now trying to take a
more scientific approach to glaze formulation I need more info. What
are the properties of this oxide? Or can anyone point me to a
reference. (Hamers doesn't mention it).
Thanks.
Diane Florida Bird Lady
-----------------------------Reply-------------------------------------
It is Fe203, Ferric Oxide with 3dH20. It is yellow ochre. You will find
it mentioned as such by Hamer and Robin Hopper also mentions it in
Ceramic Spectrum.
Rick Sherman
San Jose, USofA
sherman@ricochet.net
Keith Chervenak on tue 20 oct 98
Columbus Clay has it listed in their '98 catalog. A call to them might
get more info.
Keith
Keith Chervenak
kac2@po.cwru.edu
216-368-4944
Case Western Reserve University
Department of Medicine
Division of Infectious Diseases
Cleveland, Ohio U.S.A.
Dennis Davis on tue 20 oct 98
Following is from the A.R.T. Studio Clay Co. Catalog:
Iron Oxide, Yellow: 2Fe2O3 3H2O Concentrated form of yellow ochre.
Hydrated form of iron oxide.
Dennis in Stafford, VA
------------------------------------------------------------------
Earl Brunner wrote:
> It may be similiar to Yellow
> Ochre, but I am not sure it is the same, I know that it is light and fluffly
> takes up a lot of volume to get the weight when measuring. I use it as a 1 to
> replacement for red with good results.
>
> Diane Woloshyn wrote:
>> Have checked all my books and references and can find on mention of Yellow
> > Iron Oxide. Yet I have a bag of it sitting on my shelf. Probably bought fo
> > some recipe I saw. Since I am now trying to take a more scientific approach
> > to glaze formulation I need more info. What are the properties of this oxid
> > Or can anyone point me to a reference. (Hamers doesn't mention it).
Ernesto Burciaga on wed 21 oct 98
from my files
IRON OXIDE, SPANISH/YELLOW ( SEE HYDRATED FERRIC OXIDE) An iron
variety, fires dark brown to black . Used primarily for iron
decoration under and on the pre fired glaze surface. Refractory
coloring oxide much the same as other iron oxides.
Ernesto
David McBeth on wed 21 oct 98
from Ceramics Vol. 2 Introduction to Ceramics by Edward P. McNamara,
published by Penn State College, 1947.
page 35
Limonite, 2Fe2O3 - 3H20 is the hydrous iron oxide and is the impurity
responsible for the yellow to brown color of clays. It also may be
uniformly distributed through the clay or it may occur in small nodules
resulting from the alteration of some other iron minerals.
--
David McBeth, MFA
Associate Professor of Art
330 B Gooch Hall
University of Tennessee at Martin
Martin, TN 38238
901-587-7416
http://fmc.utm.edu/~dmcbeth/dmcbeth.htm
Stephen Mills on wed 21 oct 98
In message , Diane Woloshyn writes
>----------------------------Original message----------------------------
>Have checked all my books and references and can find on mention of Yellow
>Iron Oxide. Yet I have a bag of it sitting on my shelf. Probably bought for
>some recipe I saw. Since I am now trying to take a more scientific approach
>to glaze formulation I need more info. What are the properties of this oxide?
>Or can anyone point me to a reference. (Hamers doesn't mention it).
>
>Thanks.
>
>
>Diane Florida Bird Lady
>
Try looking for it under the name yellow ochre, we sell it and use both
names for it.
Steve Mills
BPS
Bath UK
--
Steve Mills
Bath
UK
home e-mail: stevemills@mudslinger.demon.co.uk
work e-mail: stevemills@bathpotters.demon.co.uk
own website: http://www.mudslinger.demon.co.uk
BPS website: http://www.bathpotters.demon.co.uk
Gary Hill on mon 26 oct 98
At 09:05 19/10/98 EDT, you wrote:
>----------------------------Original message----------------------------
>Have checked all my books and references and can find on mention of Yellow
>Iron Oxide.
I have run the yellow ochre that I use here through an XRF and come up
with the following chemical analysis. The Seger that will suit you best is
the first one, flux as unity and for reduction firing. My spreadsheet is
set up to give the seger of the materials as they would be in the fired
glaze (oxidation/reduction) and with a choice of unity with flux (for
higher flux content eg glazes) or alumina (for low flux/high alumina
content eg clays) Im a trifle busy at the momment, packing an Anagama kiln
for my final folio and all the end of degree stress etc, but as a matter of
interest will run my sample through the XRD and get back to you with the
results in a few weeks (this will give you an idea of the minerals in the
sample).
NAME Yellow Ochre FIRED IN REDUCTION
ELEMENT WEIGHT MOL WEIGHT MOL PARTS FLUX UNITY SEGER FORM
K2O 0.020 94.203 0.000 K2O 0.000
Na2O 0.430 61.979 0.007 Na2O 0.007
CaO 0.370 56.079 0.007 CaO 0.007
MgO 0.050 40.311 0.001 MgO 0.001
MnO 0.030 70.937 0.000 MnO 0.000
Li2O 29.877 0.000 Li2O 0.000
FeO 71.846 0.918 FeO 0.983
Al2O3 8.490 101.961 0.083 Al2O3 0.089
P2O5 0.120 141.945 0.001 P2O5 0.001
B2O3 69.620 0.000 B2O3 0.000
SiO2 17.050 60.085 0.284 SiO2 0.304
TiO2 0.180 79.899 0.002 TiO2 0.002
Fe2O3 73.260 65.934 0.918 TOTAL FLUX 1.000
MOLEC WEIGHT 99.316 TOTAL ALK FLUX 0.008
L.O.I. 14.823 PERCENT Al2O3 to SiO2 = 1: 3.408
NAME Yellow Ochre FIRED IN REDUCTION
ELEMENT WEIGHT MOL WEIGHT MOL PARTS Al2O3 UNITY SEGER FORM
K2O 0.020 94.203 0.000 K2O 0.003
Na2O 0.430 61.979 0.007 Na2O 0.083
CaO 0.370 56.079 0.007 CaO 0.079
MgO 0.050 40.311 0.001 MgO 0.015
MnO 0.030 70.937 0.000 MnO 0.005
Li2O 0.000 29.877 0.000 Li2O 0.000
FeO 0.000 71.846 0.918 FeO 11.021
Al2O3 8.490 101.961 0.083 Al2O3 1.000
P2O5 0.120 141.945 0.001 P2O5 0.010
B2O3 0.000 69.620 0.000 B2O3 0.000
SiO2 17.050 60.085 0.284 SiO2 3.408
TiO2 0.180 79.899 0.002 TiO2 0.027
Fe2O3 73.260 65.934 0.918 TOTAL FLUX 11.206
MOLEC WEIGHT 1112.972 TOTAL ALK FLUX 0.086
L.O.I. 14.823 PERCENT Al2O3 to SiO2 = 1: 3.408
NAME Yellow Ochre FIRED IN OXIDATION
ELEMENT WEIGHT MOL WEIGHT MOL PARTS FLUX UNITY SEGER FORM
K2O 0.020 94.203 0.000 K2O 0.014
Na2O 0.430 61.979 0.007 Na2O 0.450
CaO 0.370 56.079 0.007 CaO 0.428
MgO 0.050 40.311 0.001 MgO 0.080
MnO 0.030 70.937 0.000 MnO 0.027
Li2O 0.000 29.877 0.000 Li2O 0.000
Fe2O3 73.260 159.690 0.459 Fe2O3 29.768
Al2O3 8.490 101.961 0.083 Al2O3 5.403
P2O5 0.120 141.945 0.001 P2O5 0.055
B2O3 0.000 69.620 0.000 B2O3 0.000
SiO2 17.050 60.085 0.284 SiO2 18.413
TiO2 0.180 79.899 0.002 TiO2 0.146
FeO 0.000 0.000 0.000 TOTAL FLUX 1.000
MOLEC WEIGHT 6488.769 TOTAL ALK FLUX 0.464
L.O.I. 14.823 PERCENT Al2O3 to SiO2 = 1: 3.408
NAME Yellow Ochre FIRED IN OXIDATION
ELEMENT WEIGHT MOL WEIGHT MOL PARTS Al2O3 UNITY SEGER FORM
K2O 0.020 94.203 0.000 K2O 0.003
Na2O 0.430 61.979 0.007 Na2O 0.083
CaO 0.370 56.079 0.007 CaO 0.079
MgO 0.050 40.311 0.001 MgO 0.015
MnO 0.030 70.937 0.000 MnO 0.005
Li2O 0.000 29.877 0.000 Li2O 0.000
Fe2O3 73.260 159.690 0.459 Fe2O3 5.510
Al2O3 8.490 101.961 0.083 Al2O3 1.000
P2O5 0.120 141.945 0.001 P2O5 0.010
B2O3 0.000 69.620 0.000 B2O3 0.000
SiO2 17.050 60.085 0.284 SiO2 3.408
TiO2 0.180 79.899 0.002 TiO2 0.027
FeO 0.000 0.000 0.000 TOTAL FLUX 0.185
MOLEC WEIGHT 1200.954 TOTAL ALK FLUX 0.086
L.O.I. 14.823 PERCENT Al2O3 to SiO2 = 1: 3.408
Hope this helps,
Gary R Hill
E:mail ghil2@students.bendigo.latrobe.edu.au
tgschs10 on sat 9 oct 99
In Tom Coleman's Book on glazes, there are several recipies calling for
"yellow iron oxide"; what is it and can red iron oxide or black iron be
substituted?
Thanks
Tom Sawyer
Earl Brunner on sun 10 oct 99
Tom has only been using the yellow stuff for a couple of years, I remember
when he started using it in the studio. He gets it from Aardvark I think.
His glazes have been around longer than the yellow Iron, what kind of a
percentage change you might need,ing would be experimental on your part
probably. I know that he does prefer the yellow stuff and I don't think it
is just yellow ochre either.
tgschs10 wrote:
> ----------------------------Original message----------------------------
> In Tom Coleman's Book on glazes, there are several recipies calling for
> "yellow iron oxide"; what is it and can red iron oxide or black iron be
> substituted?
>
> Thanks
>
> Tom Sawyer
--
Earl Brunner
http://coyote.accessnv.com/bruec
mailto:bruec@anv.net
Joyce Lee on mon 11 oct 99
When I researched this back in November '96, I found that "yellow iron
oxide goes by the name yellow ochre and that it is a natural hydrated
iron oxide mixed in with some clay." Then again,
Hamers' says that yellow ochre is limonite, "a soft crumbly variety of
iron ore which sometimes contains some clay and limestone." The Hamers'
source doesn't even mention yellow iron oxide under the Types of Iron
Oxide sub-heading. A little later I read Hopper's definition of Iron
Oxide (Yellow) in Ceramic Spectrum and he says: "Fe2O3 ferric oxide. A
true iron oxide, ochre colored. The name is frequently misused to mean
yellow ochre." I later discovered that Seattle Pottery Supply (thanks,
Rafael) sold Yellow Iron Oxide labeled as such. This is what I
purchased; works fine in Coleman's blue celadon recipe. The blue celadon
occasionally crazes for me ... caused by yio?? Don't know and don't want
to research further.
Joyce
In the Mojave where a form of non-summer has arrived ... at least for a
few hours in the morning ... and the flickers are back pecking at the
one big ol' elm tree ... just above the "FLICKER SANCTUARY" sign son
gave me a couple of years ago... and shrilling above the studio door to
let me know they're here and to check out what's new.
CNW on mon 11 oct 99
I recently did a glaze test with : yellow iron ox, spanish red, crocus
martus and black iron ox. Much to my surprise the yellow iron ox came out
the brownest others were varying shades of burgundy. That was on a terra
cotta at 04.
We used some at school in terra sig, went on a white stoneware, in the kiln
yellow out of the kiln 04 baby pink.
In the past I've used it in glazes and gotten a nice yellow-tan at 04.
So in my puzzled opinion it ain't the same animal............most of the
time. I would guess that the impurities that alter the raw color also alter
the fired color, depending on the other glaze materials.
Celia
'Chapatsu' Rob Uechi on mon 11 oct 99
I think they are all the same, except that red and black are stronger than
yellow. If I remember correctly, 1 red = 5 yellow.
> > ----------------------------Original message----------------------------
> > In Tom Coleman's Book on glazes, there are several recipies calling for
> > "yellow iron oxide"; what is it and can red iron oxide or black iron be
> > substituted?
> >
> > Thanks
> >
> > Tom Sawyer
>
> --
> Earl Brunner
> http://coyote.accessnv.com/bruec
> mailto:bruec@anv.net
>
Donn Buchfinck on mon 11 oct 99
it is I think a refined form of yellow ocher that is bright in color not dull
yellow brown like the normal stuff we use in glazes like amber celedon.
I think you can get it from a place called
Ceramic color & chemical corp,
New Brighton PA.
ask for pure high grade yellow ocher
we used it in a glaze called cornell saturate iron
which looked just great on porcelain cone 10 reduction
but you need this special ocher for it to work
custer 43
silica 29
whiting 14
yellow ocher 14
if you take some yellow ocher and put it on a tile and use a torch on it, it
will turn red, yellow ocher is red iron oxide in a different form, I know I
am not getting the techical points right but there are the glaze gurus to
explain it better
good luck
Donn Buchfinck
San Francisco
Ho Say Leong on mon 11 oct 99
I 've tried only once with yellow iron oxide (which I bought from The
PotteryCraft, Stoke-on-Trent, UK), when raw it is Yellow-Orche color.
I added 5% into my clear glaze (fired to ^4), and the result is a very light
brown, similar 2% of red iron oxide in the same glaze.
I also added it into my white clay, when fire to ^04, it is almost the same
color as terracotta (warm Ornage-Red), and when is fired to ^4, it is a darker
color (Indian-Red color, just like the color of those bricks which people use
them to build houses).
W.S.Fong from Malaysia
I am a new mother who just gave birth of her baby girl 4 months ago.
Nina Jones on tue 12 oct 99
Hi, Tom,
Yellow iron oxide is a weaker version of red iron oxide; it's
hydrated and has a high clay content. It's a stronger version of
yellow ochre. I don't know in what proportion you could substitute
red iron oxide or yellow ochre in a recipe or what adjustments you
would need to make for the clay content of the yellow iron oxide. I'd
think you may need to post the recipe to the list so that some of our
recipe wizards could have a look at it
Nina D. Jones
Southside Chicago
@ njones@winston.com
>>> tgschs10 10/09/99 10:32PM >>>
----------------------------Original
message----------------------------
In Tom Coleman's Book on glazes, there are several recipies calling
for
"yellow iron oxide"; what is it and can red iron oxide or black iron
be
substituted?
Thanks
Tom Sawyer
Edouard Bastarache on tue 12 oct 99
------------------
Hello all,
an analysis i obtained 2 years ago from a ceramic supplies store in Montreal
says it contains:
1-Fe2o3 78.8=25
2-Sio2 10.8=25
3-Cao 10.4=25
So if you own a glaze program it is easy to work out
a substitution with red iron oxide and wollastonite,
which could give the following:
1-Fe2o3 78.4=25
2-Wollastonite 21.6=25
Later,
Edouard Bastarache
edouardb=40sorel-tracy.qc.ca
http://www.sorel-tracy.qc.ca/=7Eedouardb/
-----Message d'origine-----
De : CNW =3Ccwike=40conninc.com=3E
=C0 : CLAYART=40LSV.UKY.EDU =3CCLAYART=40LSV.UKY.EDU=3E
Date : 11 octobre, 1999 11:36
Objet : Re: Yellow Iron Oxide
=3E----------------------------Original message----------------------------
=3EI recently did a glaze test with : yellow iron ox, spanish red, crocus
=3Emartus and black iron ox. Much to my surprise the yellow iron ox came out
=3Ethe brownest others were varying shades of burgundy. That was on a terra
=3Ecotta at 04.
=3E
=3EWe used some at school in terra sig, went on a white stoneware, in the
kiln
=3Eyellow out of the kiln 04 baby pink.
=3E
=3EIn the past I've used it in glazes and gotten a nice yellow-tan at 04.
=3E
=3ESo in my puzzled opinion it ain't the same animal............most of the
=3Etime. I would guess that the impurities that alter the raw color also =
alter
=3Ethe fired color, depending on the other glaze materials.
=3E
=3ECelia
John Tilton on tue 12 oct 99
I recently ran some tests with red and yellow iron oxides in both
oxidation and reduction and, percent for percent, they were
indistinguishable ----- also undistinguishable, I'm afraid. They were
of the saturated iron variety.
John
--
John Tilton
16211 NW 88th Terrace
Alachua, Fl. 32615
904-462-3762
Web site: http://www.tiltonpottery.com
mailto:tilton@atlantic.net
Kathi LeSueur on tue 12 oct 99
My experience with yellow iron oxide is that it's color strength varies
greatly from batch to batch. If you are using a glaze wher consistancy of
color is important then I would suggest staying away from yellow iron oxide.
Kathi LeSueur
Ann Arbor, MI
Paul Lewing on tue 12 oct 99
My experience with yellow iron oxide is that it's a lot like a weak red
iron oxide. In many glazes an increased amount of YIO will give the same
result as a lesser amount of RIO. What that makes it really good for is
situations where you'd like just a little bit of iron, like a pale
celadon. It's easier to control the amount of iron if you use the
weaker yellow iron, and easier to get it to evenly disperse through your
glaze.
Paul Lewing, Seattle- off to North Dakota to do a workshop for a few
days.
I.Lewis on fri 15 oct 99
------------------
Dana gives Limonite as the name for yellow iron oxide, classes it as a =
Hydrated
ferric oxide HFeO2 under the mineral term of Goethite. Composition for those
with computer glaze predilections, Fe 62.9, O 27, H2O 10.1 as percentages.
Regards,
Ivor.
V. Rivhar on sat 13 nov 99
Tom,
Yellow iron may also be known as yellow ochre. I don't think it will get
the same results as the red iron, it will be different.
Vic
tgschs10 wrote:
> ----------------------------Original message----------------------------
> In Tom Coleman's Book on glazes, there are several recipies calling for
> "yellow iron oxide"; what is it and can red iron oxide or black iron be
> substituted?
>
> Thanks
>
> Tom Sawyer
ababy sharon on sun 14 nov 99
Hi!
Here in Israel until some years ago, the carpenters used it as a coloring
add, when
they oiled the frames of doors and window in order to protect them from the
climate influence.That why we could buy it only at hardware stores. Once by
mistake, I made glaze from 50 nepheline sienite and 50 gerstley borate. The
result, I don't think it is food safe as having crackles.You can add 5 ocher
and get clear yellow on white body at ^ 04, ^ 03. As the temperature, goes
up you start getting brown spots. I use this glaze now up to ^6 with an add
of 10 zircopax. on dark clay it is creamy brown.It is nice with other
colorants too.
NEPHELINE SYENITE 50
GERSTLEY BORATE 50
ZIRCOPAX 10
YELLOW OCHRE 5
(I think it should work in raku too).
I hope the gurus will help me to ajust this glaze.
Anyway this Iron is weaker than red iron.
If you have students you can show them "The magic engob" that turns from
yellow to red.
As for glazing, it is depend of course,what are other materials you have to
get yellow or red from these 5 parts of ocher.
Ababi
-----
Original Message ----- .
Rivhar
To:
Sent: Sunday, November 14, 1999 06:48
Subject: Re: Yellow Iron Oxide
> ----------------------------Original message----------------------------
> Tom,
>
> Yellow iron may also be known as yellow ochre. I don't think it will get
> the same results as the red iron, it will be different.
> Vic
>
> tgschs10 wrote:
>
> > ----------------------------Original message----------------------------
> > In Tom Coleman's Book on glazes, there are several recipies calling for
> > "yellow iron oxide"; what is it and can red iron oxide or black iron be
> > substituted?
> >
> > Thanks
> >
> > Tom Sawyer
>
Earl Brunner on mon 10 sep 01
Unless you order a very big bag of it......
KLeSueur@aol.com wrote:
> My experience is that yellow iron varies greatly in intensity from batch to
> batch. The first time I used it with cobalt in a blue glaze it was beautiful.
> When that batch ran out I ordered some more. The glaze was never the same as
> with that first batch. I tried several suppliers, never that beautiful blue.
> So if you need consistancy, I'd hesitate to use it.
>
> Kathi LeSueur
>
> ______________________________________________________________________________
> 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.
--
Earl Brunner
http://coyote.accessnv.com/bruec/
bruec@anv.net
Lorraine Pierce on mon 10 sep 01
Hi All...Where do you purchase your yellow iron oxide? I cannot find a
source in Florida, nor does my Highwater catalogue ( North Carolina)
mention it. I would like to try this non-staining iron I have been reading
about...good grief, no more iron stains?! Unbelievable! Lori Pierce in
New Port Richey, Fl.
KYancey on mon 10 sep 01
Lorraine Pierce wrote:
> Hi All...Where do you purchase your yellow iron oxide?
I purchased mine from St Petersburg Clay Company. Give them a call at 727-327-2815.
It will not be listed on their web site, but last I checked they had quite a bit.
www.stpeteclay.com/
Ken
KLeSueur@AOL.COM on mon 10 sep 01
My experience is that yellow iron varies greatly in intensity from batch to
batch. The first time I used it with cobalt in a blue glaze it was beautiful.
When that batch ran out I ordered some more. The glaze was never the same as
with that first batch. I tried several suppliers, never that beautiful blue.
So if you need consistancy, I'd hesitate to use it.
Kathi LeSueur
Gene Arnold on tue 25 sep 07
I found a celadon recipe that I would like to try but it calls for =
yellow iron oxide. I searched all my supplier catalogs that are in the =
studio and found no reference for yellow iron oxide. I even looked in =
Hammer pottery dictionary and only red and black iron were there. So I'm =
thinking yellow iron oxide is actually yellow ochre. Is this correct or =
is there really a yellow iron oxide out there some where???
Thanks!!!
Gene=20
mudduck@mudduckpottery.net
www.mudduckpottery.net
John Britt on tue 25 sep 07
You can get Yellow Iron Oxide at Standard Ceramics Supply:
http://www.standardceramic.com/materials.html
Hope it helps,
John Britt
www.johnbrittpottery.com
Dan Saultman on tue 25 sep 07
Gene,
Yellow iron oxide is not yellow ochre.
It is a very fine mustard yellow colored powder that is actually iron
oxide. Tom Coleman uses it in some of his glazes.
I buy mine through Standard Ceramic Supply, Pittsburgh, PA. Very good
service.
You can Google them to find them.
Dan
Dan Saultman
Fine-Art Pottery
Detroit
http://www.saultman.com
On Sep 25, 2007, at 6:14 PM, Gene Arnold wrote:
> I found a celadon recipe that I would like to try but it calls for
> yellow iron oxide. I searched all my supplier catalogs that are in the
> studio and found no reference for yellow iron oxide. I even looked in
> Hammer pottery dictionary and only red and black iron were there. So
> I'm thinking yellow iron oxide is actually yellow ochre. Is this
> correct or is there really a yellow iron oxide out there some where???
>
> Thanks!!!
> Gene
> mudduck@mudduckpottery.net
> www.mudduckpottery.net
>
> _______________________________________________________________________
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>
Edouard Bastarache Inc. on tue 25 sep 07
It is not yellow ochre, as far as I know,
it can be replaced by red iron oxide.
Gis la revido,
(A la revoyure)
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://perso.orange.fr/smart2000/livres.htm
http://www.pshcanada.com/Toxicology.htm
http://www.ceramique.com/librairie/
http://www.flickr.com/photos/30058682@N00/
http://myblogsmesblogs.blogspot.com/
( Arial) on wed 26 sep 07
I just bought both at HighwaterClay in Asheville,NC,Friday and they are
certainly different products.Tm Coleman uses it in many of his glazes.
Meg
************************************** See what's new at http://www.aol.com
Judy Smith on mon 5 dec 11
I found this glaze recipe on the web and the picture looks like a matte
buttery yellow. I don't have any yellow iron oxide. Can I substitute red
iron oxide or yellow ochre for the yellow iron oxide? If so, how much
would I use? I fire to cone 6 in oxidation.
40 Custer Feldspar
16 Whiting
9 Frit 3124
9 Talc
10 EPK
16 Silica
Add approx. 2% yellow iron oxide to get the yellow color
Thanks,
Judy Smith
Steve Mills on mon 5 dec 11
In my book yellow ochre and yellow iron oxide are one and the same.
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my Ipod touch
On 5 Dec 2011, at 14:42, Judy Smith wrote:
> I found this glaze recipe on the web and the picture looks like a matte
> buttery yellow. I don't have any yellow iron oxide. Can I substitute re=
d
> iron oxide or yellow ochre for the yellow iron oxide? If so, how much
> would I use? I fire to cone 6 in oxidation.
>
> 40 Custer Feldspar
> 16 Whiting
> 9 Frit 3124
> 9 Talc
> 10 EPK
> 16 Silica
> Add approx. 2% yellow iron oxide to get the yellow color
>
> Thanks,
> Judy Smith
KATHI LESUEUR on mon 5 dec 11
I used to use yellow iron in one of my glazes. It's a very weak source =3D
of iron, The problem I had was that it was very inconsistent from batch =3D
to batch so I could rely on it for my glazes if I want to a consistent =3D
look.
KATHI LESUEUR
http://www.lesueurclaywork.com
On Dec 5, 2011, at 9:42 AM, Judy Smith wrote:
> I found this glaze recipe on the web and the picture looks like a =3D
matte
> buttery yellow. I don't have any yellow iron oxide. Can I substitute =
=3D
red
> iron oxide or yellow ochre for the yellow iron oxide? If so, how much
> would I use? I fire to cone 6 in oxidation.
>=3D20
> 40 Custer Feldspar
> 16 Whiting
> 9 Frit 3124
> 9 Talc
> 10 EPK
> 16 Silica
> Add approx. 2% yellow iron oxide to get the yellow color
>=3D20
> Thanks,
> Judy Smith
>=3D20
Edouard Bastarache on mon 5 dec 11
Some information on the MSDS of a supplier :
http://www.naturalpigments.com/msds/msds_430-44.htm
Gis,
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://www.flickr.com/photos/30058682@N00/
http://edouardbastarache.blogspot.com/
http://edouardbastaracheblogs2.blogspot.com/
http://www.facebook.com/edouard.bastarache
John Britt on mon 5 dec 11
Here is an article I wrote for Ceramics Monthly March 2011 :
http://ceramicartsdaily.org/wp-content/uploads/2011/03/cmtechnofileiron.p=
=3D
df
It tells all about iron. Yellow ochre is weaker than synthetic yellow ir=
=3D
on,
Hope it helps,
John Britt Pottery
Steve Slatin on mon 5 dec 11
IIRC, yellow ochre is yellow iron oxide -- and both are hydrated iron oxide=
=3D
.=3D0AIn general, red iron oxide is about 95% Fe2O3, with the rest LOI, and=
y=3D
ellow=3D0Airon oxide is about 85% with the rest LOI, so the sub is easyand =
wi=3D
ll generally=3D0A(but not invariably) be successful -- to use red for yello=
w,=3D
it'd be 85/95 (89.5%)=3D0Aof the original amount, to use yellow for red it=
'd=3D
be 95/85 (112%).=3D0A=3DA0=3D0ABlack iron oxide is different, it's Fe3O4.=
=3D0A=3DA0=3D
=3D0A=3DA0=3D0ASteve Slatin -- =3D0A=3D0A=3D0AN48.0886450=3D0AW123.1420482=
=3D0A=3D0A=3D0A______=3D
__________________________=3D0AFrom: Judy Smith =3D0=
ATo:=3D
Clayart@LSV.CERAMICS.ORG =3D0ASent: Monday, December 5, 2011 8:42 AM=3D0AS=
ubje=3D
ct: yellow iron oxide=3D0A=3D0AI found this glaze recipe on the web and the=
pic=3D
ture looks like a matte=3D0Abuttery yellow.=3DA0 I don't have any yellow ir=
on o=3D
xide.=3DA0 Can I substitute red=3D0Airon oxide or yellow ochre for the yell=
ow i=3D
ron oxide?=3DA0 If so, how much=3D0Awould I use?=3DA0 I fire to cone 6 in o=
xidati=3D
on.=3D0A=3D0A40=3DA0 Custer Feldspar=3D0A16=3DA0 Whiting=3D0A9=3DA0 Frit 31=
24=3D0A9=3DA0 Talc=3D
=3D0A10=3DA0 EPK=3D0A16=3DA0 Silica=3D0AAdd approx. 2% yellow iron oxide to=
get the y=3D
ellow color=3D0A=3D0AThanks,=3D0AJudy Smith
Richard Aerni on mon 5 dec 11
Kathi LeSeur wrote:
I used to use yellow iron in one of my glazes. It's a very weak source =3D
of iron,
The problem I had was that it was very inconsistent from batch to batch =3D
so I
could rely on it for my glazes if I want to a consistent look.
I tend to use about twice as much as I would red iron oxide in glazes. =3D
It's pretty clayey, and tends to help suspend glazes. I get the German =3D
stuff, and it seems pretty consistant.
Richard Aerni
Rochester, NY...recovering after the best studio show ever...
John Britt on tue 6 dec 11
Don't let anyone tell you there is no difference between Yellow Ochre and=
=3D
=3D20
Yellow Iron.=3D20
I know this for two reasons. 1. I have empirically tested them and can se=
=3D
e the=3D20
weaker amount of iron in Yellow Ochre and 2. The suppliers have to post t=
=3D
he=3D20
MSDS on the website. (With potters there is confusion with yellow ochre,=3D=
20=3D
yellow iron and synthetic yellow iron. Pottery common wisdom doesn't alwa=
=3D
ys=3D20
keep up with new trends, but there is a difference.) Remember that materi=
=3D
als=3D20
constantly change so what I just said,...... may not be true tomorrow. Bu=
=3D
t....
All you have to do it is look at the MSDS sheet and it will tell you. (yo=
=3D
u can=3D20
easliy google it for your supplier.)
Here is Highwater's Yellow Ochre:
http://www.highwaterclays.com/index.cfm?
fuseaction=3D3Dfeature.display&feature_ID=3D3D198
Here is Standard Clay's:
http://www.standardceramic.com/MSDSmaterials/Ochre%20-%20Yellow.pdf
If you look at #3 you will see it has 3- - 40% ochre/15-25 % silica/1-5%=3D=
20=3D
alumina/1-5% manganese.
Standard Clay also sells synthetic yellow iron:
http://www.standardceramic.com/MSDSmaterials/Iron%20Oxide%20-
%20Yellow.pdf
You can see that is called Bayferrox 3910 - that is synthetic yellow iron=
=3D
and=3D20
about 95 - 99% pure. (Also called C.I. Pigment Yellow 42 FeOOH.)
Anything from Bayferrox (now known as Laxness ) is very pure.
Here is Laguna Ochre Yellow:
http://www.lagunaclay.com/msds/pdf/3rawmat/adry/mochre.pdf
Here is Laguna yellow iron:
http://www.lagunaclay.com/msds/pdf/3rawmat/adry/Iron_Oxide_Yellow.pdf
So check with your supplier and don't believe what the person on the phon=
=3D
e=3D20
says. Look on the MSDS and if they don't have one remind them that they=3D2=
0=3D
need to post it.
Hope it helps,
John Britt Pottery
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