Wendy Hampton on tue 6 aug 96
Does anyone know where I can get the chemical Crocus Martis. I learned about
it in a class by Pete Pinnell. Pete if you're listening - help!.
Thanks
Wendy from Seattle
Jeremy/Bonnie Hellman on wed 7 aug 96
Standard Ceramics in Pittsburgh, PA sells it for either $2 or $3 per pound
plus shipping. Bonnie (who has no financial or profesional affiliation with
Standard Ceramics but who thinks that they are good people with high
quality products.)
>----------------------------Original message----------------------------
>Does anyone know where I can get the chemical Crocus Martis. I learned about
>it in a class by Pete Pinnell. Pete if you're listening - help!.
>
>Thanks
>Wendy from Seattle
Mark Burleson on wed 7 aug 96
Hi Wendy from Seattle,
Highwater Clay in Asheville, NC has Crocus Martis. Phone # 704.252.6033.
Mark from Odyssey
Suzana Lisanti on mon 5 jan 98
I notice there is both a red and a yellow crocus martis - what's the
difference?
-Suzana Lisanti
in Cambridge where it is no longer pitch dark at 6:30 am
>----------------------------Original message----------------------------
>Dear Veronica: Don't bother applying Randy's Red thicker, it will just
>become a more dense tan color. But DO get the crocus martis -- YOU WON'T BE
>SORRY! An absolutely beautiful color!
>>
>>Randy's Red - good dark mahogany red, but not an interesting surface.
>>Although the glaze went on a bit thickly, it seemed to fire a bit thin. I
>>notice Barbara Lewis mentions using half crocus martis and half RIO, instead
>>of all RIO. I must get some and try it. But mainly, will have to try it
>>thicker to try to get depth and character.
>>
Cathy Mumford on tue 6 jan 98
Suzana Lisanti wrote:
>
> ----------------------------Original message----------------------------
> I notice there is both a red and a yellow crocus martis - what's the
> difference?
>
> -Suzana Lisanti
> in Cambridge where it is no longer pitch dark at 6:30 am
>
> >----------------------------Original message----------------------------
> >Dear Veronica: Don't bother applying Randy's Red thicker, it will just
> >become a more dense tan color. But DO get the crocus martis -- YOU WON'T BE
> >SORRY! An absolutely beautiful color!
>
>
>
> >>
> >>Randy's Red - good dark mahogany red, but not an interesting surface.
> >>Although the glaze went on a bit thickly, it seemed to fire a bit thin. I
> >>notice Barbara Lewis mentions using half crocus martis and half RIO, instead
> >>of all RIO. I must get some and try it. But mainly, will have to try it
> >>thicker to try to get depth and character.
> >>
My supplier does not carry crocus martis-can you advise where to order
it? Have seen several recipes for cone 6 glazes calling for it and
would love to give them a try. thx. cathy
Birdfoot on wed 7 jan 98
Suzana Lisanti wrote:
>
> ----------------------------Original message----------------------------
> I notice there is both a red and a yellow crocus martis - what's the
> difference?
>
> -Suzana Lisanti
> in Cambridge where it is no longer pitch dark at 6:30 am
>
> >----------------------------Original message----------------------------
> >Dear Veronica: Don't bother applying Randy's Red thicker, it will just
> >become a more dense tan color. But DO get the crocus martis -- YOU WON'T BE
> >SORRY! An absolutely beautiful color!
>
>
>
> >>
> >>Randy's Red - good dark mahogany red, but not an interesting surface.
> >>Although the glaze went on a bit thickly, it seemed to fire a bit thin. I
> >>notice Barbara Lewis mentions using half crocus martis and half RIO, instead
> >>of all RIO. I must get some and try it. But mainly, will have to try it
> >>thicker to try to get depth and character.
> >>
I am just learning about making glazes and am fascinated (and as yet a
little bewildered!) by all the minerals, chemicals and terminology.
What exactly IS crocus martis...what is its origin? What colors does it
lend to a glaze? And why are the prices for it so varied in the
catalogs? Is there a synthetic form of it? I Won't expose more of my
ignorance as yet, but this I got to know!
-Dale
in North Eastern NC where it is quite balmy, for the moment
Eydie DeVincenzi on thu 8 jan 98
------------------
Regarding crocus martis - red and yellow:
I do not know the difference, but I've been told that a company called
Cermaic Supply of NY and NJ sells both. I just found a local (Virginia)
company that sells crocus in 1/4 oz sizes. I plan to experiment with it as
a color in my clay. I was using RIO crocus to get a lovely wine red color
in my clay when fired at cone 6.
Eydie DeVincenzi
Stephen Mills on thu 8 jan 98
Cathy,
In the UK we are now advised that natural Crocus Martis (Purple Iron
Oxide) is unobtainable, (either because of politics, or the known seams
have dried up no-one seems to know for certain) the only stuff we can
get now is synthetic, it seems OK.
Steve
Bath
UK
In message , Cathy Mumford writes
>----------------------------Original message----------------------------
>Suzana Lisanti wrote:
>>
>> ----------------------------Original message----------------------------
>> I notice there is both a red and a yellow crocus martis - what's the
>> difference?
>>
>> -Suzana Lisanti
>> in Cambridge where it is no longer pitch dark at 6:30 am
>>
>> >----------------------------Original message----------------------------
>> >Dear Veronica: Don't bother applying Randy's Red thicker, it will just
>> >become a more dense tan color. But DO get the crocus martis -- YOU WON'T BE
>> >SORRY! An absolutely beautiful color!
>>
>>
>>
>> >>
>> >>Randy's Red - good dark mahogany red, but not an interesting surface.
>> >>Although the glaze went on a bit thickly, it seemed to fire a bit thin. I
>> >>notice Barbara Lewis mentions using half crocus martis and half RIO, instea
>> >>of all RIO. I must get some and try it. But mainly, will have to try it
>> >>thicker to try to get depth and character.
>> >>
>My supplier does not carry crocus martis-can you advise where to order
>it? Have seen several recipes for cone 6 glazes calling for it and
>would love to give them a try. thx. cathy
>
--
Steve Mills
Bath
UK
home e-mail: stevemills@mudslinger.demon.co.uk
work e-mail: stevemills@bathpotters.demon.co.uk
Tom Buck on thu 22 jan 98
Paul Lewing: Crocus Martis originally was a natrual-occurring iron III
oxide (red), perhaps a tad hydrated, mixed with a lesser amount of clayey
materials, which would alter its colour. Today, Crocus Martis sold by
suppliers is likely to be synthetic red iron oxide, but a relatively
impure grade.
Iron Oxide Red from Spain usually is bright crimson, signalling
its high purity, so I suspect you were given N.American synthetic iron
oxide red produced by one of several plants, and each plant produces a
somewhat different RIO in terms of purity level.
BFN. Tom.
Tom Buck ) tel: 905-389-2339
& snailmail: 373 East 43rd St. Hamilton ON L8T 3E1 Canada
(westend Lake Ontario, province of Ontario, Canada).
Dana Henson on fri 27 mar 98
Could someone please tell me what the differences are between the red iron
oxides and crocus martis? I've seen recipes where it has been suggested that
one can substitute crocus martis for red iron. Why? What is the difference?
Thanks in advance...
Dana Henson
in Pilot Point, Texas
joelpot on sat 28 mar 98
This query has appeared before on
clayart. Maybe it should be set up in the FAQ's.
Crocus martis is an iron oxide pigment which is made by calcining Ferrous
Sulfate. It is probably a mix of several iron oxides. The main commercial
uses are for mineral pigments and for fine polishing of metals & glass.
IMOH, it is probably an expensive substitute for the potter's Iron Oxide.
Joseph V. Kelly
193 Waldoboro Road
Bremen ME 04551
-----Original Message-----
From: Dana Henson
To: Multiple recipients of list CLAYART
Date: Friday, March 27, 1998 8:49 AM
Subject: Crocus Martis
----------------------------Original message----------------------------
Could someone please tell me what the differences are between the red iron
oxides and crocus martis? I've seen recipes where it has been suggested
that
one can substitute crocus martis for red iron. Why? What is the
difference?
Thanks in advance...
Dana Henson
in Pilot Point, Texas
DONPREY on sat 28 mar 98
Dana,
go to the following site and look under "materials, misc":
http://www.potters.org/categories.htm
Don Prey in Oregon
Stephen Mills on sat 28 mar 98
At stoneware temperatures there appears to be little difference in
effect I have subbed one for the other in the past without.
Check Hamer & Hamer for the chemical breakdown.
Steve
Bath
UK
In message , Dana Henson writes
>----------------------------Original message----------------------------
>Could someone please tell me what the differences are between the red iron
>oxides and crocus martis? I've seen recipes where it has been suggested that
>one can substitute crocus martis for red iron. Why? What is the difference?
>Thanks in advance...
>Dana Henson
>in Pilot Point, Texas
>
--
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
PamWitch on sun 29 mar 98
I recently saw white stoneware fired (oxidation) with slips made from red iron
oxide and crocus martis. Both were glaze fired with black glaze over the
slip, but with areas waxed out to reveal the naked slip. The crocus martis
appeared cooler or slightly "bluer" in color compared to the slightly warmer
tone of the red iron. Side by side, the difference was noticeable. I wonder
if I would know the difference separately. The color differentiation was
similar in the powder form.
Pam
Llewellyn Kouba on mon 25 feb 02
These are the differing Chemical names associated with crocus: old and
modern as provided by Donald Haarmann
Crocus ......Ferric oxide Fe2O3
Crocus martis..... Ferric hydroxide
Crocus martis adstringens ......Ferric oxide Fe2O3
Crocus of antimony..... Antimony sulphide
Crocus powder..... Ferric oxide Fe2O3
Llewellyn
Kat Fode on tue 26 feb 02
Crocus Martis has historically been a simple natural-occuring
red iron oxide containing impurities (clay minerals) Today it is more
likely to be a synthetic impure red iron oxide.
You may have known all this already and I am not sure where you
can get the stuff. Does it react differently than iron oxide?
Kat
kat@digitalfire.com
Judith Frederick on thu 28 feb 02
When I add crocus martis to a clear glaze recipe for ^10 reduction igot a
pretty royal blue, not anything like when i added red iron oxide to the
clear, which was more of a brown color.
I was just playing around in the oxides and don't know much, but added
different oxides to the same base clear glaze.
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Judith Frederick on thu 28 feb 02
DISREGUARD MY LAST POST
My last post about the royal blue my mistake that was cobolt carbonate
SOOOOOO SORRY.
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Pat Hight on fri 1 mar 02
Where can I get crocus martis? It looks great as a terra sig colorant, but I
can't find any, and neither can my clay supplier.
Thanks,
Pat Hight
Cindy Gatto on sat 2 mar 02
Hi Pat:
Contact Ceramic Supply Of New York and New Jersey P{hone number
800-723-7264 address: 7 Route 46 west, Lodi, NJ 07644, Web site:
www.7ceramic.com, They have Crocus Martis Red and Yellow for $4.70 a pound.
We looked it up in there catalog they definitely have it. Good luck.
Sincerely:
Mark Petrin & Cindy Gatto
The Mudpit
228 Manhattan Ave.
Brooklyn NY 11206
718-218-9424
mudpitnyc@aol.com
www.mudpitnyc.com
Jennifer Firestone on sat 2 mar 02
Pat,
I just got some from Standard Clay in Pittsburg.
412-276-6333
great in TS....1 tbsp in 1 cup = deep rich burgundy,
use less or add some cobalt for purples.
best regards,
Jennifer
www.FireKitten.com
----- Original Message -----
From: "Pat Hight"
Sent: Friday, March 01, 2002 10:57 PM
Subject: crocus martis
> Where can I get crocus martis? It looks great as a terra sig colorant, but
I
> can't find any, and neither can my clay supplier.
> Thanks,
> Pat Hight
>
L. P. Skeen on sat 2 mar 02
I believe Campbell Ceramic SUpply has some; I was just talking to Coy about
it yesterday. 336-578-9011 is the phone number. Coy will not be there today
but Sara is there.
L
----- Original Message -----
From: "Pat Hight"
To:
Sent: Friday, March 01, 2002 11:57 PM
Subject: crocus martis
> Where can I get crocus martis? It looks great as a terra sig colorant, but
I
> can't find any, and neither can my clay supplier.
> Thanks,
> Pat Hight
>
>
____________________________________________________________________________
__
> 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.
>
Susan Setley on mon 20 oct 03
I have found a local supplier for this form of iron oxide.
Any suggestions on its use, in glazes or other colorant forms, with either
cone 10 gas firing or Raku firing -- including the recipes -- would be most
welcome!
Susan (the other Susan -- smile)
Stephani Stephenson on tue 21 oct 03
Susan
I use 8-10 per cent Crocus martis in a cone 04-02 glaze. it
makes a lovely gold, and beautiful olive- moss greens in
combination with some copper/chrome stains, You can sub for
RIO in a glaze or even usw CM in slightly higher amounts in
your tests. I would start out with button tests and some
simple line blends, alnogside similar blends with RIO (Red
iron oxide) to see the difference in the two materials,
Stephani Stephenson
steph@alchemiestudio.com
Stephani Stephenson on tue 21 oct 03
I have been buying crocus martis from 'Seattle Pottery
Supply". it is a dusty mauve red color. When I ordered some
recently , SPSnotified me that they wanted to sub another
material for it . They wanted to sub a powder derived from
an ' impure iron ore', (i.e it is red iron oxide with a
lot of the accompanying ore ingredients . a 'dirty' RIO if
you will...) or.
I oredered some anyway and it is exactly the same color as
the 'crocus martis' I had ordered from them 3 years ago and
9 years ago.
Since this material seems to be less refined than RIO, it
wil probably vary over time, yet my samples from different
batches were quite alike
I use this ingredient in one glaze , in which substitutions
of purer RIO or other iron bearing stains or clays simply
don't have the same effect. So those ' impurities' , or
other trace ingredients are desireable in this case,
Rhodes defines 'crocus martis' as an 'impure iron
oxide'...It may be that other suppliers sell a similar
material but under a different name,
Stephani Stephenson
steph@alchemiestudio.com
http://www.alchemiestudio.com
Sandra Talarico on tue 21 oct 03
Susan,
I learned how Pete Pinnell uses crocus martis in a workshop of his
earlier this year.
He uses it as an oxide wash. 50% crocus martis 50% neph sye.
in cone 6 electric it's a nice dark, purple-like brown.
I have just started using this on some white clay where the surface
of the pot has been textured. I really like it.
I bought my supply at Ceramic Supply of Lodi, New Jersey.
Sandy Talarico
Kenneth D. Westfall on tue 21 oct 03
makes a wonderful earthy purple when mixed in a white Tera sig.
At 12:15 PM 10/20/2003 -0400, you wrote:
>I have found a local supplier for this form of iron oxide.
>
>Any suggestions on its use, in glazes or other colorant forms, with either
>cone 10 gas firing or Raku firing -- including the recipes -- would be most
>welcome!
>
>Susan (the other Susan -- smile)
>
>______________________________________________________________________________
>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.
Kenneth D. Westfall
Pine Hill Pottery
R.D. #2 Box 6AA
Harrisville, WV 26362
kenneth@pinehillpottery.com
http://www.pinehillpottery.com
Susan Setley on mon 1 mar 04
I finally got my Crocus Martis iron oxide. It has a clearly purplish tint to
it.
I put it in some terra sig and painted a piece with it, and then took digital
pictures, one with flash and one without. The flash picked up ... PINK...
really, really, PINK, and I thought oh dear what have I done, because I really
like the piece. That piece had been made of Vegas buff.
The assistant studio manager had some bisqued test tiles made of a buff
stoneware, so we dipped the tile in it and high fired it. Well, it's really
gorgeous. It's a lovely, toasty, warm brown, and probably because of the terra sig,
looks like a more finished surface than if it had just been brushed on in a
water suspension. On porcelain the purple tendencies were still there, but with
warm brown undertones.
We're going to do some more systematic tests with it, including in the soda
kiln, and try it mixed with Spanish red iron oxide.As I have time I'm going to
try replacing the red iron oxide in a couple of glazes with it, including some
Raku glazes.
I also wedged it, incompletely, into some porcelain clay. That gave the piece
a lovelly swirl, but the swirl is purply-pink and I am praying it browns up
in firing so it's not quite so ... cute. :)
It seems to cause the particles in the terra sig to precipitate out, but that
could be the effect of some impurity in the crocus martis. I have no chemical
analysis of it.
Susan
firedup on sat 2 apr 05
anyone know where I can get about 1/2 pound of crocus martis iron oxide =
in Canada?
thanks
bev=20
Jeannean on sun 4 oct 09
Just read Pete Pinnell's article about tomato reds in Clay Times. Just =3D
wanted everyone to know I ordered some of those crocus martises and will =
=3D
post photos of them when they bloom next spring.=3D20
Jeannean
Spider Hole Pottery
Astoria, Oregon
.... with tongue firmly planted in cheek....
Steve Slatin on tue 6 oct 09
Croci Marti? I always have trouble
with adjectival agreement, I'm not
at all sure ...
Steve Slatin --
"semper est profundis hic."
--- On Mon, 10/5/09, Steve Mills wrote:
>> Surely the plural of Crocus Martis is
> Crocus Marti (phonetic: Croak-us Mart-eye).
>
> Steve
> Bath
> UK
>
> Semper in excreta
> Profundis variat solum!
>
>
>
>
> ________________________________
> From: Jeannean
> To: Clayart@LSV.CERAMICS.ORG
> Sent: Monday, October 5, 2009 3:25:07 AM
> Subject: Crocus martis
>
> Just read Pete Pinnell's article about tomato reds in Clay
> Times. Just wanted everyone to know I ordered some of those
> crocus martises and will post photos of them when they bloom
> next spring.
>
> Jeannean
> Spider Hole Pottery
> Astoria, Oregon
> .... with tongue firmly planted in cheek....
>
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Lili Krakowski on sat 21 aug 10
When I recalculated Randy McCall's recipe I left the colorants out. So =
=3D
the addition of crocus martis was his in the original.
I love crocus martis for several reasons. It has a lovely name. Its =3D
scientific name "copperas" is lovely. And then because is (supposedly) =3D
is a natural unrefined product full of endearing "impurities"--it gives =3D
interesting color effects. Is it in her Floating Blue--maybe yes, maybe =
=3D
no--but Sarah Bodine uses it in her version of a very popular glaze.
If whoever is unfamiliar with it...worth buying some and trying in iron =3D
rich glazes.
Lili Krakowski
Be of good courage
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