Carole Fox on mon 16 may 05
Once in a while I get a strange surprise when doing horsehair raku. The
image will be white instead of black. I had it happen once with the
horsehair and a few times when using dried plant material. The image will
appear as white against a smoky background.
A customer asked me how I did this and honestly, I didn't know what to say.
Can somebody tell me?
Thanks.
Carole Fox
Silver Fox Pottery
Elkton, MD
thesilverfox@dol.net
Angela Davis on mon 16 may 05
This happens to me when the temp of the pulled pot is
too high. I get the blackest marks from 1200 to 1000 F.
Hotter than that and the hair initially makes a dark carbon mark
which continues to burn out to light gray.
I will usually test a hair against the pot and if it vaporizes too quickly
I know to wait a bit and try again. Of course if you are after the
light markings go ahead and work.
Angela Davis
Working beside the beautiful Homosassa River.
----- Original Message -----
From: "Carole Fox"
To:
Sent: Monday, May 16, 2005 10:00 AM
Subject: horsehair raku surprise
> Once in a while I get a strange surprise when doing horsehair raku. The
> image will be white instead of black. I had it happen once with the
> horsehair and a few times when using dried plant material. The image will
> appear as white against a smoky background.
>
> A customer asked me how I did this and honestly, I didn't know what to
> say.
> Can somebody tell me?
> Thanks.
> Carole Fox
> Silver Fox Pottery
> Elkton, MD
> thesilverfox@dol.net
>
> ______________________________________________________________________________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
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> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
dannon rhudy on mon 16 may 05
> Once in a while ...a .... surprise when doing horsehair raku. The image
will be white instead of black.....
That sounds like your pot/piece/object was not quite
hot enough to carbonize your horsehair/fern/whatever,
but hot enough to absorb what small amount of smoke
was sent off by same object. So, a hazy/smoky look
to the surrounding area, and the covered part still
essentially white. I've seen it various times myself,
and even recall an image or two in CM or somewhere.
regards
Dannon Rhudy
Bruce Girrell on mon 16 may 05
I have had this happen. I would say that your pot was too hot. The hair
burned completely. Additional air can help oxidize the hair also.
We do it (intentionally) in a different way and call it the ghosting effect.
Bruce "looks like he's seen a ghost" Girrell
----- Original Message -----
From: "Carole Fox"
To:
Sent: Monday, May 16, 2005 10:00 AM
Subject: horsehair raku surprise
> Once in a while I get a strange surprise when doing horsehair raku. The
> image will be white instead of black. I had it happen once with the
> horsehair and a few times when using dried plant material. The image will
> appear as white against a smoky background.
>
> A customer asked me how I did this and honestly, I didn't know what to
say.
> Can somebody tell me?
> Thanks.
> Carole Fox
> Silver Fox Pottery
> Elkton, MD
> thesilverfox@dol.net
>
>
____________________________________________________________________________
__
> 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 on mon 16 may 05
Well there you have it, some say it's too cold, and some say it's too hot.
Earl Brunner
Las Vegas, NV
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Bruce Girrell
Sent: Monday, May 16, 2005 4:36 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: horsehair raku surprise
I have had this happen. I would say that your pot was too hot. The hair
burned completely. Additional air can help oxidize the hair also.
We do it (intentionally) in a different way and call it the ghosting effect.
Bruce "looks like he's seen a ghost" Girrell
----- Original Message -----
Carole Fox on tue 17 may 05
Hmmmm...now I will have to experiment to see if I can do this on purpose. It
is kind of cool looking, especially with the dark markings on the pot as a
nice contrast. I will go with the "too hot " theory for now. Bruce "looks
like he's seen a ghost" Girrell seems to really know his stuff when it comes
to horsehair and what he says makes sense.
I will not be firing horsehair pots for a while as I am working on other
things now, but, when I do get around to it (where does one get that round
tuit?), I will let you all know if I discover anything worth mentioning.
Thanks everyone.
xo,
Carole
Carole Fox
Silver Fox Pottery
Elkton, MD
thesilverfox@dol.net
----- Original Message -----
From: "Earl Brunner"
To:
Sent: Monday, May 16, 2005 7:49 PM
Subject: Re: horsehair raku surprise
> Well there you have it, some say it's too cold, and some say it's too hot.
>
> Earl Brunner
Bruce Girrell on tue 17 may 05
> After spraying sometimes I will place the pot back into the kiln and burn
> the carbon off where the hair was placed. This will leave white lines
> through out the orange from the ferric chloride.
Dang it! I thought that we were the only ones who did that.
Lynne and Bruce
Marcia Selsor on tue 17 may 05
Hi Carole,
I have gotten the negative images when I refire trying to erase them
and fire again. Then I have postive and negative on the same piece.
So I think it may be too hot for the negative images you are getting.
They are interesting though.
Marcia Selsor
On May 17, 2005, at 6:15 AM, Carole Fox wrote:
> Hmmmm...now I will have to experiment to see if I can do this on
> purpose. It
> is kind of cool looking, especially with the dark markings on the
> pot as a
> nice contrast. I will go with the "too hot " theory for now. Bruce
> "looks
> like he's seen a ghost" Girrell seems to really know his stuff when
> it comes
> to horsehair and what he says makes sense.
>
> I will not be firing horsehair pots for a while as I am working on
> other
> things now, but, when I do get around to it (where does one get
> that round
> tuit?), I will let you all know if I discover anything worth
> mentioning.
> Thanks everyone.
> xo,
> Carole
>
> Carole Fox
> Silver Fox Pottery
> Elkton, MD
> thesilverfox@dol.net
bonnie staffel on tue 17 may 05
Dear Carole,
I have also gotten this effect. My take on this reaction is the timing and
temperature of the clay body when you apply the horse hair. The hair is
acting as a resist to the smoke rather than leaving its ash/carbon. I would
think that the temperature could be at a hotter stage but if you understand
the happenstance of the burning, try the hair when you know the pot is very
hot and again when it is not. There are so many different ways of doing
this type of firing you need to do it often and keep notes. I did mine in
an electric kiln, watching the pyrometer to when it got to 1000 deg, opening
the lid and adding the horse hair. At least I could regulate it by
temperature. If you do it in a cooling pit fire or a raku kiln, you need to
make your own testing arrangements.
There are so many happenings in the methods of firing pots that I take the
Wabi Sabi attitude of enjoying the gift of the fire. My biggest pleasure
right now is the pit fire.
Regards,
Bonnie Staffel
http://webpages.charter.net/bstaffel/
http://vasefinder.com/bstaffelgallery1.html
Charter Member Potters Council
Gene Arnold on tue 17 may 05
I spray my horse hair pots with ferric chloride.(dangerous stuff be careful
if you choose to use it)
After spraying sometimes I will place the pot back into the kiln and burn
the carbon off where the hair was placed. This will leave white lines
through out the orange from the ferric chloride. Not exactly what you asked
but something a little different.
Gene & Latonna
mudduck@mudduckpottery.com
www.mudduckpottery.com
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