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food safe stain for white stoneware

updated wed 4 jun 08

 

Susan Fox Hirschmann on sun 1 jun 08


In a message dated 6/1/2008 9:54:54 PM Eastern Daylight Time,
blisspots@GCI.NET writes:

susan, i don't do ^6, but on the feet of my white claybody, i often
just brush some rutile with water on, it stains the body, doesn't
run and i don't have to look at garish white that clashes with the
glaze
btw if you do this in a lid gallery, you might want to add a little
alumina to the wash just to keep the lid from sticking
good luck
bliss

My major concern here is using something like rutile on a ^6 already fired
claybody, will cause some harm/ as far as food contact. In other words, these
cassaroles have already been fired and came out GORGEOUS with that glazing
exception! How can I put rutile on after the firing?

I have been doing some research and know that neighbor once had a black
walnut tree and the skin on those things causes a brown stain that is basically
unremovable. It is used in herbal remedies and I am thinking maybe this is a
good fix for this issue. What do you think?

Thanks for writing.
Susan



**************Get trade secrets for amazing burgers. Watch "Cooking with
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Joseph Herbert on sun 1 jun 08


Susan,

You can select a lower fire glaze, food safe, color of your choice, and
re-fire to a lower temperature. this will cover the white and, hopefully,
not change the result of the higher firing. this is safer if the original
and subsequent firings are in Oxidation. I doubt that unfired stains of any
kind will be satisfactory, long term. Aside from the food safety issues,
people tend to put food containers in the dish washer and few stains can
resist a few passes there.

Joe

-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG]On Behalf Of Susan Fox
Hirschmann
Sent: Sunday, June 01, 2008 8:49 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: food safe stain for white stoneware


In a message dated 6/1/2008 9:54:54 PM Eastern Daylight Time,
blisspots@GCI.NET writes:

susan, i don't do ^6, but on the feet of my white claybody, i often
just brush some rutile with water on, it stains the body, doesn't
run and i don't have to look at garish white that clashes with the
glaze
btw if you do this in a lid gallery, you might want to add a little
alumina to the wash just to keep the lid from sticking
good luck
bliss

My major concern here is using something like rutile on a ^6 already fired
claybody, will cause some harm/ as far as food contact. In other words,
these
cassaroles have already been fired and came out GORGEOUS with that glazing
exception! How can I put rutile on after the firing?

I have been doing some research and know that neighbor once had a black
walnut tree and the skin on those things causes a brown stain that is
basically
unremovable. It is used in herbal remedies and I am thinking maybe this is
a
good fix for this issue. What do you think?

Thanks for writing.
Susan



**************Get trade secrets for amazing burgers. Watch "Cooking with
Tyler Florence" on AOL Food.
(http://food.aol.com/tyler-florence?video=4&?NCID=aolfod00030000000002)
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Kris Bliss on sun 1 jun 08


susan, i don't do ^6, but on the feet of my white claybody, i often
just brush some rutile with water on, it stains the body, doesn't
run and i don't have to look at garish white that clashes with the
glaze
btw if you do this in a lid gallery, you might want to add a little
alumina to the wash just to keep the lid from sticking
good luck
bliss




**************Get trade secrets for amazing burgers. Watch "Cooking with
Tyler Florence" on AOL Food.
(http://food.aol.com/tyler-florence?video=4&?NCID=aolfod00030000000002)


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12:25 PM

Kris Bliss on mon 2 jun 08


shoot didn't realise already fired.
i have used several permanent stains on pots (mostly feet)
i think the walnut stain is perfect!
kris

-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG]On Behalf Of Susan Fox
Hirschmann
Sent: Sunday, June 01, 2008 6:49 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: food safe stain for white stoneware


In a message dated 6/1/2008 9:54:54 PM Eastern Daylight Time,
blisspots@GCI.NET writes:

susan, i don't do ^6, but on the feet of my white claybody, i often
just brush some rutile with water on, it stains the body, doesn't
run and i don't have to look at garish white that clashes with the
glaze
btw if you do this in a lid gallery, you might want to add a little
alumina to the wash just to keep the lid from sticking
good luck
bliss

My major concern here is using something like rutile on a ^6 already fired
claybody, will cause some harm/ as far as food contact. In other words,
these
cassaroles have already been fired and came out GORGEOUS with that glazing
exception! How can I put rutile on after the firing?

I have been doing some research and know that neighbor once had a black
walnut tree and the skin on those things causes a brown stain that is
basically
unremovable. It is used in herbal remedies and I am thinking maybe this is
a
good fix for this issue. What do you think?

Thanks for writing.
Susan



**************Get trade secrets for amazing burgers. Watch "Cooking with
Tyler Florence" on AOL Food.
(http://food.aol.com/tyler-florence?video=4&?NCID=aolfod00030000000002)


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7:12 AM

David Woof on mon 2 jun 08


sally, try red iron oxide wiped on bisque and excess wipped off. I do tho=
se glareing white foot rings up to the botton glaze line as well. I do it =
as an under stain before glazing. the over lap can cause a subtle but nice=
effect, sometimes halo effect, at the glaze line.
=20
i make no food safe claim as i am neither a scientific researcher with cred=
entials nor a health care professional. However i am almost as old as go=
d, can still dance all night and eat with bare hands.
=20
david =20
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Give to a good cause with every e-mail. Join the i=92m Initiative from Micr=
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Kim Hohlmayer on mon 2 jun 08


Hi there,
Just got back in town and am clearing my way through over 400 emails so I haven't read the responses you have already on this. If I repeat what you already have, forgive me. When I have that problem I use iron oxide. I can't think of anything safer. However, to keep the lid from sticking (iron is a fluxing agent) apply alumina hydrate to the lid and body surfaces that touch each other. Some people add the alumina hydrate to a little wax(latex) resist others just suspend it in water and apply it that way. Good luck. --Kim H.

Vince Pitelka on tue 3 jun 08


I have been traveling and have missed much of this thread, but do I
understand correctly that the original poster is asking about a stain tha=
t
can be applied after firing? If so, then there is no such thing as a
food-safe stain. No post-firing products (other than handles on teapots
and other such mixed-media additions) should ever be used on food-contact
wares. It simply is not appropriate, because when the wares are heated i=
n
oven or microwave, those post-firing products can turn into all sorts of
nasty toxic byproducts. I know that some people suggested low-fire cures=
,
and that is probably the best idea. Also, in my article on terra
sigillata at http://iweb.tntech.edu/wpitelka/professional/terra_sig.htm
there is information about using a terra sig made from the base claybody
to coat feet or lid seats in order to get a smoother surface, but that
must be done before the bisque-firing.
Good luck -
- Vince

Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka