Randall Moody on thu 23 sep 10
Does anyone have a recipe for the blue Jasperware? I was thinking of simply
using a porcelain body with a blue stain but would like to use the real
recipe if possible.
--
Randall in Atlanta
http://wrandallmoody.com
Jeff Jeff on fri 24 sep 10
Randall, Vince,
Last year I was trying to achieve a browner stoneware casting body so I
tested the addition of several iron ores: rutile, ochre, and iron oxide.
Feeling really daring I decided to add some to a batch of porcelain slip I=
had
sitting around. To my surprise, one of them, I forget which, turned the
white porcelain body into a slightly muddy purplish porcelain body. I wond=
er
if Josiah maybe added a little iron along with the cobalt?
take care
Jeff Longtin
Minneapolis
In a message dated 9/24/2010 9:54:41 P.M. Central Daylight Time,
vpitelka@DTCCOM.NET writes:
Randall Moody wrote:
"Does anyone have a recipe for the blue Jasperware? I was thinking of
simply
using a porcelain body with a blue stain but would like to use the real
recipe if possible."
Randall -
I don't think there is a "real" recipe. I have no idea what Wedgewood use=
d
in the original Jasperware, but it is obviously a porcelain or whiteware
with a little cobalt or blue stain added. How much cobalt or blue stain
will determine the desired shade of blue, and of course that is up to you
to
figure out, through experimentation, which will be easy and fun. The blue
Jasperware I am familiar with ranges from very light to medium blue, and I
would suggest 1/2% to 2% cobalt. If you use blue stain you are on your
own.
Good luck, and of course let us know what happens.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka
Vince Pitelka on fri 24 sep 10
Randall Moody wrote:
"Does anyone have a recipe for the blue Jasperware? I was thinking of simpl=
y
using a porcelain body with a blue stain but would like to use the real
recipe if possible."
Randall -
I don't think there is a "real" recipe. I have no idea what Wedgewood used
in the original Jasperware, but it is obviously a porcelain or whiteware
with a little cobalt or blue stain added. How much cobalt or blue stain
will determine the desired shade of blue, and of course that is up to you t=
o
figure out, through experimentation, which will be easy and fun. The blue
Jasperware I am familiar with ranges from very light to medium blue, and I
would suggest 1/2% to 2% cobalt. If you use blue stain you are on your own=
.
Good luck, and of course let us know what happens.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka
monkeymind88@COMCAST.NET on fri 24 sep 10
>Does anyone have a recipe for the blue Jasperware? I was thinking of simpl=
y
>using a porcelain body with a blue stain but would like to use the real
>recipe if possible.
>
>--
>Randall in Atlanta
>http://wrandallmoody.com
Hi, Randall,
I would imagine that formula is as guarded as the one for Coca Cola.
You can come pretty close to the color by adding stain to porcelain.
See a bead experiment with pate sur pate on my website (#1 listed
below)
--
Jeanette Harris in Poulsbo WA
http://www.jeanetteharrisblog.blogspot.com
http://fiberneedlethread.blogspot.com/
http://www.washingtonpotters.org/WPA_Gallery.htm
Randall Moody on sat 25 sep 10
I found this entry in "Science and Civilisation in China Vol. 5 concerning
Jasperware.
"The basis of Wedgewood's Jasperware was the newly discovered element bariu=
m
introduced into the body recipe in the form of barium sulphate." ... "The
unglazed Jasper porcelain was coloured variously with oxides of cobalt,
manganese, chrome, and iron, to give blue, pink, green and yellow
biscuit-wares respectively."
Let the freak out concerning barium begin. :)
On Fri, Sep 24, 2010 at 3:17 PM, wrote:
> Does anyone have a recipe for the blue Jasperware? I was thinking of simp=
ly
>> using a porcelain body with a blue stain but would like to use the real
>> recipe if possible.
>>
>> --
>> Randall in Atlanta
>> http://wrandallmoody.com
>>
>
> Hi, Randall,
>
> I would imagine that formula is as guarded as the one for Coca Cola.
> You can come pretty close to the color by adding stain to porcelain.
> See a bead experiment with pate sur pate on my website (#1 listed
> below)
> --
> Jeanette Harris in Poulsbo WA
>
> http://www.jeanetteharrisblog.blogspot.com
>
> http://fiberneedlethread.blogspot.com/
>
> http://www.washingtonpotters.org/WPA_Gallery.htm
>
--
Randall in Atlanta
http://wrandallmoody.com
Lee Love on sat 25 sep 10
I used a black clay body in Mashiko. I brought a soft sample with
me when I moved back. I used Continental B-Clay and wedged a black
mason stain until the clay was the same color as my sample. I glazed
it with nuka white and also my shino. At the link below, you can see
an example that was sold during my 55 matcha jawan for my 55th
birthday show I did for the McKnight:
http://picasaweb.google.com/lh/photo/YoOuXUCyQF0ivHYuJM_nkA?feat=3D3Ddirect=
li=3D
nk
I also throw it combined with straight B-clay and get a spiral effect.
--
=3DA0Lee, a Mashiko potter in Minneapolis
http://mingeisota.blogspot.com/
=3D93Observe the wonders as they occur around you. Don't claim them. Feel
the artistry moving through and be silent.=3D94 --Rumi
Randall Moody on sat 25 sep 10
On Sat, Sep 25, 2010 at 8:08 PM, Vince Pitelka wrote:
> Randall Moody wrote:
> "Let the freak out concerning barium begin. :)"
>
> What freak out? What's wrong with barium?
> - Vince
>
>
Nothing that I can find but there is an undercurrent of fear when it comes
to barium. This has been discussed on clayart before. Interestingly I can
not find any scientific data to back up the banning of the material from a
ceramics studio.
--
Randall in Atlanta
http://wrandallmoody.com
Edouard Bastarache on sat 25 sep 10
Here we go again with barium.
Some will never know.
Enuff of barium BS, time
for my daily walk, it will be
more useful to my health !!!
Gis,
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://www.flickr.com/photos/30058682@N00/
http://edouardbastarache.blogspot.com/
http://blogsalbertbastarache.blogspot.com/
http://cerampeintures.blogspot.com/
http://www.facebook.com/edouard.bastarache
----- Original Message -----
From: "Vince Pitelka"
To:
Sent: Saturday, September 25, 2010 8:08 PM
Subject: Re: Jasperware
> Randall Moody wrote:
> "Let the freak out concerning barium begin. :)"
>
> What freak out? What's wrong with barium?
> - Vince
>
> Vince Pitelka
> Appalachian Center for Craft
> Tennessee Tech University
> vpitelka@dtccom.net; wpitelka@tntech.edu
> http://iweb.tntech.edu/wpitelka
>
Vince Pitelka on sat 25 sep 10
Randall Moody wrote:
"Let the freak out concerning barium begin. :)"
What freak out? What's wrong with barium?
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka
Dinah Snipes Steveni on sun 26 sep 10
This could be the case, but I haven't researched any further. Wedgwood noto=
riously secretive about their recipes. I do have a couple of very old Engli=
sh Workshop Receipt Books where I might be able to locate something helpful=
. I can build some fireworks! Or make black lacquer for smartening up your =
coach-work on your four-in-hand, or a powder to whiten your gloves.... But =
the "receipts" or recipes are usually based on out moded materials and proc=
esses. What's your reference for the different bodies and treatments? With =
all due respect, until I can cite your references myself, I still maintain =
Jasper ware is a porcelain body with a glaze like covering and you are thin=
king about basalt bodies created with stains. Why don't access The Potterie=
s Museum & Art Gallery at www.stoke.gov.uk -- this is in Stoke on Trent in =
the Midlands of the United Kingdom where it all happened. You should be abl=
e to noodle around and get some answers.
Dinah
Edouard Bastarache on sun 26 sep 10
"Interestingly I cannot find any scientific data
to back up the banning of the material from a ceramics studio.
Randall in Atlanta"
Me neither!!!
Gis,
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://www.flickr.com/photos/30058682@N00/
http://edouardbastarache.blogspot.com/
http://blogsalbertbastarache.blogspot.com/
http://cerampeintures.blogspot.com/
http://www.facebook.com/edouard.bastarache
Vince Pitelka on sun 26 sep 10
Randall Moody wrote:
"Nothing that I can find but there is an undercurrent of fear when it comes
to barium. This has been discussed on clayart before. Interestingly I can
not find any scientific data to back up the banning of the material from a
ceramics studio.
Well of course that is true Randall. Remember that I've been intimately
involved with this list for fifteen years. I was being sarcastic, because
so many people just tend to explode with paranoia at the mere mention of
barium. It has been eliminated from so many academic glaze labs, and the
students in those labs are handicapped without it. There are effects that
cannot be achieved with anything but barium, and strontium is not an
effective substitute. You can do wonderful things with strontium, but it
cannot create the same effect as those seductive barium matts.
If people are going to eliminate the use of barium, then they should
eliminate everything else potentially poisonous from their surroundings,
like gasoline, charcoal lighter, kerosene, detergent, and a whole host of
household chemicals. They should probably eliminate silica too because it
causes silicosis. The level of fear around barium is irrational and serves
no one. It can be used perfectly safely, as as with so many other dangerou=
s
substances we come in contact with every day of our lives.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka
Larry Kruzan on mon 27 sep 10
When I was in school, a Chem prof and I hit it off and became friends. When
I showed him a few of the posts about Barium he experienced what I can only
call a belly laugh. When he finally could talk, he offered the opinion that
people who are so concerned about Barium should never find out what comes
out of their kitchen range when they cook!
He then looked around my glaze mixing area, pulling a few bottles off the
shelves, informing me that "these" were the ones I needed to be careful of.
Bleach, Toilet bowl cleaner, lacquer thinner, Chrome Oxide, Cobalt oxide,
among a few other things that held no surprise.
When he got to the colorants, he asked me what percentages they were used i=
n
glazes, and when I informed him that most were less than 5% except for the
RIO he put them all back on the shelves - except my cleaners and solvents.
Concluding that these were very dangerous in contact or ingestion.
Larry Kruzan
Lost Creek Pottery
www.lostcreekpottery.com
-----Original Message-----
From: Clayart [mailto:Clayart@LSV.CERAMICS.ORG] On Behalf Of Vince Pitelka
Sent: Sunday, September 26, 2010 2:17 PM
To: Clayart@LSV.CERAMICS.ORG
Subject: Re: Jasperware
Randall Moody wrote:
"Nothing that I can find but there is an undercurrent of fear when it comes
to barium. This has been discussed on clayart before. Interestingly I can
not find any scientific data to back up the banning of the material from a
ceramics studio.
Well of course that is true Randall. Remember that I've been intimately
involved with this list for fifteen years. I was being sarcastic, because
so many people just tend to explode with paranoia at the mere mention of
barium. It has been eliminated from so many academic glaze labs, and the
students in those labs are handicapped without it. There are effects that
cannot be achieved with anything but barium, and strontium is not an
effective substitute. You can do wonderful things with strontium, but it
cannot create the same effect as those seductive barium matts.
If people are going to eliminate the use of barium, then they should
eliminate everything else potentially poisonous from their surroundings,
like gasoline, charcoal lighter, kerosene, detergent, and a whole host of
household chemicals. They should probably eliminate silica too because it
causes silicosis. The level of fear around barium is irrational and serves
no one. It can be used perfectly safely, as as with so many other dangerou=
s
substances we come in contact with every day of our lives.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka
=3D=3D=3D=3D=3D=3D=3D
Email scanned by PC Tools - No viruses or spyware found.
(Email Guard: 7.0.0.18, Virus/Spyware Database: 6.15960)
http://www.pctools.com/
=3D=3D=3D=3D=3D=3D=3D
Larry Kruzan on wed 29 sep 10
Hey Mike,
It sure is flammable. You have to get the air-fuel (powdered creamer) mix
right, but it can be REAL exciting. Myth Busters did a segment on it a
couple years ago. It may be on their website - it was a BIG explosion!
That's why I prefer Half and Half - you can't blow it up.
One reason I have been a little grumpy for the last few days (according to
Debbie) was that I have been forced to take mineral oil - yuck! The reason =
-
Barium! I had to have a upper GI x-ray study this past Friday. For those wh=
o
have never had this little jewel of an exam, You drink a barium milkshake
while the radiologist takes pictures.
After the test you have to drink mineral oil to make sure the barium gets
flushed out of your system. I'll leave the rest of the details to your
imagination. If you don't it will plug up your bowel like concrete. Wow! I
guess exposure to barium IS bad for you!!!!!
I wonder how much glaze I would have to drink to equal the barium that the
Docs forced me to drink for that one test?
FYT - I asked if I could get it in coffee flavor, the nurse had no sense of
humor.
Larry Kruzan
Lost Creek Pottery
www.lostcreekpottery.com
-----Original Message-----
From: Mike Gordon [mailto:clayart@earthlink.net]
Sent: Tuesday, September 28, 2010 6:29 PM
To: Larry Kruzan
Subject: Re: Jasperware
I just heard on the radio as a quiz question, a common household item that
is flammable. answ. =3D Dairy creamer?? I'd give it a try but I drink mine
black. Mike Gordon On Sep 27, 2010, at 7:09 PM, Larry Kruzan wrote:
> When I was in school, a Chem prof and I hit it off and became friends.
> When
> I showed him a few of the posts about Barium he experienced what I can
> only call a belly laugh. When he finally could talk, he offered the
> opinion that people who are so concerned about Barium should never
> find out what comes out of their kitchen range when they cook!
> He then looked around my glaze mixing area, pulling a few bottles off
> the shelves, informing me that "these" were the ones I needed to be
> careful of.
> Bleach, Toilet bowl cleaner, lacquer thinner, Chrome Oxide, Cobalt
> oxide, among a few other things that held no surprise.
> When he got to the colorants, he asked me what percentages they were
> used in glazes, and when I informed him that most were less than 5%
> except for the RIO he put them all back on the shelves - except my
> cleaners and solvents.
> Concluding that these were very dangerous in contact or ingestion.
> Larry Kruzan
> Lost Creek Pottery
> www.lostcreekpottery.com
>
>
>
>
> -----Original Message-----
> From: Clayart [mailto:Clayart@LSV.CERAMICS.ORG] On Behalf Of Vince
> Pitelka
> Sent: Sunday, September 26, 2010 2:17 PM
> To: Clayart@LSV.CERAMICS.ORG
> Subject: Re: Jasperware
>
> Randall Moody wrote:
> "Nothing that I can find but there is an undercurrent of fear when it
> comes to barium. This has been discussed on clayart before.
> Interestingly I can not find any scientific data to back up the
> banning of the material from a ceramics studio.
>
> Well of course that is true Randall. Remember that I've been
> intimately involved with this list for fifteen years. I was being
> sarcastic, because so many people just tend to explode with paranoia
> at the mere mention of barium. It has been eliminated from so many
> academic glaze labs, and the students in those labs are handicapped
> without it. There are effects that cannot be achieved with anything
> but barium, and strontium is not an effective substitute. You can do
> wonderful things with strontium, but it cannot create the same effect
> as those seductive barium matts.
>
> If people are going to eliminate the use of barium, then they should
> eliminate everything else potentially poisonous from their
> surroundings, like gasoline, charcoal lighter, kerosene, detergent,
> and a whole host of household chemicals. They should probably
> eliminate silica too because it causes silicosis. The level of fear
> around barium is irrational and serves no one. It can be used
> perfectly safely, as as with so many other dangerous substances we
> come in contact with every day of our lives.
> - Vince
>
> Vince Pitelka
> Appalachian Center for Craft
> Tennessee Tech University
> vpitelka@dtccom.net; wpitelka@tntech.edu
> http://iweb.tntech.edu/wpitelka
>
>
>
>
>
> =3D=3D=3D=3D=3D=3D=3D
> Email scanned by PC Tools - No viruses or spyware found.
> (Email Guard: 7.0.0.18, Virus/Spyware Database: 6.15960)
> http://www.pctools.com/ =3D=3D=3D=3D=3D=3D=3D
>
=3D=3D=3D=3D=3D=3D=3D
Email scanned by PC Tools - No viruses or spyware found.
(Email Guard: 7.0.0.18, Virus/Spyware Database: 6.15960)
http://www.pctools.com/
=3D=3D=3D=3D=3D=3D=3D
Robert Harris on wed 29 sep 10
Larry - Big difference is that they use Barium Sulphate in your gut
analysis, which is extremely insoluble. Potters tend to use Barium
Carbonate which doesn't release sulphur dioxide gas, but is slightly
soluble. The solubility problem is what leads to toxicity.
However even so it's not something I'm going to get particularly worried ab=
=3D
out.
Robert
On Wed, Sep 29, 2010 at 5:34 PM, Larry Kruzan wr=
=3D
ote:
> Hey Mike,
>
> It sure is flammable. You have to get the air-fuel (powdered creamer) mix
> right, but it can be REAL exciting. Myth Busters did a segment on it a
> couple years ago. It may be on their website - it was a BIG explosion!
>
> That's why I prefer =3DA0Half and Half - you can't blow it up.
>
> One reason I have been a little grumpy for the last few days (according t=
=3D
o
> Debbie) was that I have been forced to take mineral oil - yuck! The reaso=
=3D
n -
> Barium! I had to have a upper GI x-ray study this past Friday. For those =
=3D
who
> have never had this little jewel of an exam, You drink a barium milkshake
> while the radiologist takes pictures.
>
> After the test you have to drink mineral oil to make sure the barium gets
> flushed out of your system. I'll leave the rest of the details to your
> imagination. If you don't it will plug up your bowel like concrete. Wow! =
=3D
I
> guess exposure to barium IS bad for you!!!!!
>
> I wonder how much glaze I would have to drink to equal the barium that th=
=3D
e
> Docs forced me to drink for that one test?
>
> FYT - I asked if I could get it in coffee flavor, the nurse had no sense =
=3D
of
> humor.
>
> Larry Kruzan
> Lost Creek Pottery
> www.lostcreekpottery.com
>
>
>
>
> -----Original Message-----
> From: Mike Gordon [mailto:clayart@earthlink.net]
> Sent: Tuesday, September 28, 2010 6:29 PM
> To: Larry Kruzan
> Subject: Re: Jasperware
>
> I just heard on the radio as a quiz question, a common household item tha=
=3D
t
> is flammable. answ. =3D3D Dairy creamer?? I'd give it a try but I drink m=
in=3D
e
> black. Mike Gordon On Sep 27, 2010, at 7:09 PM, Larry Kruzan wrote:
>
>> When I was in school, a Chem prof and I hit it off and became friends.
>> When
>> I showed him a few of the posts about Barium he experienced what I can
>> only call a belly laugh. When he finally could talk, he offered the
>> opinion that people who are so concerned about Barium should never
>> find out what comes out of their kitchen range when they cook!
>> He then looked around my glaze mixing area, pulling a few bottles off
>> the shelves, informing me that "these" were the ones I needed to be
>> careful of.
>> Bleach, Toilet bowl cleaner, lacquer thinner, Chrome Oxide, Cobalt
>> oxide, among a few other things that held no surprise.
>> When he got to the colorants, he asked me what percentages they were
>> used in glazes, and when I informed him that most were less than 5%
>> except for the RIO he put them all back on the shelves - except my
>> cleaners and solvents.
>> Concluding that these were very dangerous in contact or ingestion.
>> Larry Kruzan
>> Lost Creek Pottery
>> www.lostcreekpottery.com
>>
>>
>>
>>
>> -----Original Message-----
>> From: Clayart [mailto:Clayart@LSV.CERAMICS.ORG] On Behalf Of Vince
>> Pitelka
>> Sent: Sunday, September 26, 2010 2:17 PM
>> To: Clayart@LSV.CERAMICS.ORG
>> Subject: Re: Jasperware
>>
>> Randall Moody wrote:
>> "Nothing that I can find but there is an undercurrent of fear when it
>> comes to barium. This has been discussed on clayart before.
>> Interestingly I can not find any scientific data to back up the
>> banning of the material from a ceramics studio.
>>
>> Well of course that is true Randall. =3DA0Remember that I've been
>> intimately involved with this list for fifteen years. =3DA0I was being
>> sarcastic, because so many people just tend to explode with paranoia
>> at the mere mention of barium. =3DA0It has been eliminated from so many
>> academic glaze labs, and the students in those labs are handicapped
>> without it. =3DA0There are effects that cannot be achieved with anything
>> but barium, and strontium is not an effective substitute. =3DA0You can d=
o
>> wonderful things with strontium, but it cannot create the same effect
>> as those seductive barium matts.
>>
>> If people are going to eliminate the use of barium, then they should
>> eliminate everything else potentially poisonous from their
>> surroundings, like gasoline, charcoal lighter, kerosene, detergent,
>> and a whole host of household chemicals. =3DA0They should probably
>> eliminate silica too because it causes silicosis. =3DA0The level of fear
>> around barium is irrational and serves no one. =3DA0It can be used
>> perfectly safely, as as with so many other dangerous substances we
>> come in contact with every day of our lives.
>> - Vince
>>
>> Vince Pitelka
>> Appalachian Center for Craft
>> Tennessee Tech University
>> vpitelka@dtccom.net; wpitelka@tntech.edu
>> http://iweb.tntech.edu/wpitelka
>>
>>
>>
>>
>>
>> =3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D
>> Email scanned by PC Tools - No viruses or spyware found.
>> (Email Guard: 7.0.0.18, Virus/Spyware Database: 6.15960)
>> http://www.pctools.com/ =3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D
>>
>
>
>
>
>
> =3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D
> Email scanned by PC Tools - No viruses or spyware found.
> (Email Guard: 7.0.0.18, Virus/Spyware Database: 6.15960)
> http://www.pctools.com/
> =3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D
>
--=3D20
----------------------------------------------------------
John Hesselberth on wed 29 sep 10
On Sep 29, 2010, at 5:34 PM, Larry Kruzan wrote:
> I wonder how much glaze I would have to drink to equal the barium that =
=3D
the
> Docs forced me to drink for that one test?
Hi Larry,
Please don't equate barium sulfate, which you drank, to barium carbonate =
=3D
which is the usual form of barium used in glazes. Barium carbonate is =3D
toxic. It is used for rat poison. The oral LD50 (dose that kills 50%) in =
=3D
rats is 630 mg/kg. It has toxic effects in humans as low as 29 mg/kg and =
=3D
has been known to kill humans at oral doses as low as 57 mg/kg. For a 50 =
=3D
lb. child that is less than 1 gram. Handle the raw material with care! =3D
Barium sulfate is not toxic. (reference Dangerous Properties of =3D
Industrial Materials, N. Irving Sax, 6th edition)
Regards,
John
Lee Love on wed 29 sep 10
On Wed, Sep 29, 2010 at 4:34 PM, Larry Kruzan wr=
=3D
ote:
> I wonder how much glaze I would have to drink to equal the barium that th=
=3D
e
> Docs forced me to drink for that one test?
Can Barium Sulfate be used in glazes?
--
=3DA0Lee, a Mashiko potter in Minneapolis
http://mingeisota.blogspot.com/
=3D93Observe the wonders as they occur around you. Don't claim them. Feel
the artistry moving through and be silent.=3D94 --Rumi
| |
|
