chunks coming off of cone 06-04 clay

updated thu 5 jun 08

Cindy reed on sun 25 may 08

I am posting this for one of my class mates.

She has mixed up the following clay recipe.

Low-fire talc clay

Ball Clay 45.9
Silica 200 (flint) 20.2
Talc 12.2
Whiting 6.1
Gray Grog (20 mesh) 15.6
100.0

This is a recipe she got from one of her professors.

When she fires to 06 small chunks are coming out of her pieces. She is
making sculptures so they are thicker than a thrown piece. Her professor
said she must have some plaster in her clay. She is sure that is not the
case as she mixed up the clay herself in a big dough mixer which was clean
when she started.

Any ideas as to why this is occurring will be greatly appreciated as she is
working on pieces for her senior show and is not happy with the results she
has been getting.

Thank you,
Cindy Reed
Greenville, NC

Helen Bates on mon 26 may 08

Cindy,

Others more experienced and knowledgeable than I may have more specific
answers, or may have additional questions for your friend, but from what
I have been reading today, it seems that too large mesh of whiting could
be a culprit, just as bits of plaster can be. Finer mesh of either
should not be a problem.

These posts and web pages may be of interest/use:

http://www.goshen.edu/art/DeptPgs/rework.html
http://thelibrary.springfield.missouri.org/lochist/periodicals/bittersweet/fa82b.htm

http://www.westernclay.com/USA/ProductsandServices/CalciumCarbonate/tabid/60/Default.aspx
http://www.potters.org/subject34561.htm
http://www.potters.org/subject78933.htm
http://www.potters.org/subject78853.htm

sincerely,

Helen

--
Helen Bates
Belleville, Ontario, Canada
Clayarters' URLs: http://amsterlaw.com/clayart/

Ron Roy on mon 26 may 08

Could be the whiting balling up during the mixing - best to dry mix
ingrediants well before adding water - and sieve the whiting through 50
mesh.

RR

>I am posting this for one of my class mates.
>
>She has mixed up the following clay recipe.
>
>Low-fire talc clay
>
>Ball Clay 45.9
>Silica 200 (flint) 20.2
>Talc 12.2
>Whiting 6.1
>Gray Grog (20 mesh) 15.6
> 100.0
>
>This is a recipe she got from one of her professors.
>
>When she fires to 06 small chunks are coming out of her pieces. She is
>making sculptures so they are thicker than a thrown piece. Her professor
>said she must have some plaster in her clay. She is sure that is not the
>case as she mixed up the clay herself in a big dough mixer which was clean
>when she started.
>
>Any ideas as to why this is occurring will be greatly appreciated as she is
>working on pieces for her senior show and is not happy with the results she
>has been getting.
>
>Thank you,
>Cindy Reed
>Greenville, NC

Ron Roy
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0

Bill Merrill on tue 27 may 08

This is a multi-part message in MIME format.

------_=_NextPart_001_01C8C029.83D3A9C9
Content-Type: text/plain;
charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

Any glaze will mix better if you ADD the dry ingredients to the water.
Initially the glaze may be thick, if so add water to the consistency you
want. Plaster spits should revel themselves after firing or even weeks
later. The tell tale result is when you see a small piece of plaster in
the center of the pop out.

=20

-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Ron Roy
Sent: Monday, May 26, 2008 6:18 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Chunks coming off of cone 06-04 clay

=20

Could be the whiting balling up during the mixing - best to dry mix

ingrediants well before adding water - and sieve the whiting through 50

mesh.

=20

RR

=20

>I am posting this for one of my class mates.

>=20

>She has mixed up the following clay recipe.

>=20

>Low-fire talc clay

>=20

>Ball Clay 45.9

>Silica 200 (flint) 20.2

>Talc 12.2

>Whiting 6.1

>Gray Grog (20 mesh) 15.6

> 100.0

>=20

>This is a recipe she got from one of her professors.

>=20

>When she fires to 06 small chunks are coming out of her pieces. She is

>making sculptures so they are thicker than a thrown piece. Her
professor

>said she must have some plaster in her clay. She is sure that is not
the

>case as she mixed up the clay herself in a big dough mixer which was
clean

>when she started.

>=20

>Any ideas as to why this is occurring will be greatly appreciated as
she is

>working on pieces for her senior show and is not happy with the results
she

>has been getting.

>=20

>Thank you,

>Cindy Reed

>Greenville, NC

=20

Ron Roy

15084 Little Lake Road

Brighton, Ontario

Canada

K0K 1H0


------_=_NextPart_001_01C8C029.83D3A9C9
Content-Type: text/html;
charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
xmlns:st1=3D"urn:schemas-microsoft-com:office:smarttags" =
xmlns=3D"http://www.w3.org/TR/REC-html40">


charset=3Dus-ascii">

namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"
name=3D"country-region"/>
namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"
name=3D"Street"/>
namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"
name=3D"address"/>
namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"
name=3D"State"/>
namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"
name=3D"City"/>
namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"
name=3D"place"/>
namespaceuri=3D"urn:schemas-microsoft-com:office:smarttags"
name=3D"PersonName"/>

style=3D'font-size:
12.0pt'>Any glaze will mix better if you ADD the dry ingredients to the =
water.
Initially the glaze may be thick, if so add water to the consistency you =
want. 
Plaster spits should revel themselves after firing or even weeks =
later.  The
tell tale result is when you see a small piece of plaster in the center =
of the
pop out.

style=3D'font-size:
10.0pt'> 

style=3D'font-size:
10.0pt'>-----Original Message-----

From: Clayart
[mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Ron Roy

Sent: Monday, May 26, 2008 6:18 PM

To: CLAYART@LSV.CERAMICS.ORG

Subject: Re: Chunks coming off of cone 06-04 clay

style=3D'font-size:
10.0pt'> 

style=3D'font-size:
10.0pt'>Could be the whiting balling up during the mixing - best to dry =
mix

style=3D'font-size:
10.0pt'>ingrediants well before adding water - and sieve the whiting =
through 50

style=3D'font-size:
10.0pt'>mesh.

style=3D'font-size:
10.0pt'> 

style=3D'font-size:
10.0pt'>RR

style=3D'font-size:
10.0pt'> 

style=3D'font-size:
10.0pt'>>I am posting this for one of my class =
mates.

style=3D'font-size:
10.0pt'>> 

style=3D'font-size:
10.0pt'>>She has mixed up the following clay =
recipe.

style=3D'font-size:
10.0pt'>> 

style=3D'font-size:
10.0pt'>>Low-fire talc clay

style=3D'font-size:
10.0pt'>> 

style=3D'font-size:
10.0pt'>>Ball =
Clay           &nb=
sp;   45.9

style=3D'font-size:
10.0pt'>>Silica 200 (flint)      =
20.2

style=3D'font-size:
10.0pt'>>Talc         &nb=
sp;          =
12.2

style=3D'font-size:
10.0pt'>>Whiting         =
         =
6.1

style=3D'font-size:
10.0pt'>>Gray Grog (20 mesh)     =
15.6

style=3D'font-size:
10.0pt'>>          &=
nbsp;            =
100.0

style=3D'font-size:
10.0pt'>> 

style=3D'font-size:
10.0pt'>>This is a recipe she got from one of her =
professors.

style=3D'font-size:
10.0pt'>> 

style=3D'font-size:
10.0pt'>>When she fires to 06 small chunks are coming out of her =
pieces. 
She is

style=3D'font-size:
10.0pt'>>making sculptures so they are thicker than a thrown =
piece.  Her
professor

style=3D'font-size:
10.0pt'>>said she must have some plaster in her clay.  She is =
sure that is
not the

style=3D'font-size:
10.0pt'>>case as she mixed up the clay herself in a big dough mixer =
which
was clean

style=3D'font-size:
10.0pt'>>when she started.

style=3D'font-size:
10.0pt'>> 

style=3D'font-size:
10.0pt'>>Any ideas as to why this is occurring will be greatly =
appreciated
as she is

style=3D'font-size:
10.0pt'>>working on pieces for her senior show and is not happy with =
the
results she

style=3D'font-size:
10.0pt'>>has been getting.

style=3D'font-size:
10.0pt'>> 

style=3D'font-size:
10.0pt'>>Thank you,

style=3D'font-size:
10.0pt'>>Cindy Reed

style=3D'font-size:
10.0pt'>>w:st=3D"on">Greenville, w:st=3D"on">NC

style=3D'font-size:
10.0pt'> 

style=3D'font-size:
10.0pt'>Ron Roy

style=3D'font-size:
10.0pt'>15084 Little w:st=3D"on">Lake =
Road

w:st=3D"on">face=3D"Courier New">style=3D'font-size:10.0pt'>Brighton,
Ontario

w:st=3D"on">size=3D2 face=3D"Courier New">style=3D'font-size:10.0pt'>Canadaregion>

style=3D'font-size:
10.0pt'>K0K 1H0

------_=_NextPart_001_01C8C029.83D3A9C9--

Cindy reed on wed 4 jun 08

Ron and Bill,

Thanks for taking time to respond, I have passed this on to my friend and
she will try your suggestions.

Cindy



On 5/27/08 2:43 PM, "Bill Merrill" wrote:

> Any glaze will mix better if you ADD the dry ingredients to the water.
> Initially the glaze may be thick, if so add water to the consistency you want.
> Plaster spits should revel themselves after firing or even weeks later. The
> tell tale result is when you see a small piece of plaster in the center of the
> pop out.
>
> -----Original Message-----
> From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Ron Roy
> Sent: Monday, May 26, 2008 6:18 PM
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Re: Chunks coming off of cone 06-04 clay
>
> Could be the whiting balling up during the mixing - best to dry mix
> ingrediants well before adding water - and sieve the whiting through 50
> mesh.
>
> RR
>
>> >I am posting this for one of my class mates.
>> >
>> >She has mixed up the following clay recipe.
>> >
>> >Low-fire talc clay
>> >
>> >Ball Clay 45.9
>> >Silica 200 (flint) 20.2
>> >Talc 12.2
>> >Whiting 6.1
>> >Gray Grog (20 mesh) 15.6
>> > 100.0
>> >
>> >This is a recipe she got from one of her professors.
>> >
>> >When she fires to 06 small chunks are coming out of her pieces. She is
>> >making sculptures so they are thicker than a thrown piece. Her professor
>> >said she must have some plaster in her clay. She is sure that is not the
>> >case as she mixed up the clay herself in a big dough mixer which was clean
>> >when she started.
>> >
>> >Any ideas as to why this is occurring will be greatly appreciated as she is
>> >working on pieces for her senior show and is not happy with the results she
>> >has been getting.
>> >
>> >Thank you,
>> >Cindy Reed
>> >Greenville, NC
>
> Ron Roy
> 15084 Little Lake Road
> Brighton, Ontario
> Canada
> K0K 1H0
>