Carole Fox on thu 10 may 07
I am trying to reproduce a glaze that no longer works for me. I have all the
qualities I am looking for using a base from the MC6G book and RIO, cobalt
oxide and rutile...EXCEPT it is not breaking golden brown like the glaze I
am trying to match. Can I add more iron or rutile or do I need to try
another base?
Carole Fox
Silver Fox Pottery
Elkton, MD
silverfoxpottery@comcast.net
Ivor and Olive Lewis on fri 11 may 07
Dear Carole Fox,=20
Given the origin of your glaze you must follow the instructions. I =
suspect that you need to need to control the cooling rate, slowing it =
down to allow time for crystals to form.
Best regards,
Ivor Lewis.
Redhill,
South Australia.
Ron Roy on fri 11 may 07
HI Carol,
The breaking we got on the glazes in our book was because of slow cooling -
is this a factor with your glaze?
Why are you using cobalt to get brown?
RR
>I am trying to reproduce a glaze that no longer works for me. I have all the
>qualities I am looking for using a base from the MC6G book and RIO, cobalt
>oxide and rutile...EXCEPT it is not breaking golden brown like the glaze I
>am trying to match. Can I add more iron or rutile or do I need to try
>another base?
>Carole Fox
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Carole Fox on fri 11 may 07
Ron-
This is a floating blue that I want to break golden brown over high spots.I
am using the variegated blue base with the same colorants as my old fb that
no longer works.
Carole Fox
Silver Fox Pottery
Elkton, MD
silverfoxpottery@comcast.net
----- Original Message -----
From: "Ron Roy"
To:
Sent: Friday, May 11, 2007 2:04 PM
Subject: Re: tweaking a glaze to break brown
> HI Carol,
>
> The breaking we got on the glazes in our book was because of slow
> cooling -
> is this a factor with your glaze?
>
> Why are you using cobalt to get brown?
>
> RR
>
>>I am trying to reproduce a glaze that no longer works for me. I have all
>>the
>>qualities I am looking for using a base from the MC6G book and RIO, cobalt
>>oxide and rutile...EXCEPT it is not breaking golden brown like the glaze I
>>am trying to match. Can I add more iron or rutile or do I need to try
>>another base?
>>Carole Fox
Carole Fox on tue 15 may 07
Hello Ivor.
What I am trying to do is make a floating blue that breaks golden brown over
texture. I have a glaze that is the right shade and variegation I need, but
it breaks white or light green. I am going to try increasing the iron as Ron
suggested to me. I was wondering if the base glaze itself might be negating
the iron that is already in the glaze. This same mix of colorants (in this
glaze), had the breaking- brown effect in another base.
I hope this works. I have been struggling for a long time now to find a
dinnerware-safe glaze with this effect that will fit my cone 6 Standard
porcelain clay (551).
Thank you for your comments.
Carole Fox
Silver Fox Pottery
Elkton, MD
silverfoxpottery@comcast.net
----- Original Message -----
From: "Ivor and Olive Lewis"
To:
Sent: Friday, May 11, 2007 4:00 AM
Subject: tweaking a glaze to break brown
Dear Carole Fox,
Given the origin of your glaze you must follow the instructions. I suspect
that you need to need to control the cooling rate, slowing it down to allow
time for crystals to form.
Alex Solla on tue 15 may 07
Try using an iron slip on your claybody. Try your claybody plus 2-10% RIO.
Most blue glazes wont break brown on a porcelaineous body.
Good luck
-Alex
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG]On Behalf Of Carole Fox
Sent: Tuesday, May 15, 2007 1:28 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: tweaking a glaze to break brown
Hello Ivor.
What I am trying to do is make a floating blue that breaks golden brown over
texture. I have a glaze that is the right shade and variegation I need, but
it breaks white or light green. I am going to try increasing the iron as Ron
suggested to me. I was wondering if the base glaze itself might be negating
the iron that is already in the glaze. This same mix of colorants (in this
glaze), had the breaking- brown effect in another base.
I hope this works. I have been struggling for a long time now to find a
dinnerware-safe glaze with this effect that will fit my cone 6 Standard
porcelain clay (551).
Thank you for your comments.
Carole Fox
Silver Fox Pottery
Elkton, MD
silverfoxpottery@comcast.net
----- Original Message -----
From: "Ivor and Olive Lewis"
To:
Sent: Friday, May 11, 2007 4:00 AM
Subject: tweaking a glaze to break brown
Dear Carole Fox,
Given the origin of your glaze you must follow the instructions. I suspect
that you need to need to control the cooling rate, slowing it down to allow
time for crystals to form.
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Lee Love on wed 16 may 07
Carol,
What clay body are you using?
--
Lee in Mashiko, Japan
Minneapolis, Minnesota USA
http://mashikopots.blogspot.com/
"To affect the quality of the day, that is the highest of arts." -
Henry David Thoreau
"Let the beauty we love be what we do." - Rumi
Graham, James L. on wed 16 may 07
I'm looking at a mug I was given awhile back (no idea of its provenence).
It has exactly what you describe: a floating blue glaze that breaks brown,
on a porcalain body. No sign of any oxide wash, either. Not much help, I
know, other than to confirm that it is possible.
Jim
Carole Fox on thu 17 may 07
I am using Standard 551. I know that it is possible to have a floating blue
break brown on a white clay because I have had a glaze do this.
For many years I had a tried and true floating blue glaze that had this
breaking effect. Suddenly it stopped fitting my clay. Now I need to make
some pieces to match a dinnerware set that I made back when the glaze was
working. I experimented with the MC6G base for variegated blue, adding the
colorants (rutile, cobalt oxide and RIO) that were in the original glaze.
The color is fine except that it breaks greenish white.
I will test adding more RIO to the glaze and see if that does the trick. I
am not interested in changing the clay or putting a slip or wash on the pot
before glazing.
Carole Fox
Silver Fox Pottery
Elkton, MD
silverfoxpottery@comcast.net
----- Original Message -----
From: "Lee Love"
To:
Sent: Wednesday, May 16, 2007 8:20 AM
Subject: Re: tweaking a glaze to break brown
> Carol,
>
> What clay body are you using?
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