Judy Musicant on thu 7 sep 00
This cone 6 glaze recipe was posted on Clayart some time ago and I have =
tested it with these strange results. I first mixed it in a 100 gram =
test batch, and got a beautiful dark burgundy glaze that pools a mottled =
blue/purple. My husband then mixed me a 4000 gram batch, and when I =
tested that the glaze was a much paler mauve - nice, but not what I was =
looking for. It also pinholed some, and I was convinced he had mad a =
mistake in the mixing. I thereupon mixed a new test - this time a 1000 =
gram batch - and got the original dark burgundy I was looking for. I =
just mixed (very carefully) and tested a new 6000 gram batch and got the =
same lighter mauve color - this time without the pinholes. It's =
actually not bad, but not terribly to my taste. Maybe I'll fool around =
with some cobalt oxide decoration. But does anyone have any ideas as to =
the cause of this strange lightening of the glaze from small batch to =
large? Might it have something to do with the tiny .15% of chrome ox? =
Should I add a bit more of the Chrome, or was even less needed? Thanks =
for your thoughts.
Red, Purple Pink, Mauve
Ger. Bor. 21
Neph. Sy. 16
E.P. K. 11
Whiting 20
Silica 32
Tin 5
Chrome Ox. .15 =20
J102551@AOL.COM on fri 8 sep 00
I have had this same result although I modified the glaze slightly and fire
porcelain at cone 8 in Oxidation. I find that when I fire this glaze with
other copper glazes I get the dark, intense colors but i I fire the whole
kiln with just this glaze I get a beautiful pale pink with blue and lavender.
Wait till you over-fire it. I tried increasing my firing time and going a
cone higher and got a gorgeous hares fur sea green. Jeri
Ron Roy on tue 12 sep 00
I'm guessing - could it be the cooling - ruby crystals take some time to
develop I am told.
RR
>This cone 6 glaze recipe was posted on Clayart some time ago and I have
>tested it with these strange results. I first mixed it in a 100 gram test
>batch, and got a beautiful dark burgundy glaze that pools a mottled
>blue/purple. My husband then mixed me a 4000 gram batch, and when I
>tested that the glaze was a much paler mauve - nice, but not what I was
>looking for. It also pinholed some, and I was convinced he had mad a
>mistake in the mixing. I thereupon mixed a new test - this time a 1000
>gram batch - and got the original dark burgundy I was looking for. I just
>mixed (very carefully) and tested a new 6000 gram batch and got the same
>lighter mauve color - this time without the pinholes. It's actually not
>bad, but not terribly to my taste. Maybe I'll fool around with some
>cobalt oxide decoration. But does anyone have any ideas as to the cause
>of this strange lightening of the glaze from small batch to large? Might
>it have something to do with the tiny .15% of chrome ox? Should I add a
>bit more of the Chrome, or was even less needed? Thanks for your
>thoughts.
>
>Red, Purple Pink, Mauve
>
>Ger. Bor. 21
>Neph. Sy. 16
>E.P. K. 11
>Whiting 20
>Silica 32
>
>Tin 5
>Chrome Ox. .15
>
>______________________________________________________________________________
>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.
Ron Roy
93 Pegasus Trail
Scarborough
Ontario, Canada
M1G 3N8
Evenings 416-439-2621
Fax 416-438-7849
David Clark on tue 12 sep 00
I know this may sound overly simplistic but you didn't say if you stirred
the glaze mix each time prior to application. Would the larger volume of
water give the ingredients a chance to settle?
Dave Clark in Upland, Ca. where its damn hot 107 degrees
>From: Ron Roy
>Reply-To: Ceramic Arts Discussion List
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: Re: Strange tale of the burgundy glaze gone pink
>Date: Tue, 12 Sep 2000 00:46:26 -0500
>
>I'm guessing - could it be the cooling - ruby crystals take some time to
>develop I am told.
>
>RR
>
> >This cone 6 glaze recipe was posted on Clayart some time ago and I have
> >tested it with these strange results. I first mixed it in a 100 gram
>test
> >batch, and got a beautiful dark burgundy glaze that pools a mottled
> >blue/purple. My husband then mixed me a 4000 gram batch, and when I
> >tested that the glaze was a much paler mauve - nice, but not what I was
> >looking for. It also pinholed some, and I was convinced he had mad a
> >mistake in the mixing. I thereupon mixed a new test - this time a 1000
> >gram batch - and got the original dark burgundy I was looking for. I
>just
> >mixed (very carefully) and tested a new 6000 gram batch and got the same
> >lighter mauve color - this time without the pinholes. It's actually not
> >bad, but not terribly to my taste. Maybe I'll fool around with some
> >cobalt oxide decoration. But does anyone have any ideas as to the cause
> >of this strange lightening of the glaze from small batch to large? Might
> >it have something to do with the tiny .15% of chrome ox? Should I add a
> >bit more of the Chrome, or was even less needed? Thanks for your
> >thoughts.
> >
> >Red, Purple Pink, Mauve
> >
> >Ger. Bor. 21
> >Neph. Sy. 16
> >E.P. K. 11
> >Whiting 20
> >Silica 32
> >
> >Tin 5
> >Chrome Ox. .15
> >
> >______________________________________________________________________________
> >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.
>
>Ron Roy
>93 Pegasus Trail
>Scarborough
>Ontario, Canada
>M1G 3N8
>Evenings 416-439-2621
>Fax 416-438-7849
>
>______________________________________________________________________________
>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.
_________________________________________________________________________
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Sharon31 on tue 12 sep 00
This Glaze as it tells you
KEMP'S PINK TO PURPLE (^6 OX or RED)
21.00 Gerstley Borate
16.00 Nepheline Syenite
11.00 Kaolin
20.00 Whiting
32.00 Silica
Also add:
5.00 Tin Oxide
0.15 Chrome Oxide
RED/PINK; PURPLE/MAUVE where THICK
=== /==== ******/*******************
>From Don Goodrich list, When you apply thin , should be pink apply thick,
more toward purple. the very small amount of chrome, makes the tin, red. Too
much of it will give you a nice pale green.
I work with another glaze from this 'family',
LIGHT PURPLE (^5-6 OX)
23.7 frit 3134
7.5 nepheline syenite
15.7 whiting
32.2 flint
21 epk
add:
7.5 tin oxide
0.325 green chrome oxide
John Post:
I add 10 Alumina Hydrate , apply thick for rich mauve. Can do thick and
thin too.
Ababi Sharon
sharon@shoval.org.il
http://www.milkywayceramics.com/cgallery/asharon.htm
Dwiggins, Sandra (NCI) on tue 12 sep 00
Could you post this glaze again? I remember it, but don't have the
formula. Thanks,
Sandy
> -----Original Message-----
> From: Ron Roy [SMTP:ronroy@POP.TOTAL.NET]
> Sent: Tuesday, September 12, 2000 1:46 AM
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Re: Strange tale of the burgundy glaze gone pink
>
> I'm guessing - could it be the cooling - ruby crystals take some time to
> develop I am told.
>
> RR
>
> >This cone 6 glaze recipe was posted on Clayart some time ago and I have
> >tested it with these strange results. I first mixed it in a 100 gram
> test
> >batch, and got a beautiful dark burgundy glaze that pools a mottled
> >blue/purple. My husband then mixed me a 4000 gram batch, and when I
> >tested that the glaze was a much paler mauve - nice, but not what I was
> >looking for. It also pinholed some, and I was convinced he had mad a
> >mistake in the mixing. I thereupon mixed a new test - this time a 1000
> >gram batch - and got the original dark burgundy I was looking for. I
> just
> >mixed (very carefully) and tested a new 6000 gram batch and got the same
> >lighter mauve color - this time without the pinholes. It's actually not
> >bad, but not terribly to my taste. Maybe I'll fool around with some
> >cobalt oxide decoration. But does anyone have any ideas as to the cause
> >of this strange lightening of the glaze from small batch to large? Might
> >it have something to do with the tiny .15% of chrome ox? Should I add a
> >bit more of the Chrome, or was even less needed? Thanks for your
> >thoughts.
> >
> >Red, Purple Pink, Mauve
> >
> >Ger. Bor. 21
> >Neph. Sy. 16
> >E.P. K. 11
> >Whiting 20
> >Silica 32
> >
> >Tin 5
> >Chrome Ox. .15
> >
> >_________________________________________________________________________
> _____
> >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.
>
> Ron Roy
> 93 Pegasus Trail
> Scarborough
> Ontario, Canada
> M1G 3N8
> Evenings 416-439-2621
> Fax 416-438-7849
>
> __________________________________________________________________________
> ____
> 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.
Autumn Downey on tue 12 sep 00
I've found this glaze or a close relative to be rather unpredictable too -
suspect as Ron says, it is something to do with the firing/cooling. But
it has improved with age! Sitting around for a year or two really seems to
help. My glaze has gone from a stony pink to a shiny cranberry. Wonder if
ball milling some/all of the ingredients (whiting, tin and chrome) would
have sped up the process?) (Oh yes, some new elements in there too. Hmmm.)
Among the things that I've wondered about these more finicky glazes, is how
the size of the pot being glazed affects the outcome. Thicker pots absorb
glaze differently and probably heat and cool differently from other pots.
Any chance it's significant enough to account for some of the differences
in glaze appearance?
Autumn Downey
Yellowknife, NWT
At 12:46 AM 2000-09-12 -0500, you wrote:
>I'm guessing - could it be the cooling - ruby crystals take some time to
>develop I am told.
>
>RR
>
>>This cone 6 glaze recipe was posted on Clayart some time ago and I have
>>tested it with these strange results. I first mixed it in a 100 gram test
>>batch, and got a beautiful dark burgundy glaze that pools a mottled
>>blue/purple. My husband then mixed me a 4000 gram batch, and when I
>>tested that the glaze was a much paler mauve - nice, but not what I was
>>looking for. It also pinholed some, and I was convinced he had mad a
>>mistake in the mixing. I thereupon mixed a new test - this time a 1000
>>gram batch - and got the original dark burgundy I was looking for. I just
>>mixed (very carefully) and tested a new 6000 gram batch and got the same
>>lighter mauve color - this time without the pinholes. It's actually not
>>bad, but not terribly to my taste. Maybe I'll fool around with some
>>cobalt oxide decoration. But does anyone have any ideas as to the cause
>>of this strange lightening of the glaze from small batch to large? Might
>>it have something to do with the tiny .15% of chrome ox? Should I add a
>>bit more of the Chrome, or was even less needed? Thanks for your
>>thoughts.
>>
>>Red, Purple Pink, Mauve
>>
>>Ger. Bor. 21
>>Neph. Sy. 16
>>E.P. K. 11
>>Whiting 20
>>Silica 32
>>
>>Tin 5
>>Chrome Ox. .15
Paul Taylor on wed 13 sep 00
Dear Judy
Just a theory- My red glazes go pink if I do not grind them. This I put
down to the coarse nature of the tin . The glazes get darker with time as
well sloping round in the bucket.
-- Regards Paul Taylor.
Westport Pottery, Liscarney, County Mayo. Ireland.
http://www.anu.ie/westportpottery/
> From: Judy Musicant
> Reply-To: Ceramic Arts Discussion List
> Date: Thu, 7 Sep 2000 20:52:44 -0400
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Strange tale of the burgundy glaze gone pink
>
> This cone 6 glaze recipe was posted on Clayart some time ago and I have tested
> it with these strange results. I first mixed it in a 100 gram test batch, and
> got a beautiful dark burgundy glaze that pools a mottled blue/purple. My
> husband then mixed me a 4000 gram batch, and when I tested that the glaze was
> a much paler mauve - nice, but not what I was looking for. It also pinholed
> some, and I was convinced he had mad a mistake in the mixing. I thereupon
> mixed a new test - this time a 1000 gram batch - and got the original dark
> burgundy I was looking for. I just mixed (very carefully) and tested a new
> 6000 gram batch and got the same lighter mauve color - this time without the
> pinholes. It's actually not bad, but not terribly to my taste. Maybe I'll
> fool around with some cobalt oxide decoration. But does anyone have any ideas
> as to the cause of this strange lightening of the glaze from small batch to
> large? Might it have something to do with the tiny .15% of chrome ox? Should
> I add a bit more of the Chrome, or was even less needed? Thanks for your
> thoughts.
>
> Red, Purple Pink, Mauve
>
> Ger. Bor. 21
> Neph. Sy. 16
> E.P. K. 11
> Whiting 20
> Silica 32
>
> Tin 5
> Chrome Ox. .15
>
> ______________________________________________________________________________
> 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.
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