Greg Lamont on fri 24 oct 97
Hi Liz,
I'm not familiar with this glaze recipe, but if there's any tin oxide in the
recipe, that will react with the chrome to give pink to maroon. I use a
Cr/Sn glaze from Richard Burkett that calls for .15% Chrome oxide and 5% Tin
oxide and I get a great maroon color.
Greg
At 07:08 PM 10/23/97 EDT, you wrote:
>----------------------------Original message----------------------------
>Bonnie and I have been having a little off-list discussion about this maroon
>glaze called Kemp 17. Its come up before on this list, but its time to
>elevate this to the experts - Ron Roy or others and share with all again.
> Why is this chrome 6 oxidation glaze containing chrome a lovely maroon
>color?
>
>---------------------------------------------------------------------
>Previous discussion:
>
>Liz,
>
>I guess it's a chrome glaze in a boron base. boron from Gerstley Borate,
>but there is so little chrome in it! I've heard that in a glaze firing,
>if there are ANY glazes with chrome they will turn ANY glazes with boron
>pink, so maybe that's why there is so little chrome-- not any more
>needed. Did you post Ron Roy on this?
>
>Bonnie D. Hellman
>Pittsburgh, PA
>work email: oliviatcavy@juno.com
>home email: mou10man@sgi.net
>
>On Mon, 20 Oct 1997 10:02:47 oliviatcavy writes:
>>
>>From: Liz Dodge
>>To: Multiple recipients of list CLAYART
>>Subject: Re: Request for translucent maroon cone 6 (oxidation) recipe
>>Date: Fri, 17 Oct 1997 10:31:37 EDT
>>Message-ID: <199710171742.NAAAA25260@x6.boston.juno.com>
>>
>>----------------------------Original
>>message----------------------------
>>This glaze has been discussed on clayart previously. Its a really
>>nice gloss
>>cone 6 oxidation maroon/dark red (despite the description). Darker
>>where
>>thick, breaks to white where thin.
>>
>>Kemp 17 Red/Pink/Purple/Mauve
>>
>>Ingredient Percentage
>>
>>Nepheline Syenite 16
>>Whiting 20
>>Gerstley Borate 21
>>Kaolin 11
>>Silica 32
>>Tin Oxide 5
>>Chrome oxide 0.15
>>
>>
>>Liz Dodge
>>Berkeley, CA
>>
>>--------- End forwarded message ----------
>
>
>---------------------
>Forwarded message:
>From: oliviatcavy@juno.com
>To: LizzardOL@aol.com
>Date: 97-10-20 13:38:58 EDT
>
>Liz,
>
>I guess it's a chrome glaze in a boron base. boron from Gerstley Borate,
>but there is so little chrome in it! I've heard that in a glaze firing,
>if there are ANY glazes with chrome they will turn ANY glazes with boron
>pink, so maybe that's why there is so little chrome-- not any more
>needed. Did you post Ron Roy on this?
>
>Bonnie D. Hellman
>Pittsburgh, PA
>work email: oliviatcavy@juno.com
>home email: mou10man@sgi.net
>
>On Mon, 20 Oct 1997 10:02:47 oliviatcavy writes:
>>
>>From: Liz Dodge
>>To: Multiple recipients of list CLAYART
>>Subject: Re: Request for translucent maroon cone 6 (oxidation) recipe
>>Date: Fri, 17 Oct 1997 10:31:37 EDT
>>Message-ID: <199710171742.NAAAA25260@x6.boston.juno.com>
>>
>>----------------------------Original
>>message----------------------------
>>This glaze has been discussed on clayart previously. Its a really
>>nice gloss
>>cone 6 oxidation maroon/dark red (despite the description). Darker
>>where
>>thick, breaks to white where thin.
>>
>>Kemp 17 Red/Pink/Purple/Mauve
>>
>>Ingredient Percentage
>>
>>Nepheline Syenite 16
>>Whiting 20
>>Gerstley Borate 21
>>Kaolin 11
>>Silica 32
>>Tin Oxide 5
>>Chrome oxide 0.15
>>
>>
>>Liz Dodge
>>Berkeley, CA
>>
>>--------- End forwarded message ----------
>
Greg Lamont on fri 24 oct 97
Hi Liz,
I'm not familiar with this glaze recipe, but if there's any tin oxide in the
recipe, that will react with the chrome to give pink to maroon. I use a
Cr/Sn glaze from Richard Burkett that calls for .15% Chrome oxide and 5% Tin
oxide and I get a great maroon color.
Glaze name: Pink? Glaze
Cone: 4 - 5 - 6
Color: semi-opaque pink
Testing: Tested
Surface texture: shiny
Firing: Oxidation
Glaze type: Ca B
Recipe: Percent Batch
Gerstley Borate 0.68 1034
Nepheline Sye. 16.29 814
EPK 11.34 567
Whiting 19.52 976
Flint 32.16 1608
Totals: 100.00 % 5000 gm
add: 12% Deep Crimson Mason Stain, or .15% Green Chrome Oxide and 5% Tin
Oxide
Greg
At 07:08 PM 10/23/97 EDT, you wrote:
>----------------------------Original message----------------------------
>Bonnie and I have been having a little off-list discussion about this maroon
>glaze called Kemp 17. Its come up before on this list, but its time to
>elevate this to the experts - Ron Roy or others and share with all again.
> Why is this chrome 6 oxidation glaze containing chrome a lovely maroon
>color?
>
>---------------------------------------------------------------------
>Previous discussion:
>
>Liz,
>
>I guess it's a chrome glaze in a boron base. boron from Gerstley Borate,
>but there is so little chrome in it! I've heard that in a glaze firing,
>if there are ANY glazes with chrome they will turn ANY glazes with boron
>pink, so maybe that's why there is so little chrome-- not any more
>needed. Did you post Ron Roy on this?
>
>Bonnie D. Hellman
>Pittsburgh, PA
>work email: oliviatcavy@juno.com
>home email: mou10man@sgi.net
>
>On Mon, 20 Oct 1997 10:02:47 oliviatcavy writes:
>>
>>From: Liz Dodge
>>To: Multiple recipients of list CLAYART
>>Subject: Re: Request for translucent maroon cone 6 (oxidation) recipe
>>Date: Fri, 17 Oct 1997 10:31:37 EDT
>>Message-ID: <199710171742.NAAAA25260@x6.boston.juno.com>
>>
>>----------------------------Original
>>message----------------------------
>>This glaze has been discussed on clayart previously. Its a really
>>nice gloss
>>cone 6 oxidation maroon/dark red (despite the description). Darker
>>where
>>thick, breaks to white where thin.
>>
>>Kemp 17 Red/Pink/Purple/Mauve
>>
>>Ingredient Percentage
>>
>>Nepheline Syenite 16
>>Whiting 20
>>Gerstley Borate 21
>>Kaolin 11
>>Silica 32
>>Tin Oxide 5
>>Chrome oxide 0.15
>>
>>
>>Liz Dodge
>>Berkeley, CA
>>
>>--------- End forwarded message ----------
>
>
>---------------------
>Forwarded message:
>From: oliviatcavy@juno.com
>To: LizzardOL@aol.com
>Date: 97-10-20 13:38:58 EDT
>
>Liz,
>
>I guess it's a chrome glaze in a boron base. boron from Gerstley Borate,
>but there is so little chrome in it! I've heard that in a glaze firing,
>if there are ANY glazes with chrome they will turn ANY glazes with boron
>pink, so maybe that's why there is so little chrome-- not any more
>needed. Did you post Ron Roy on this?
>
>Bonnie D. Hellman
>Pittsburgh, PA
>work email: oliviatcavy@juno.com
>home email: mou10man@sgi.net
>
>On Mon, 20 Oct 1997 10:02:47 oliviatcavy writes:
>>
>>From: Liz Dodge
>>To: Multiple recipients of list CLAYART
>>Subject: Re: Request for translucent maroon cone 6 (oxidation) recipe
>>Date: Fri, 17 Oct 1997 10:31:37 EDT
>>Message-ID: <199710171742.NAAAA25260@x6.boston.juno.com>
>>
>>----------------------------Original
>>message----------------------------
>>This glaze has been discussed on clayart previously. Its a really
>>nice gloss
>>cone 6 oxidation maroon/dark red (despite the description). Darker
>>where
>>thick, breaks to white where thin.
>>
>>Kemp 17 Red/Pink/Purple/Mauve
>>
>>Ingredient Percentage
>>
>>Nepheline Syenite 16
>>Whiting 20
>>Gerstley Borate 21
>>Kaolin 11
>>Silica 32
>>Tin Oxide 5
>>Chrome oxide 0.15
>>
>>
>>Liz Dodge
>>Berkeley, CA
>>
>>--------- End forwarded message ----------
>
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