Ken Chin-Purcell on thu 9 nov 00
Alisa,
Where are you getting your Strontium from?
Irish suppliers don't seem to carry it...
-- Ken Chin-Purcell
----- Original Message -----
From: "Alisa and Claus Clausen"
To:
Sent: Thursday, November 09, 2000 8:26 PM
Subject: Glaze test for Rosenrot Red, cone 6 oxidation
> Source: Will Edwards
> Tested on white, finely grogged medium range stoneware, fired to 1220c
>
> Recipe
> 15 Frit 3134
> 15 Neph. Sye.
> 37 Flint
> 16 Whiting
> 15 EPK
> 2 Strontium carb.
> 5 Tin Oxide
> .35 Chorme Oxide
>
> For lack of Strontium, I made the first test with the following sub. for =
> Strontium:
> 2.66 Barium carb. for 2.0 Strontium, based on=20
> 100 gr. Barium carb. is equal to 74.8 gr. Strontium.
>
> Resulted in a wine red speckled glossy transparent, with a celery bluish =
> green cast under the speckles where thickest.
> Stable and very glossy.
>
> 2nd variation
> subbed 16 Whiting for
> 34.4 Wallastonite
> lowered 37 Flint to 20 Flint
> sub. based on Nigel Woods equation for subbing Wallostonite for Whiting
> (16 divided by 47) x 100 =3D 34.4 Wallastonite
> to find how much silica is added by the Wallostonite,=20
> 51.0 x .3404 =3D 17.36
>
> lowered the original silica by 17.0 giving the new version 20 gr. of =
> Silica
>
> Resulted in a very shiny clear base with a celery green cast overall. =
> Some red speckling
> and wine red where thickest in throwing rings.
>
>
> 3rd variation.
> Same as first sub. with Barium carb. for Strontium, and in addition =
> subbed the
> Tin ox. for zinc. oxide in equal portion.
> Resulted in a very shiny clear base with wine red speckling, celery =
> green cast where
> thickest, stable.
>
>
> Will test again when the strontium arrives and will test the newest =
> version with higher
> oxide precents.
>
> Best regards,
> Alisa in Denmark.=20
> Personally I best liked the celery green with the Walllosonite version.
>
> ______________________________________________________________________________
> 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.
>
Alisa and Claus Clausen on thu 9 nov 00
Source: Will Edwards
Tested on white, finely grogged medium range stoneware, fired to 1220c
Recipe
15 Frit 3134
15 Neph. Sye.
37 Flint
16 Whiting
15 EPK
2 Strontium carb.
5 Tin Oxide
..35 Chorme Oxide
For lack of Strontium, I made the first test with the following sub. for =
Strontium:
2.66 Barium carb. for 2.0 Strontium, based on=20
100 gr. Barium carb. is equal to 74.8 gr. Strontium.
Resulted in a wine red speckled glossy transparent, with a celery bluish =
green cast under the speckles where thickest.
Stable and very glossy.
2nd variation
subbed 16 Whiting for
34.4 Wallastonite
lowered 37 Flint to 20 Flint
sub. based on Nigel Woods equation for subbing Wallostonite for Whiting
(16 divided by 47) x 100 =3D 34.4 Wallastonite
to find how much silica is added by the Wallostonite,=20
51.0 x .3404 =3D 17.36
lowered the original silica by 17.0 giving the new version 20 gr. of =
Silica
Resulted in a very shiny clear base with a celery green cast overall. =
Some red speckling
and wine red where thickest in throwing rings.
3rd variation.
Same as first sub. with Barium carb. for Strontium, and in addition =
subbed the
Tin ox. for zinc. oxide in equal portion.
Resulted in a very shiny clear base with wine red speckling, celery =
green cast where
thickest, stable.
Will test again when the strontium arrives and will test the newest =
version with higher
oxide precents.
Best regards,
Alisa in Denmark.=20
Personally I best liked the celery green with the Walllosonite version.
Ron Roy on thu 16 nov 00
Hi Alisa,
Your first sub (barium for Strontium) is right on. The wolastonite sub is
way off - I'm doing it with Insight using the correct analysis for the
wolastonite I get.
Could be there is some variation in wolastonite - I'm under the impression
it's a pretty stable material (any info to the contrary is most welcome)
Perhaps Nigel is using the theoretical - almost always a mistake when
calculating.
If you have an analysis for your wolastonite I will check it out - just
send it aling and this same post.
RR
>Recipe
>15 Frit 3134
>15 Neph. Sye.
>37 Flint
>16 Whiting
>15 EPK
>2 Strontium carb.
>5 Tin Oxide
>.35 Chorme Oxide
>
>For lack of Strontium, I made the first test with the following sub. for
>Strontium:
>2.66 Barium carb. for 2.0 Strontium, based on
>100 gr. Barium carb. is equal to 74.8 gr. Strontium.
>
>Resulted in a wine red speckled glossy transparent, with a celery bluish
>green cast under the speckles where thickest.
>Stable and very glossy.
>
>2nd variation
>subbed 16 Whiting for
>34.4 Wallastonite
>lowered 37 Flint to 20 Flint
>sub. based on Nigel Woods equation for subbing Wallostonite for Whiting
>(16 divided by 47) x 100 = 34.4 Wallastonite
>to find how much silica is added by the Wallostonite,
>51.0 x .3404 = 17.36
>
>lowered the original silica by 17.0 giving the new version 20 gr. of Silica
>
>Resulted in a very shiny clear base with a celery green cast overall.
>Some red speckling
>and wine red where thickest in throwing rings.
>
>
>3rd variation.
>Same as first sub. with Barium carb. for Strontium, and in addition subbed the
>Tin ox. for zinc. oxide in equal portion.
>Resulted in a very shiny clear base with wine red speckling, celery green
>cast where
>thickest, stable.
>
>
>Will test again when the strontium arrives and will test the newest
>version with higher
>oxide precents.
>
>Best regards,
>Alisa in Denmark.
>Personally I best liked the celery green with the Walllosonite version.
>
>______________________________________________________________________________
>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
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