Alisa Liskin Clausen on sun 8 sep 02
Glaze test for Crystal Glaze, Mocha/Gray cone 6 ox.
Glaze tested on white midrange stoneware fired in electric oxidation to =
1220c.
Source:
Credited to:
Firing ramp:
100c up/he to 600c (212f - 1112f)
150c up/he to 1100c (330f - 2012f)=20
100c up/he to 1220c (212f - 2228f)
cool down max. per hour to 1100c=20
cool 80c per hour to 800c
shut off kiln
Recipe:
1.0 Kaolin
22 Flint
28.5 Zinc oxide
48.5 Borax Frit
ADD
8 Rutile
2 RIO
0.5 Cobalt Carb.
Note: All raw materials are measured up or down to the nearest whole =
decimal. =20
Colorants or additives to a 100 gram test batch are measured in percent =
to the 100 gram test batch.
Substitutions: None
Results:
A fluid gloss glaze with a mocha ground with white and grey streaking. =
Pooling has deeper brown color with streaking.
Did not produce crystals in this test but otherwise a very decorative =
glaze for rims or bowl interiors.
Regards from Alisa in Denmark
Ron Roy on thu 12 sep 02
This hardly deseves to be called a glaze - way low in both silica and
alumina - I tried it with several boron frits and the story was always bad
news in terms of stability - zinc is way over supplied - try some orange
juice after it has been close to this glaze for 15 min.
RR
>Glaze test for Crystal Glaze, Mocha/Gray cone 6 ox.
>Glaze tested on white midrange stoneware fired in electric oxidation to 1220c.
>
>Source:
>Credited to:
>
>Firing ramp:
>100c up/he to 600c (212f - 1112f)
>150c up/he to 1100c (330f - 2012f)
>100c up/he to 1220c (212f - 2228f)
>cool down max. per hour to 1100c
>cool 80c per hour to 800c
>shut off kiln
>
>Recipe:
>1.0 Kaolin
>22 Flint
>28.5 Zinc oxide
>48.5 Borax Frit
>
>ADD
>8 Rutile
>2 RIO
>0.5 Cobalt Carb.
>
>Note: All raw materials are measured up or down to the nearest whole
>decimal.
>Colorants or additives to a 100 gram test batch are measured in percent to
>the 100 gram test batch.
>
>Substitutions: None
>Results:
>A fluid gloss glaze with a mocha ground with white and grey streaking.
>Pooling has deeper brown color with streaking.
>Did not produce crystals in this test but otherwise a very decorative
>glaze for rims or bowl interiors.
>
>Regards from Alisa in Denmark
>
>______________________________________________________________________________
>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
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Ababi on thu 12 sep 02
It may be a crystal glaze Ron,
but with frit 3110
and holding at 1055 or so 1-3 hours
Foodsafe? Stable? Cannot be with the very high zinc and 0.1-0.4 mole of alumina.
To Alisa.
You make so many and so interesting tests. I have the feeling that you take the
materials like they were names. Borax frit for borax frit
one can be high sodium the other high lead and the third high alumina. You get
interesting results you make new glazes, but if we write about traveling glazes, I think
you miss it!
Your Middle Eastern fan!
Ababi
---------- Original Message ----------
>This hardly deseves to be called a glaze - way low in both silica and
>alumina - I tried it with several boron frits and the story was always bad
>news in terms of stability - zinc is way over supplied - try some orange
>juice after it has been close to this glaze for 15 min.
>RR
>>Glaze test for Crystal Glaze, Mocha/Gray cone 6 ox.
>>Glaze tested on white midrange stoneware fired in electric oxidation to 1220c.
>>
>>Source:
>>Credited to:
>>
>>Firing ramp:
>>100c up/he to 600c (212f - 1112f)
>>150c up/he to 1100c (330f - 2012f)
>>100c up/he to 1220c (212f - 2228f)
>>cool down max. per hour to 1100c
>>cool 80c per hour to 800c
>>shut off kiln
>>
>>Recipe:
>>1.0 Kaolin
>>22 Flint
>>28.5 Zinc oxide
>>48.5 Borax Frit
>>
>>ADD
>>8 Rutile
>>2 RIO
>>0.5 Cobalt Carb.
>>
>>Note: All raw materials are measured up or down to the nearest whole
>>decimal.
>>Colorants or additives to a 100 gram test batch are measured in percent to
>>the 100 gram test batch.
>>
>>Substitutions: None
>>Results:
>>A fluid gloss glaze with a mocha ground with white and grey streaking.
>>Pooling has deeper brown color with streaking.
>>Did not produce crystals in this test but otherwise a very decorative
>>glaze for rims or bowl interiors.
>>
>>Regards from Alisa in Denmark
>>
>>______________________________________________________________________________
>>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
>RR#4
>15084 Little Lake Road
>Brighton, Ontario
>Canada
>K0K 1H0
>Phone: 613-475-9544
>Fax: 613-475-3513
>______________________________________________________________________________
>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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