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## crystalline glazes - macro vs micro question - ababi

### George Koller on mon 29 sep 03

Hi Again,

I have now run across a number of "low fire crystalline" glaze formulas=20
(^04)that come from: Crystalline Glazes by Diane Creber to ClayArt by =
way
of Ababi in a 1 May, 2000 archived thread. =20

Her book is now ordered...=20

Regarding the list there is one ingredient that was labeled just lower
case "irn".... =20

<< repeated here:
AVENTURINE CONAND^04(G131)=20
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=20
BORAX............... 57.28 57.75%=20
irn................. 14.14 14.26%=20
BORIC ACID.......... 3.50 3.53%=20
coblt c............. 0.04 0.04%=20
COPPER CARBONATE.... 0.02 0.02%=20
QUARTZ.............. 22.40 22.59%=20
WOLLASTONITE........ 1.80 1.81%=20
=3D=3D=3D=3D=3D=3D=3D=3D=20
99.18=20
>>

any ideas what "irn" is? Ababi?

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=

Now, also, I'm making an assumption, that if these glazes are =
formulated
for "macro" that they will also somehow be good for "micro-crystalline"=20
formations....

Does this make sense, some sense? Is this totally wrong? =20

Again, what we are doing is dispensing Iron and other metals by way of
the sulfates and citrates to a base glaze. Where we have saturated it =
with
Iron/copper/chromium/nickel is where we have seen and want to see =
modest=20
and interesting - but not macro crystalline growth. Our immediate =
interest
is in a light green from Iron.

### Liz Willoughby on mon 29 sep 03

Hello George,
My guess is that since it is an Aventurine glaze, and that it is a
typo error, and the ingredient "irn" is iron.
Liz from Grafton
>
>I have now run across a number of "low fire crystalline" glaze formulas
>(^04)that come from: Crystalline Glazes by Diane Creber to ClayArt by way
>of Ababi
>
>Regarding the list there is one ingredient that was labeled just lower
>case "irn"....
>
>AVENTURINE CONAND^04(G131)
>==========================
>BORAX............... 57.28 57.75%
>irn................. 14.14 14.26%
>BORIC ACID.......... 3.50 3.53%
>coblt c............. 0.04 0.04%
>COPPER CARBONATE.... 0.02 0.02%
>QUARTZ.............. 22.40 22.59%
>WOLLASTONITE........ 1.80 1.81%
>========
>99.18
>any ideas what "irn" is? Ababi?

--
Liz Willoughby
RR #1
2903 Shelter Valley Rd.
Grafton, Ontario
Canada
K0K 2G0
905-349-3130

lizwill@phc.igs.net

### Ababi on tue 30 sep 03

Did I send a recipe from a book? What a shame!
It must be iron but I shall look tomorrow the book is in the studio.

Ababi.

### william schran on tue 30 sep 03

George asks: >any ideas what "irn" is?<

The irn is iron oxide and the ^04 glaze is an aventurine glaze. It is
a microcrystalline glaze that will benefit from slow cooling. A
rather thick application is also advisable, but take care to protect
from possible running of the glaze.
Bill