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crystal glaze firing

updated fri 4 sep 98

 

Al Pfeiffer on mon 31 aug 98

I would like to experiment some with some crystal glazes which cover the
entire form and am concerned about the glaze runoff. Do you make a "cookie"
of some higher temp clay to go under the piece and collect the excess? If so,
I fire at C7 - would the cookie be a C10 clay? Do you put it under the glazed
bisque as a bisque piece or a fired to maturity piece? Presumably you knock
it off after the firing and grind the excess glass? I really hate grinding
shelves - any help would be greatly appreciated! Al Pfeiffer outside of
wonderful Ra-cha-cha (Rochester), N.Y.

Robert J. MOORE on tue 1 sep 98

------------------
Al,
I use a type of saucer , under the pot being glazed. Got the idea from Ian
Currie's book 'Stoneware Glazes'.
I bisque at 06 and use it in bisque form. The inside ring ( that normally =
would
encircle a cup) should elevate the glazed piece allowing for glaze runoff. =
Coat
the top of the inside ring with kiln wash so the saucer does not adhere to =
the
glazed piece. There should be a raised lip on the outside rim of the saucer =
to
hold in glaze runoff.
I would be interested to know if you get positive results at cone 7. My =
firings
have been to cone 10 with varied results.
Let me know if need more info..

=3E=3E=3E Al Pfeiffer =3CKYSOCKSOFF=40aol.com=3E 08/31 10:29 AM =3E=3E=3E
----------------------------Original message----------------------------
I would like to experiment some with some crystal glazes which cover the
entire form and am concerned about the glaze runoff. Do you make a =
=22cookie=22
of some higher temp clay to go under the piece and collect the excess? If =
so,
I fire at C7 - would the cookie be a C10 clay? Do you put it under the =
glazed
bisque as a bisque piece or a fired to maturity piece? Presumably you knock
it off after the firing and grind the excess glass? I really hate grinding
shelves - any help would be greatly appreciated=21 Al Pfeiffer outside of
wonderful Ra-cha-cha (Rochester), N.Y.

Robert. Moore
rjmoore2=40iusmail.ius.indiana.edu

Sherry Lutz on thu 3 sep 98

I took a class on crystal glazes with Don Holloway of
Monroe, La. It was very good, so good I've gone in that direction myself.
He's coming out with a book and
I think it would be very helpful to those of you trying to
get into crystalline glazing. The advertisement is coming out in the October
issue of Ceramics Monthly. If you want to contact him directly, his address
is:
Crosscraft Enterprises
18 Jana Dr.
Monroe, La. 71203
The whole process from forming the pots and catchbowls through the firing
process can be complicated. I understand the book is more of a workbook, not
just pretty pictures.
-----Original Message-----
From: Al Pfeiffer
To: CLAYART@LSV.UKY.EDU
Date: Monday, August 31, 1998 9:30 AM
Subject: crystal glaze firing


>----------------------------Original message----------------------------
>I would like to experiment some with some crystal glazes which cover the
>entire form and am concerned about the glaze runoff. Do you make a
"cookie"
>of some higher temp clay to go under the piece and collect the excess? If
so,
>I fire at C7 - would the cookie be a C10 clay? Do you put it under the
glazed
>bisque as a bisque piece or a fired to maturity piece? Presumably you
knock
>it off after the firing and grind the excess glass? I really hate grinding
>shelves - any help would be greatly appreciated! Al Pfeiffer outside of
>wonderful Ra-cha-cha (Rochester), N.Y.