Dale Neese on thu 20 dec 07
Last week after a class demo I was taking a short break and thumbed through
the book "Chinese Stoneware Glazes," ancient glazes re-created for today's
potter, by Joseph Grebanier. The author was describing the Chinese crackle
glazes, his modern method of using ink to darken the crackle but then he
also described the ancient Chinese method of staining the crackle glaze.
Best I can remember was to "boil the glazed bowls in a vat of pig fat for
several hours, then submerge them in the most putrid and fowl sewer for
several months......."
I thought,,the ink is better.
Dale Tex
"across the alley from the Alamo"
San Antonio, Texas USA
Jacqueline Miller on thu 20 dec 07
I have taken a pot with a fired crackle glaze and covered it with a
contrasting color glaze getting the second glaze into the cracks, wiping the
surface and refiring. Would it be assumed that the cracks have now been
filled in and fine for food by even the higher standards?Jackie
--
Jackie Miller
JackieAMiller@gmail.com
Earl Brunner on thu 20 dec 07
No.
If you are going by that standard ,then your crackle glaze has most likely crazed again, even if you can't see it. Reheating the glaze is not likely to change the difference in co-efficients of expansion between clay and glaze that caused the glaze to craze in the first place.
Earl Brunner
Las Vegas, NV
----- Original Message ----
From: Jacqueline Miller
To: CLAYART@LSV.CERAMICS.ORG
Sent: Thursday, December 20, 2007 10:52:32 AM
Subject: blackening crackle glazes
I have taken a pot with a fired crackle glaze and covered it with a
contrasting color glaze getting the second glaze into the cracks, wiping the
surface and refiring. Would it be assumed that the cracks have now been
filled in and fine for food by even the higher standards?Jackie
--
Jackie Miller
JackieAMiller@gmail.com
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Ron Roy on fri 21 dec 07
You can check for crazing on a dark glaze using steam - the water will
evaporate last from the cracks and you will see them easily.
You will find the glaze will re craze in different places.
RR
>I have taken a pot with a fired crackle glaze and covered it with a
>contrasting color glaze getting the second glaze into the cracks, wiping the
>surface and refiring. Would it be assumed that the cracks have now been
>filled in and fine for food by even the higher standards?Jackie
>
>--
>Jackie Miller
>JackieAMiller@gmail.com
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Brian Crocker on sat 22 dec 07
Greetings Ron,
I use Black "On Glaze" rubbed into the cracks and then fire it in. If it is
allowed to build up, it looks really good.
Kind regards,
Brian, slangivan@dodo.com.au
===================================== {;-)
----- Original Message -----
From: "Ron Roy"
To:
Sent: Friday, December 21, 2007 3:43 PM
Subject: Re: blackening crackle glazes
> You can check for crazing on a dark glaze using steam - the water will
> evaporate last from the cracks and you will see them easily.
>
> You will find the glaze will re craze in different places.
>
> RR
>
>>I have taken a pot with a fired crackle glaze and covered it with a
>>contrasting color glaze getting the second glaze into the cracks, wiping
>>the
>>surface and refiring. Would it be assumed that the cracks have now been
>>filled in and fine for food by even the higher standards?Jackie
>>
>>--
>>Jackie Miller
>>JackieAMiller@gmail.com
>
> Ron Roy
> RR#4
> 15084 Little Lake Road
> Brighton, Ontario
> Canada
> K0K 1H0
>
> ______________________________________________________________________________
> Clayart members may send postings to: clayart@lsv.ceramics.org
>
> You may look at the archives for the list, post messages, or change your
> subscription settings here: http://www.acers.org/cic/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots2@visi.com
>
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