Marni Turkel on fri 24 oct 97
I have a customer who wants me to make a lot of inexpensive votive-type
candle holders, glazed atleast on the inside. Approximate size 2.75" tall
and 2.5" high. I cast a porcelaneous cone 5 body, fired in electric for my
regular line of work and don't want to use a different clay body for this
project. (Life is hard enough without keeping track of different clays.) I
have never done any single fire work, but this sounds like the place to
give it a try if I decide to take on the project.
I would appreciate any advice on single firing, but especially suggestions
for what to look for in a glaze or possible adjustments to alter glazes for
single firing.
Marni Turkel
Stony Point Ceramic Design
Sonoma County, California
Marni Turkel
Stony Point Ceramic Design
Sonoma County, California
Steve Mills on sun 26 oct 97
Marni,
Generally if a glaze has a fairly high clay content it'll work OK in single
fire. If the clay content is low or borderline add approx. 3% bentonite .
This has worked for me as a general rule. (I work at cones 8-9) If the glaze
is more like a slip, I glaze when the work is leather hard, if not, I glaze
when bone dry.
Good luck
Steve
SteveMills
Bath
UK
Susan Ammann on thu 30 oct 97
Hi Marni,
I single fire all my work using porcellaneous stoneware (^10 b-mix)
and cut-out candle holders are as easy as anything else.
When the freshly thrown pot is just dry enough to handle, I glaze
the inside, wait for the glaze to dry enough to turn the pot over,
then wait for the clay to get to leather hard. Then I cut out my
design and trim the bottom. If you're only going to glaze the inside
then that's the end of it.
I've been single firing for about 15 years and can't remember back
to the details of learning how. I use glazes out of ceramics
monthly, various texts, and sometimes even off clayart. They mostly
work just as is, but I do add about 3-5% bentonite to all my glazes.
Just remember to handle your pots very gently, and allow the glaze
to dry completely between coats.
Good luck.
Susan Ammann
ammann@newmex.com
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