What is the firing range of your low fire clay? How thoroughly wedged is
your clay? Is there any plaster in you clay or glaze? Did you rinse the
bisque fired clay artworks with water to remove any dust any dust that
may have settled in or on the pieces? Did you thoroughly dry these
water rinsed pieces before you glazed them? Are you putting two thin
coats of glaze on your pieces or one thick coating? Have you or your
students handled them a lot ?.... the oils/moisture from all of your
hands sometimes will stop the glaze from adhering to the clay long
enough to be glaze fired sort of like wax resist will do. Have you done
a witness cone trial to check your digital thermocouple for
accuracy---most are very accurate so I don't think that is your problem,
but it could be a problem. Hopefully this will help you identify your
Patrick on the Puget Sound
From: Aartteachr@aol.com [mailto:Aartteachr@aol.com]
Sent: Tuesday, May 17, 2005 12:32 PM
To: TeacherArtExchange Discussion Group
Subject: Re: [teacherartexchange] kiln settings- glaze chips?
In a message dated 5/15/2005 1:37:35 PM Eastern Standard Time,
We are both usually using low fire clay bodies and low fire glazes.
She has now moved to bisque firing to 03, and glaze firing to 06, and
has had better results. We both have fairly new kilns (Skutt and
Cress) with digital controls.
Has anyone else had this experience? What have you tried? I will
definitely be following in her footsteps, but it occurred to me that
we are probably not the only ones to have experienced this...and
other people may have additional info or suggestions.
I have had the same problem recently with my last few fires. I had
changed my clear glaze brand ...then this happened. My clay was worked
the same, the firing was the same at 06 and nothing was different except
the clear glaze. I'd like to know also what caused this too.