Hill Family on thu 1 jan 98
Hello fellow Clayarters!
My question to the group is two-fold.
1. My Raku pots appear over time to be re-oxidizing or at least the colour
of the finished pieces seems to change. This is most noticeable with glazes
containing a high proportion of copper. What can be done to stop this from
happening? The idea of sealing the surfaces with something seems to be the
answer, but, anything I've tried has changed the look of the glaze. Has
anyone found a suitable product?
2. I am also interested in sealing the inner surfaces of some of my Raku
work so it can be used to hold water. Any suggestions?
Thanks so much, and have a Happy and Prosperous New Year!
Dan.
Laura Conley on fri 2 jan 98
Regarding sealing the outside, there is a wonderful raku artist in Michigan, of
course I cannot remember his name at the moment, who, in an article published
in ceramic monthly, mentioned that he covers his pots in "brick sealant" to
prevent oxidation. I looked into this at home depot - it does come in matt
finish. I haven't bothered to try this though, since someone mentioned that
his pots oxidize anyway...
One question I have about this - doesn't sunlight oxidize the glaze chemicals
through all these potential coatings anyway?
Regarding sealing the inside, can you use a low fire black glaze on the inside
of the piece? I have only seen this done with one glaze base (on several
pieces), and it crazed significantly on that particular clay body. Has anyone
tried marine varnish? It is put on tables occasionally, so it might?????? be
okay for food?
Laura Conley
Boulder, Colorado
C Redding on sat 3 jan 98
Dan Hill asked:
2. I am also interested in sealing the inner surfaces of some of my Raku
work so it can be used to hold water. Any suggestions?
I read in a 1984 (month, I'm not sure of) issue of CM that Tompsons water
seal can waterproof Raku...I myself have never tried it, but I thought I"d
suggest it. :)
cookie
Frank Hartlieb on tue 6 jan 98
I have used KRYLON CRYSTAL CLEAR #1305 for many years and it seems to hold
up quite well. A thin application seems to do the job.
frank
hart9535@uidaho.edu
| |
|
