Best way to get crawling is with a thick application and a
lot of clay in the glaze. Also, the type of clay body can enhance
crawling, especially on the trimmed part. I am using a Mino
recipe right now. My personal change is using low melt spodumene
instead of regular. The calcined alumina oxide is expensive, but I
have tested alumina hydrate and it doesn't work. You can find all of
John Britt's high alumina shinos here:
or here:
The different styles of bowls from different places used
different clay. The original Japanese shinos used a clay with high
alumina content called Mogusa clay. I have fired it to cone 13
twice, and the clay is still non-vitreous. But the multiple firings
makes the glaze seal, like in the case of earthenware. Tea masters
like this clay because it makes a soft ringing sound just like raku
bowls do when the whisk is used in it.
Mogusa only has a little iron in it. Wet, it looks like the
flesh colored crayola crayon. I wedge in a little iron clay into a
light colored fireclay body and then wedge in sagger clay, which has a
high alumina content. When you trim with this mix, which is a
little short, you get those nicely textured feet.
--
--
Lee Love in Minneapolis
http://mingeisota.blogspot.com/
"The intuitive mind is a sacred gift and the rational mind is a
faithful servant. We have created a society that honors the servant
and has forgotten the gift." -- Albert Einstein
Sorry! That a problem with initials. But, also, folks mistake me
for a her because of my name. I like it, because you are not being
treated as a stereotype.
Lee