Tom Buck on wed 7 jun 00
Kurt Wild suggests the use of Tung Oil as a sealant for raku and
earthernware pots.
Tung Oil (aka China-wood oil) is a yellow "drying" oil that is
used to make superior varnishes. It has a very high flash point (552 oF)
so it is relatively safe to use. The oil is derived from seeds of a tree
that originated in China & Japan but now is grown in USA too. Tung Oil is
80% eleostearic acid, which will form a solid resin on exposure to air
(oxygen).
As oil, this material is quite fluid and if placed in a porous pot
the oil will penetrate well into the interior pores, then slowly be
oxidized into a hard polymer (resin) and seal the pot from the inside
out. So Kurt's use of Tung Oil makes a lot of sense.
til later.Peace. Tom B.
Tom Buck ) tel: 905-389-2339
(westend Lake Ontario, province of Ontario, Canada).
mailing address: 373 East 43rd Street,
Hamilton ON L8T 3E1 Canada
---------- Forwarded message ----------
Date: Tue, 6 Jun 2000 00:28:50 -0400 (EDT)
From: Tom Buck
To: Kurt Wild
Subject: Re: Raku-waterproof
Kurt
the Tung Oil is a classic "drying oil" used in highgrade varnishes. The
oil itself is fluid enough to penetrate right into the interior pores of a
biscuit, and stay there, slowly oxidizing into a hard polymer, thus
water-sealing the pot. So, your use of TO is eminently sound.
til later. Peace. Tom.
Tom Buck ) tel: 905-389-2339
(westend Lake Ontario, province of Ontario, Canada).
mailing address: 373 East 43rd Street,
Hamilton ON L8T 3E1 Canada
Lee Love on thu 8 jun 00
Here in Japan, they use liquid silicone to line the inside of vases.
--
Lee Love
2858-2-2 , Nanai , Mashiko-machi ,Tochigi-ken 321-4106 JAPAN
Ikiru@kami.com Voice Mail and Faxes (a USA number): (303) 256-0374
Help E.T. Phone Earth: http://setiathome.ssl.berkeley.edu/
Veena Raghavan on fri 9 jun 00
Hi Lee,
I was chuckling when I read your post last night about liquid
silicon. Here we are, all trying to find a "natural" more Japanese way of
waterproofing raku, and the Japanese are using silicon. Don't know if
anyone else reacted the same way, but I thought it very ironic. Sometimes
we just try too hard?!
All the best.
Veena
Lee Love on sun 11 jun 00
----- Original Message -----
From: Veena Raghavan <75124.2520@COMPUSERVE.COM>
| Hi Lee,
| I was chuckling when I read your post last night about liquid
| silicon. Here we are, all trying to find a "natural" more Japanese way of
| waterproofing raku, and the Japanese are using silicon. Don't know if
| anyone else reacted the same way, but I thought it very ironic. Sometimes
| we just try too hard?!
Hi Veena, I don't know if they use it on raku. I just know they use it
on stoneware, non food related vases.
Yes, Japan is a bizarre mix of new and old. There is much charm
in this. Last week, we made about 4 or 5 runs in the small K Truck to
pick up some local clay that is processed by a local person. After we
loaded up one of the loads, I checked out some of the equipment, which
included some crude pounding machines. They made me think of the ones I've
seen in photos of Onta, that are powered by water wheels. Except these
were run by an electric motor. There were also some home built conveyer
belts and augers.
But the thing that interested me the most, was the hard clay that
covered part of the driveway. It occurred to me that part of the
processing of this clay (that is dug locally, out of the ground) is that the
dried out chunks of this stuff are laid out in the drive to be rolled over
by the tires of a car or truck. It explained to me why I sometimes find
plum pit sized stones in my clay. :^)
But this Mashiko clay seems to be alive. It isn't like the clay I
used back home, that is made from industrial, powdered ingredients. Those
rocks in my clay aren't junk, they are character. :^)
--
Lee Love
Nanai , Mashiko-machi ,Tochigi-ken 321-4106 JAPAN Ikiru@kami.com
Voice Mail and Faxes (a USA number): (303) 256-0374
Help E.T. Phone Earth: http://setiathome.ssl.berkeley.edu/
| |
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