Richard Mahaffey on mon 21 aug 06
Hello,
There is a use I am aware of in California. In 1967 I worked in a
Service station, you know, pump gas, check the oil, tire pressure and so
forth (this really happened it is not an urban myth). I aslo worked in
the shop doing oil changes, brake jobs, tune ups and so forth. We would
clean the floor of the shop by wet moping with solvent and then
spreading Grease Sweep over the solvent. We would then sweep the floor
with the Grease Sweep which was Rice Hull Ash. It did a great job. I
recently ( a couple of years ago) bought Grease Sweep in Tacoma,
Washington for use as a glaze material. It is not too expensive.
The ash in Grease Sweep comes from California where they grow more rice
than most Asian countries individually grow.
Rick Mahaffey
Paul Herman on tue 22 aug 06
Danny,
The quartz is different from the rice hull ash. It's crystalline
silica (quartz, very pure, 99.9%), versus ash that is mostly opaline
silica. A different critter altogether. The only way to tell the
difference is to test them, but there is a difference.
As for the value of one over the other, you can't see it because you
haven't tested the stuff. I'm sure that differences would show up in
the tests. You might find the ash melts easier than quartz.
One of the characteristics of ash is the little added elements. Some
of those little additions can be strong fluxes, like K2O, Na2O, CaO,
etc. Though rice hull ash may be high in silica, it's nothing like
99.9%.
Good testing,
Paul Herman
Great Basin Pottery
Doyle, California US
http://greatbasinpottery.com
On Aug 22, 2006, at 12:17 AM, Danny Floyd wrote:
> but at the moment I myself cant see any value in using Rice Husk
> Ash if you
> have ready access to quartz.
Danny Floyd on tue 22 aug 06
Hi Rick,
Thank you for the info. on CleanSweep. Useful to know and maybe the future
but at the moment I myself cant see any value in using Rice Husk Ash if you
have ready access to quartz. Oh and about your comment 'The ash in Grease
Sweep comes from California where they grow more rice than most Asian
countries individually grow' during my search I found statistics on rice
production. The main producers, along with the % of global production, are
China (31), India (21), Indonesia (8), Bangladesh (7), Vietnam (5),
Thailand (5), Myanmar (4), Philippines (2), Japan (2), Brazil (2), USA (2)
Thanks
Danny
Lee Love on tue 22 aug 06
On 8/21/06, Richard Mahaffey wrote:
-
> The ash in Grease Sweep comes from California where they grow more rice
> than most Asian countries individually grow.
Yeah, but it does it taste any good? ;^)
I just heard today that American long grain rice is
contaminated with genetically engineered rice. It is banned in the
EU. Read more here:
http://www.guardian.co.uk/food/Story/0,,1855542,00.html
--
Lee in Mashiko, Japan
http://potters.blogspot.com/
"Let the beauty we love be what we do." - Rumi
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