The Brinks on wed 3 may 00
Hi Diane,
I've never heard of this before but your question may tie in with something
I've been meaning to ask the group about. A few years ago, I picked up a
few pebbles in western New Mexico because the color was similar to yellow
ochre. When I got home I pulverized one of the pebbles- it was fairly soft-
and mixed a little of the powder into some clear glaze and tried it on test
tiles. I was amazed to see grass green spots the next day! Not a copper
green at all, but clear green, with a hint of yellow. This was cone 7
oxidation by the way. I hadn't ground it fine, so the green was spotty,
instead of smoothly distributed. I've looked in some Rock and Mineral books
I have, but couldn't really tell what color chromite ore is. I would be
interested to hear the results if you test this oxide. If it fires green,
maybe my pebbles are in the chrome family...can't think what else would fire
strong green.
Ann Brink in CA...I was going to turn Clayart off for several weeks because
we're going on a trip to Tennessee, but now I'll want to read responses on
this subject, so will check in with the laptop. If we see any potters
studios on Rt. 40, we'll stop and ask if you're on Clayart!
----- Original Message -----
From: Diane Karmiol
To:
Sent: Tuesday, May 02, 2000 11:49 AM
Subject: Yellow Chrome Oxide
> ----------------------------Original message----------------------------
> I just came across a whole containter of 'Yellow Chrome Oxide'. Has anyone
> every done anything with it?
> It is a screaming bright yellow. I don't know a thing about it but would
love
> to try it. Any information would be appreciated.
> TIA
> Diane in Miami
>
Scott North on thu 4 may 00
Hi Ann,
There is a possibility that your pebbles were some type of uranium
ore mineral. Some of them are yellow, some are found in New Mexico, and I
have fired some to cone 10 under a clear glaze with green/yellow results.
If you have access to a geiger counter (maybe local college), your pot
should still give a reading, or the pebbles if you still have some intact.
Just a possibility. Good luck. Scott
Scott C. North
Geology Department
Humboldt State University
Arcata, CA 95521
phone: (707) 826-3210
FAX: (707) 826-5241
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