I have been working on a yellow matte glaze. One of our interns left a bucket of glaze and it looks like the glaze on the apple baker. I have been trying to repeat the glaze and the small ikebana form is as close as I have come. I know it's an iron based yellow as the glaze is red in the bucket. The intern was heading out west and I have not been able to find her. Does anyone have any idea what I could add to mine to make it more yellow? I'm thinking some rutile. Thanks for any advice.

Jeff



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It is a ^6 oxidation glaze. I'm getting closer, but can't quite get the yellow to come out.

Jeff
Highwater's Red Rock

Nancy Darm Kuefler said:
Love it. Reminds me of a ^10 Bird Matte. What kind of clay?
We certain you've thought of vanadium. But how does it act with iron in the glaze?
If iron is present, wouldn't a better bet be Val Cushing's Tenmoku Gold?
Zoophagous posted a recipe on our TeaDust Forum.

http://cone6pots.ning.com/forum/topics/tea-dust-glaze?id=2103784%3A...

~joan worley and jess mckenzie
Here's something more on Val's Tenmoku Gold

http://www.frogpondpottery.com/glazestability/glaze0013.html

Please let us all know how this comes out.
~j&j
J&J,

The bottom picture above has 2% Vanadium in it. I didn't know whether to add more Vanadium or try Ochre. Thought about rutile. The unknown glaze in the bucket is iron red, so I don't know what makes it yellow on the pot.

Jeff
Could chromium be in it, or some kind of Vanadium Zirconian Stain, or a Praseodymium Stain? I just looked up any compound that would turn a glaze yellow. The Praseodymium Stain seems like the best choice if the rutile option dosent work out because it is best in oxidation, and for some reason I feel like there might be a small amount of tin in the glaze.... Also, I have noticed that .1% cobalt carb is usually in most of the yellow glazes I have been looking at from various sites (never tested any, or saved any recipes)
You might want to look at some of Alisa Clausen's photos, if you haven't already.
See
http://tinyurl.com/yz6luwa
which should show you V's Tenmoku Gold that's full of pyroxene (we guess) crystals.

But click also to the right on
iron,Ochre, Browns ^6 Ox (Set)
There's one called 'Dry Pumpkin' that might look yellow on your Red Rock.
Just a WAG
~j&j
J&J

Thanks again, I have tested Alisa's Dry Pumpkin and the Butterscotch, but don't get the iron spots with them. But looking at the recipes again has given me a couple of ideas to try in mine.

Jeff
Please keep us posted. We love a mystery.
BTW, we're not familiar with that clay body--we thought the spots came from it, not the glaze, given your second photo.
This has been a great lesson on the importance of keeping a notebook, as well as good labels. Perhaps she was a good intern in other respects.
j&j
Jeff Gieringer said:
J&J

Thanks again, I have tested Alisa's Dry Pumpkin and the Butterscotch, but don't get the iron spots with them. But looking at the recipes again has given me a couple of ideas to try in mine.

Jeff
One last shot. (We keep running across these):

See the discussion--especially the Dan Dermer msg-- at

http://www.potters.org/subject27988.htm

There's some talk about crystals, but they don't seem to say what color those are.

Good luck...~j&j
J&J,

The spots do come from the glaze, that's why I couldn't understand why they didn't show up with Alisa's 2 glazes. I'll keep you updated as we continue our testing.

Jeff


Joan Worley/Jess McKenzie said:
Please keep us posted. We love a mystery.
BTW, we're not familiar with that clay body--we thought the spots came from it, not the glaze, given your second photo.


Jeff
We hope you do keep us updated. It is truly a mystery--if you strain that glaze and find find lots of mm-size hunks of rust we won't be a bit surprised...;-)
~j&j

Jeff Gieringer said:
J&J,

The spots do come from the glaze, that's why I couldn't understand why they didn't show up with Alisa's 2 glazes. I'll keep you updated as we continue our testing.

Jeff


Joan Worley/Jess McKenzie said:
Please keep us posted. We love a mystery.
BTW, we're not familiar with that clay body--we thought the spots came from it, not the glaze, given your second photo.


Jeff

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