Yellow Matte

[Jeff Gieringer]

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

[Joan Worley/Jess McKenzie]

Nancy
Please let us know Mr. Dermer's response, especially about any spots like Jeff got.
Nice to know Dermer is still making pots, although his disappearance from Clayarts should have been a clue that he has better things to do. Good for him!
~j&j

Nancy Darm Kuefler said:

I just bought a mug from Dan Dermer a couple of weeks ago. Wonderful how our thoughts live on forever on the web. I plan to get in touch with him again in the next few weeks. His glazes are beautiful and I will ask him if he has continued to use this yellow recipe.

If anyone tries it, please let me know.

[Joan Worley/Jess McKenzie]

Jeff
We forgot to ask. Was this one fired in reduction?
If so, maybe this is what Hamer & Hamer call 'iron spot."
(at least we think there has to be reduction for this effect)
Here's a 13th century (Song) iron spot on black. These spots are admittedly a bit large.
http://www.cicadaasianart.com/gallery/Category/5/Item/213/Photos/
~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 Gieringer]

J&J,

This was fired ^6 oxidation. I'm going to try and get a couple of tests done in the next couple of weeks if I can. We're really busy right now trying to get ready for the Buyer's Market in Philly in 3 weeks. I have to put new elements in tomorrow. I'm over-joyed about that. :^)

Jeff

[RAM]

is this at all similar?

[Joan Worley/Jess McKenzie]

Please keep us posted, Nancy. The only spots we've seen like that are those Robby obtained with his version of the MC6G 'oatmeal" and those we see on the shocking shino, which has no manganese.
~j&j

Nancy Darm Kuefler said:

Dan is opening a studio/school in San Jose. I hope to see him in April when I go out to San Jose again, and will try to remember to ask him about this yellow glaze.

[Jeff Gieringer]

Haven't forgotten these tests or to post the results, but we have been slammed since the last part of Feb and trying to get caught up. Hopefully will get to start testing again in a couple of weeks.

Jeff

[Nancy Gallagher]

The top glaze looks like my dry yellow pumpkin (from Sankey Glaze Database) with a tinge of perhaps Vanadium. Below are some double walled S&P shakers with the dry yellow pumpkin glaze. I definitely get the iron specks with it.

[0730xl6atyct6]

Hi Nancy,  Not sure if you are still replying to this post but I love this dry yellow pumpkin glaze and am wondering if you would share the recipe with me.  Also - is it food safe.  I'm brand new to this website - so happy to find it...  any help with a nice matte - semi-matte light yellow glaze would be appreciated.  Love this one with the speckles.  Thanks Nancy - happy potting.   Beth

[Nancy Gallagher]

Recipe Name:  Dry Yellow Pumpkin

Cone:  6     Color:  straw yellow w/iron spccks
Firing:       Surface:  Matte

Amount     Ingredient
40          Kaolin--EPK
19          Dolomite
18          Frit--Ferro 3134
16          Spodumene--Foote
8          Silica

101         Total

               Additives
6          Rutile
14          Titanium Dioxide

Unity          Oxide
.092           Li2O
.095           Na2O
.011           K2O
.293           MgO
.509           CaO
1.000          Total

.554           Al2O3
.177           B2O3
.013           Fe2O3

2.222           SiO2
.004           TiO2
.001           P2O5

4          Ratio
63.6            Exp

Comments:  Toasty Orange-Rust where thicker, yellow where thinner. Slow cooling makes this glaze too matte.
-----------------------------------
Calculations by GlazeMaster™
www.masteringglazes.com
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[0730xl6atyct6]

Thanks so much Nancy.  You state that slow cooling makes this glaze too matte.  When I fire my skutt electric kiln I use a very simple program cone 6 - medium - no hold, and I just let it cool down to about 300 before I prop open the kiln a little.  Could you please explain to me what a slow cooling is and how I could avoid this as I do not want the glaze to be too matte.   Probably a really elementary question :)   Thanks for your help I so appreciate it.   

[0730xl6atyct6]

Thank you Nancy - I will try that.  Have a great day :)

Nancy Darm Kuefler said:

Hi Beth,

 

I don't have the recipe for this glaze, and don't have time to read through the whole thread right now, but Dan Dermer opened a studio/school in San Jose called Higher Fire. You could Google it and either email or call him and see if he would be willing to share what he knows. It is a beautiful glaze from the pictures.

 

Good luck!  Nancy

[Nancy Gallagher]

Some people program in a slow cooling program for matte glazes so that they intentionally build in a down ramp of say 125 degrees per hour cooling down to 1400 degrees before letting the kiln shut off by itself. This I found makes the DYP too chalky. If you just fire to cone 6 and let the kiln naturally cool like you're doing, it should be fine.