Wednesday, March 23, 2011

Cone 6 Glazes / 6號錐氧化燒

On my previous post, I mentioned that two glazes on my tea pot – Orange Street and Creamy Rust are in Mastering Cone 6 Glazes. I think I was wrong. A blog reader couldn’t find the recipes from that book.
Here are the two glaze recipes I would like to share.
Just a friendly reminder!! Cone 6 glazes react to work-heat ratio slightly different from the cone 10 glazes. A different firing program could change how the glaze turned out from firing. Always run some tests on smaller pieces before you use them on your “real” works.
I fired my works in Cone Art kiln (have I ever mentioned that Cone Art is my favorite kiln since I was working for the porcelain company in Taiwan : ) with fast glaze program and hold at cone 6 for 20 minutes.
I got most of cone 6 glazes from Sawtooth School for the Visual Art, Winston-Salem, NC, where I am teaching an intermediate/ advance wheel-throwing class.

Silica 15.2%
Talc 13.8%
Dolomite 8.1%
EPK 4.5%
Gerstly Borate 17.9%
F-4 Feldspar 46.8%
Red Iron Oxide 12%
Bone Ash 12%
Crocus Martis 6.2%

Custer 26.6%
Strontium Carbonate 3.3%
Frit 3134 30.6%
Wollastonite 10.6%
Talc 2.3%
EPK 8.4%
Flint 18.2%
Red Iron Oxide 6%
Tin Oxide 5%
Zircopax 8%

my glaze logs recorded how I applied and fired each glaze

glazed the whole piece in Orange Street and then dipped around 1/3 of the piece in Creamy Rust 

when Creamy Rust is over Orange Street, it tend to run


  1. Thanks for sharing the recipes, love the orange street glaze. overlapping in cone 6 oxidation glazes sure can give some interesting results.

  2. Just wanted to know if this glaze recipe is food safe?

  3. i really like that orange street glaze, do you fire cone 6 oxidation? gas or electric? is it really a red, or kinda more like a cone 10 ohata?

  4. Hi Alex, it's cone 6 oxidation in electric kiln. It's close to high fire Iron Red.

  5. Could you please tell me if the Orange Street is supposed to add up to 136.5?

    1. Hi DKat, could you tell mw what 136.5 is referring to? Are you asking about a particular material?

    2. Powen, What DKat is referring to is the standard practice of listing base glaze ingredients in percentages that add up to 100%. The coloring agents and other additives such as Bentonite come after. For example, a recipe for a basic cone 6 celadon:

      Custer Feldspar...........25%
      EPK Kaolin................25%
      Red Iron Oxide 3%

      The custer feldspar, silica, whiting and EPK kaolin are the base glaze ingredients. The red iron oxide is the colorant. I hope this is helpful. (BTW, very pretty glazes.)

    3. Hi Janine, Thank you for helping me out. Now a day, not much potters understand about this. What type of work do you make?

    4. Yes, how does that work if the percentage doesn't add up to 100%?

    5. Hi, yes, base glaze should add up to 100%. This is an accurate way to DEVELOP or to CREATE a new glaze.
      But in the Orange Street case, it was modified to suit a more satisfactory result by adding flux. The addition of flux made the base glaze add up to 106.3%. Since I have no intention to adjust this glaze anymore, I just leave it that way.
      Of course, you can always divide each material by 106.3% to produce a 100% recipe. In this case, in the 100% total recipe, Silica will be 14.3%, Talc will be13%....... ect.
      I hope I explain this well................

  6. Hi DKat, Yes, please use as is. I wrote an explanation on my new post. Sorry about not following up with you early.