Frasca Wood Ash Glaze, Cone 6, oxidation or reduction

Frasca Wood Ash Glaze Cone 6, oxidation or reduction
Glaze Material
Whiting 11.36%
Wood Ash (unwashed) 54.56%
Potash Feldspar 11.36%
Ball Clay 11.36%
Silica (Flint) 11.36%
Total: 100.00%
For green, add:
Copper Carbonate 4%
For blue, add:
Cobalt Carbonate 2%

This recipe is included in
Top Ten Cone 6 Glaze Recipes: Recipe Cards for Our Favorite Mid-Range Pottery Glazes, which is free to Ceramic Arts Daily subscribers.

  • Greg S.

    Use wood ash from your fireplace or a friend’s or from a wood fired pizza kitchen. I gather the wood ash from the campfire we make at our annual wood firing and have enough ash for many glazes throughout the year.

  • Wood Ash. Where can you buy it? Can you get some from your fireplace? What is the best source for wood ash?

  • Rebecca L.

    I’m not worried about lead, I’m worried about leaching of other materials. Especially the colorants. I did a “lemon test” and it passed. I was wondering if anyone had done other food safety tests?

  • Diana S.

    yes, it’s safe, Rebecca, there is no lead in wood ash (natural or synthetic) and also no barium.

  • Rebecca L.

    Is this glaze food safe?

  • Paul C.

    Robert Tichane’s book, Ash Glazes gives a substitute for wood ash.

  • Lucinda B.

    this genius just doesn’t have access to wood ash, not really wanting the whole ash glaze thing/effect but matt black surface required. Found an example that looks nice but it requires WOOD ASH of which I have none! So I was wondering if there was anything to try instead? Or failing this if anyone has a reliable matt black recipe that fires to cones 6 ish??? would be really really grateful! xxx

  • Did someone not take their happy pill today? Stephen Hill has done pretty well for himself and he has several “fake ash” high fire glazes in his arsenal of beautiful glazes. So I guess you could say He is a genuous who would dare to ask such a rediculous question.

  • Melinda C.

    I”m sorry, but what genius would ask if you can give a substitute for wood ash, when it is a
    WOOD ASH GLAZE….sorry, but that is just too much…..

  • Janice W.

    Tina, i am definately no glaze expert, but i was wondering the same thing. I am guessing that we could use the base then add various oxides to obtain differant colours. for example… add some iron oxide 3 to 5% to get brown. I am going to experiment with the above. Perhaps you can do the same.

  • Tina H.

    I’m looking for a brownish cone 6 woodash glaze similar to Stephen Hills. If I delete the colorants will I get this?

  • Tina H.

    I’m wondering the same thing Sherry. Does anyone have an answer?

  • Sherry D.

    Is there a suitable substitute for Wood Ash?
    There’s a glaze recipe for synthetic wood ash(from book, “Oriental Glazes” by Michael Bailey – can this be used?

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