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Pottery/Glazing Red Clay for Raku Firing


Dear Sir Ti Phillips

Can I use my red clay fired at 960º to use Raku technique with at 1050º Glazes Celsius ?(Celsios")

The issue is that our Portugal red clay it is fired at 960º and the price of propane is to too high to work with stonewares and at high temperature glazes so  I need to find a solution to achieve the great finishes, as we find in RAKU.
Do you understand what I mean?

I know some local potters that do this but in “oxidation”. They bisquit  fire the red clay at 960 (cone 08) and do a second firing glaze at 1050 (cone 05). It works well but the result is "uniform" and I want a more artistic way... like in RAKU

I know about the "clay body" necessary for Raku but I will try with "sand" or "grog" and I will see the results. Do you think it could work?

I look forward to hearing from you soon,
Bruno Dantas

Dear Bruno,

    Thank you for your recent question. Yes, you can use the red clay for Raku. Before adding grog or sand, I would test the clay body in a Raku firing first. This will give you an idea of the stability of the clay body and if it will withstand the firing process. If the clay cracks or shatters, try adding grog or sand in the amount of 5% and test again. Keep a record of the amount of grog or sand you use so that you can repeat the process for large amounts of clay.

    You must remember that Raku is non-functional firing and can not be used for dishware because of its porous nature. Even with a glaze application, the clay body will still be porous. Furthermore, the glaze may contain ingredients that are not safe unless brought to a specific temperature. So keep this in mind when firing Raku.

    I hope this helps you. If you have further questions, please feel free to contact me at any time. I am always at your service.

Ms. Ti Phillips
Earth Stoke 'N Fire Pottery Studio and Artist Retreat


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Ti Phillips


Will answer any questions on hand building, wheel, glaze, firing. Speciality questions to include those in glaze calculation and development, firing techniques. Please do not send questions on identifying pottery. Although I would love to add this to my question topics, I have a retreat to run as well as the studio and volunteering on AllExperts, and therefore do not have the available time to research indentification and marks. Thank you for understanding.


Experience includes 30 years in pottery design and education. Have taught online and studio classes worldwide for the last 20 years. Own a pottery retreat specializing in firing techniques. Have 12 years solid experience in glaze calculation and formulation as well as problem solving in glaze chemistry. I am the first potter in the United States to have developed a complete package of pottery equipment blueprints for a studio. The blueprints include wheels, kilns, studio furniture, wedgeboards, raku kilns, slab rollers, ball mills and studio tools.

Alliance of Pottery Artists Worldwide Association

Ceramic Industry - PPP Wyndstryder Press - Pottery Journal

University of Sciences and Art's of Oklahoma, studied under Professor Jaymes Dudding.

Awards and Honors
Potter of the year with APAWA, various awards for showmanship and design.

Past/Present Clients
Available upon request.

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