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Pottery/Firing Multiple Cones Together

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Question
I fire my greenware to bisque at cone 05.  The glazes I have vary in cones from 04, 05, and 6.  My question is, can I glaze fire them together?  If so, what cone should I use?

Answer
Dear Debbie,

    Thank you for your recent question. Unfortunately, you can not fire the cones you have listed together. Firing cone 04 and cone 05 to cone 6 will melt cone 04 and cone 05 completely off the ware. They would melt all over your kiln. If you were to fire cone 6 to cone 04 or 05, it would be under fired and look like chalk as well as not fuse with the clay body properly.

    My suggestion to you is to create enough ware in each cone to fire a full load of each. In the future, I suggest that you determine which glaze cone range that you would like to work with and purchase glazes in that cone only. This will allow you to make ware that is of a particular cone and suitable for the projects you intend on making. If you are working with non-functional ware, then cone 04 and 05 are perfect for this type of pottery. Functional ware can be made with any of the cones you have listed, so long as the glaze is food safe.

    Something to keep in mind is the higher the cone, the more mottled the glaze will become. So if you like working with true colors, then I suggest you work with the lower cones. However, if you like colors that are multiple, like crystals or special designs like oil spot, then you should work with glazes in the cone 6 and above range.

    I hope this helps you. If you have further questions, please fell free to contact me at any time. Much luck to you.

Sincerely,
Ms. Ti Phillips
Earth Stoke 'N Fire Pottery Studio and Artist Retreat
www.earthstokenfire.com

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Ti Phillips

Expertise

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

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.

Organizations
Alliance of Pottery Artists Worldwide Association

Publications
Ceramic Industry - PPP Wyndstryder Press - Pottery Journal

Education/Credentials
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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