keridawn Posted November 9, 2022 Report Share Posted November 9, 2022 My local studio only sells cone 5 clays, and I want to fire in my home kiln to cone 6 because glaze results are usually better. I have two clays that say to never fire over cone 5 because of bloating: Speckled B-mix and B3, so I won't do those over 5...but the other clays I have don't say NOT to fire over cone 5....I have Laguna's Dover White that just says its a cone 5 clay (but doesn't say not to fire over cone 5)...so I'm wondering if it might be ok to ^6? Anyone have experience with this one? I also have Some Aardvark clays like Sedona Red & Bmix 5, that on their chart is under the cone 5/6 category, which is confusing to me because it's name has a 5 in it, does that mean I can't fire that to ^6 either? Thanks! Quote Link to comment Share on other sites More sharing options...
Kelly in AK Posted November 9, 2022 Report Share Posted November 9, 2022 I have fired Laguna B-mix 5 to a very solid cone 6 several times without problems. Quote Link to comment Share on other sites More sharing options...
Min Posted November 9, 2022 Report Share Posted November 9, 2022 I have fired Laguna Dover White to cone 6 with no problems. This was about 20 some odd years ago, don't know if it has changed since then. Fired Laguna B-Mix to cone 6 for about 15 years, no problems. Quote Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted November 10, 2022 Report Share Posted November 10, 2022 I think it’s always a good idea to verify the firing temperature and porosity of your clay body, or even make some tests intended to find the breaking limits of it. If you know exactly how far you can push your materials, it can open up some fun creative possibilities. edited to add: Sometimes there’s some flexibility in what the manufacturer suggests, sometimes not. Some things like super glassy porcelains, black clays or anything with a manganese speckle may be more susceptible to bloating or warping if they’re over fired. If your firing cycle is different than the one the supplier used to base their recos on, the final porosity may be different as well. Quote Link to comment Share on other sites More sharing options...
oldlady Posted November 10, 2022 Report Share Posted November 10, 2022 keridawn, why not contact the manufacturer by TELEPHONE not email to ask a technician your questions? the one marked 5/6 indicates you can fire successfully at either cone number. ask the professional, they have a stake in keeping your business and will help you. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.