It’s Cone Art 2327D Round GX. I have done three Cone 04 bisque slow and one Cone 6 glaze slow and one Cone 6 medium and each firing when longer than the book indicated.
Hi, I have a new Cone Art Kiln with a Bartlett programmer. I have fired 5 times and each firing has been at least two hours longer than the program indicates. My test cones are perfect so I am wondering what affects the kiln firing times.