I just unloaded the first firing using the Envirovent that I installed on my Skutt 1027. The cones were much more even, slightly hotter at the TC, but much improved over the cones with out the vent. Problem is, I used the cone fire mode for 04 slow fire, that is supposed to compensate for irregularities and the Skutt tec said it would be more dependable that the Ramp mode I had written for my firings. Kiln ran 12.30 hrs, 4 hours less that the program I usually run, and went to 1945.with no hold. My Ramp firings are to 1920 with an hour hld. When I unloaded this AM, none of the 04 cones are bent at all, the 05 are only slightly bent. BUT the firing is more even with the vent. GRRRR. what went wrong? I can't call Skutt until noon my time Monday AM. hoped to be running a glaze fire on this work before then.
Can I refire the bisque without risking the work? Do I need to refire it? I'm used to 04 bisque work and this isn't even 06 from the looks of the 05 cones.