Recently I did a cone 03 glaze fire (fast firing) for earthenware pieces and during the firing at 1833 degrees F, the kiln received an error code for e-1. The firing was intended to reach 1987F but was not able to reach this temp due to the error. The effects were pinholing and glaze which had not matured, due to being underfired. I would like to re fire these pieces again, but am uncertain as to what temp will help the glaze mature. Earthenware, I was told by my instructor will crack if put through a second firing at the same temp (cone 03). Does anyone have an idea as to what temp will be appropriate for a re-glaze fire? I will not be using the same kiln (an automatic) and instead will be using a manual.
Side note: the kiln was put through a test firing after the e-1 incident and seems to be working just fine..but since it has already received the code once and caused problems, I would prefer to use another kiln for the re fire of my glazed earthenware pieces.