Maxxxx

Do you mean C05?    C5 would be nearly impossible to do a proper glazing on the pot.  

Hi Denise.  You know I've been making for almost 20 years but always in someone else's studio like Craft alliance or Kruegers in St. Louis or the night school  studio and I've never actually fired a kiln or known or asked what the firing temp is.  At Krueger studio our work always went on shelves marked 5/6.  In craft alliance I never knew and the small art studio where I currently volunteer someone else sets the kilns.  It's not that I'm lazy, but I fell in love with making, never had a kiln, and forgot about the other end of the business. I need to pay attention to low and high fire methods and now that I've said all this,  what is the difference between .05 and 5 .

Hi Maxxxx,

The difference between cone 05 and cone 5 is approx 280 F.  Cone 05 is approx 1888F and cone 5 is approx 2167 (depends on the rate the kiln is fired at towards the end of the firing). Cone 05 will leave the midrange bisque wares porous enough to accept the glaze, at cone 5 a midfire clay will be mature or close to it and won't be porous enough to accept the glaze easily.