The original question was for a cone 6 celedon in Oxidation. I think most of us are aware that the original Chinese celedon is fired in reduction in wood kilns. Here are 2 examples of a celedon fired to ^10 reduction (Right) and a faux Oxidation celedon fired at ^6.(Left)
BTW the one on the right used burnt umber as the colorant.
Thank you for the formulas Marcia. I know of HS teacher that is looking for a celedon. I will send these to her. Your posts are always interesting and informative.