I have been trying to formulate some of my own glazes with free materials. Thus far I have made a glaze consisting of subsoil from around my house and ashes 50/50 by weight. This glaze was fired to cone 10 bending to about 2 o'clock in my wood kiln. It came out all rough and scabby. I was wondering if I should try adding a flux or more glass former? or maybe something else entirely.
I have another glaze made from the wet saw tailings at my local stone counter top installer this was mixed with ash and a binder clay 40/40/20 and has a similar problem.
thanks for the advice.