As a newcomer to firing my own work can anyone explain cone tempretures? I have an electric kiln with a digital temperature control so i don't use cones. So much advice refers to firing to cone 06 or 04... I've tried researching this but can't find a definitive answer. If kilns have advanced to accurate digital control why do i need cones and why can't firing advice refer to given tempretures? Any advice will be greatly received.