I have two recipes for a clear glossy glaze..one is for low fire 04 and one is for mid range 5/7. The interesting part is that they are practically identical recipes..only difference is the order of ingredients..How can this be? I have actually made these up and tested them and they do fire to the cone they are supposed to.. The low fire recipe is Gerstley Borate 55, EPK 30, Flint 15. The mid range is Gerstley Borate 55, Silica (or flint) 15, EPK 30. Can the order you put things together have that much effect? And can a glaze have such a broad firing range? I have made my own glazes for a while now but always using someone else's recipe...I don't claim to really know anything about glaze calculation, I just follow the recipe like cooking a stew. But this does mystify me...So if you glaze calculating experts out there could weigh in on this with some answers I would be most appreciative.