92167 Middle red with darker spots

glaze 92167, vase
It can be a very pleasant semi glossy red glaze with strikingly darker spots. But not always! 1260oC with half an hour of oxidation at top temperature. Not too thick or it will be a dull redbrown.
potash feldspar NR 35,40
petalite 5,20
quartz (flint) 26,40
china clay 1,70
borax frit MOK-G3 17,10
whiting 13,10
tin oxide 1,10
copper carbonate 0,53