P72 Semi matt cobalt green with yellow crystals

glaze P72
This glaze use to be very safe. It is a green semi matt glaze with more or less bright yellow crystals. 1270oC with one hour at top temperature. Not too thick.
   
nepheline syenite 66,05
zinc oxide 4,82
dolomite 4,51
whiting 4,82
ball clay 4,51
quarts 6,91
rutile 8,41
copper oxide 0,30
cobalt oxide 2,00
red ferric oxide 0,60