i.Our house celadon on the old 4·3·2·1 base: forty feldspar, thirty silica, twenty whiting, ten china clay. One per cent iron turns jade green only in a reducing kiln.
ii.It goes in grey and comes out green. Fired in oxidation the same bucket gives a pale straw yellow.
iii.Silica to alumina near 10 : 1, the bottom edge of the gloss band. That is why it crazes into a fine crackle.
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