The separative-phase fancy glazes were produced with the addition of 25 wt% iron ore residue as the ceramic colorant
instead of metallic oxides and pigments. The optimal firing temperature ranged from 1190C to 1250 C were selected
through analyzing the relationship between the firing temperature and quality of glaze surface appearance. According to the XRD and SEM results, with increasing the firing temperature, the content of whitlockite decreased, which weakened the coloring of Fe2O3 and formed glaze patterns. While the size of patterns gradually increased at 1160–1220 C. Additionally, when the whitlockite melted entirely, the content of Fe2O3 in the crystals decreased so that patterns appeared on the glaze surface.