ʻOku totonu ke IIC T1 ʻa e faʻahinga fakamoʻoni ʻoku fie maʻu ki he ngaahi feituʻu ʻoku fakapaaki ʻo e.
Ko ia ai, ha faʻahinga koloa IIB ʻoku ʻikai lava ke talangofua ki he ngaahi tuʻunga moʻui ko ʻeni. ʻOku to ʻa e fakafaʻahinga ʻo e kasa mixtures ʻi he ʻatakai ki IIA, IIB, mo e ngaahi faʻahinga IIC. ʻOku fakapapauʻi ʻa e fakafaʻahinga ʻe he founga Lotoloto ʻo e fakafepakiʻi ngaahi kasa. ʻOku mahulu hake ʻa e ngaahi tuʻunga moʻui IIC ʻi he ngaahi IIB, tokoniʻi ʻe he foaki ʻa e malu.