The plastic, spun-curd buffalo milk cheese Mozzarella, originated from southern Italy. Pasteurized milk is curdled at 90 degrees F and the curd is cut. Extra time in the vat is allowed so that the curd can sink to the bottom and so that the lactic acids can soften the curd to make it easier to knead. The curd is treated with extremely hot water (200 degrees F) and is kneaded into a shiny lump. Bits of the mass are taken off cooled salted and are soon ready to be marketed.