For manufacturing condensed milk, raw milk is clarified and standardized, and heated to 85 - 90 °C for a few seconds. This heating eradicates some microorganisms, reduces fat separation, and inhibits oxidation. Then water is evaporated from the milk and sugar is added to it, which extends the life of this dairy sweetener. The sucrose in the sugar increases the liquid's osmotic pressure and prevents microorganism growth. Finally, the sweetened evaporated milk is cooled and lactose crystallization is induced.