Businesses involved in the manufacture of dairy products process milk and other dairy ingredients into foods and drinks for sale to retailers, caterers and other manufacturers. Their products may include drinking milk, cream, butter, yoghurt, fromage frais, cheese, milk powders and dairy-based desserts. Some manufacturers specialise in a particular product, while others make a range of goods from milk sourced from farms or supplied by other processors. Production typically involves receiving and testing milk, then treating it through processes such as pasteurisation, separation, fermentation, churning, pressing or drying. Manufacturers may also blend ingredients, mature cheese, package finished products and store them under controlled conditions. Product development, quality testing, hygiene controls and labelling are part of the work, with processes designed to maintain food safety and meet the requirements for different products, including chilled and longer-life goods.