Many foods that are made to last for a considerable amount of time or food that needs a certain consistency, like coffee, need to go through an evaporation step during processing. It is also used as a drying process and can be applied in this way to laboratories where preservation of long-term activity or stabilization is needed (for enzymes for example). Evaporation is also used in order to recover expensive solvents such as hexane which would otherwise be wasted. Another example of evaporation is in the recovery of sodium hydroxide in kraft pulping. Different products manufactured through the application of evaporators in the food industry include: - milk products : skim milk, condensed milk, cream, buttermilk, mixed milk products, sweet whey, sour whey, whey permeate, whey proteins, lactose solutions - high-protein juices : soya whey, yeast extract, fodder yeast - fruit juices : oranges & other citrus juices, apple juice, mixed juices, tropical fruit juices, coconut milk - extracts : milk and bone extracts, coffee and tea extract, meat extract, malt extract