What Is Freeze-Dried Coffee?

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Freeze-dried coffee, also known as instant coffee, is dehydrated coffee that is made from coffee liquor (coffee that already has been brewed). To be used, freeze-dried coffee is placed in hot water and rehydrated.

Freeze dried coffee is a high quality crystallized form of instant coffee which is created, as the name suggests, through cold processing.

Common to both spray dried and agglomerated, there are three main manufacturing stages: extraction, concentration and drying. To extract, fresh roast and ground coffee is put into a series of percolation columns, typically 5-10, in which hot water and pressure are applied to the grounds to yield an extract with approximately 20% soluble coffee solids, and the balance water. Concentration of the coffee extract can be done in various ways.

 Manufacture
•The method of manufacture for freeze-dried coffee is relatively simple. Coffee grounds are brewed as normal in large commercial vats. The resulting coffee liquor is then placed through evaporators so that it becomes highly concentrated. It is then foamed and frozen. The concentrated coffee then is ground into particles, and the crystals of ice within the particles are removed through the process of sublimation.
 Advantages
•There are several advantages of freeze-dried coffee when compared to regular brewed coffee. Freeze-dried coffee is extremely portable. It comes in large containers but also individual packets that can be transported in pockets, purses, or lunch containers. Also, freeze-dried coffee does not require any equipment such as a coffee maker. All that is needed is a cup and hot water. Freeze-dried coffee is ready faster than brewed coffee. It is ready as soon as the crystals of coffee dissolve in the water. It is hard to get the strength of the coffee incorrect, since coffee drinkers can simply add more crystals or add water until they reach the strength they like.
 Types
•As with regular brewed coffee, there are many types of freeze-dried coffee available. Coffee drinkers can choose from caffeinated and decaffeinated versions, and there are many different flavors based on the coffee grounds that are used to make the freeze dried coffee. These flavors can be tweaked based on how many crystals are put into a cup, and coffee drinkers can find the brand that suits them best.
 History
•Freeze-dried coffee has a history that spans more than a century. It was invented in 1901 by Satori Kato, a Japanese scientist. Later, George C.L. Washington first marketed the product around 1910.The first pump driven espresso machine was produced in 1960 by the Faema company.
 

Common to both spray dried and agglomerated, there are three main manufacturing stages: extraction, concentration and drying. To extract, fresh roast and ground coffee is put into a series of percolation columns, typically 5-10, in which hot water and pressure are applied to the grounds to yield an extract with approximately 20% soluble coffee solids, and the balance water. Concentration of the coffee extract can be done in various ways.

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