Almost the final operation before directly preparing the coffee is grinding coffee beans, which also affects the quality of brewed coffee. Improper grinding of coffee beans can ruin coffee even from elite varieties.
Grinding coffee beans, types of grinding, the ratio between the time during which coffee is brewed, and the degree of grinding of its beans, the storage time of ground coffee.
There are standardized requirements for grinding coffee. In accordance with these requirements, the following types of grinding are distinguished:
Very fine grinding of coffee beans, like powder, when particles of up to 0.15 mm are obtained.
The average grinding of coffee beans – particles up to 0.3 mm.
Coarse grinding of coffee beans when particles are up to 0.6 mm.
Very large (coarse) grinding of coffee beans when particles are up to 0.8 mm.
In reality, grinding produces a mixture of particles of various sizes. The choice of a specific type of grinding depends, firstly, on what method of making coffee you prefer and the type of coffee machine you use.
more complete extraction of flavoring, aromatic and tonic substances is provided.
Storage time for roasted coffee beans and ground coffee.
Roasted coffee beans are a very delicate product and should not be stored for long periods. Ground coffee does not tolerate storage even more. For roasted coffee, storage periods are calculated in days, and for ground coffee – literally for hours, so grinding coffee is best just before you brew it. Following this rule, you cannot store coffee for future use..
Despite all the technical tricks (hermetically sealed cans, where the air is replaced with an inert gas, vacuum packing, etc.), which help to extend the shelf life, the aroma of coffee gradually disappears, not only as a result of the volatilization of the coffee ingredients, but also because of them in contact with air and moisture is oxidized.
This is especially true for ground coffee, from which aromatic substances “disappear” quite quickly. Its quality begins to deteriorate not by the day, but by the hour. The storage limit of such coffee does not exceed 10 days. Coffee made after this shelf life leaves much to be desired..
Vacuumed coffee bags are stored for several months, but as soon as the bag is opened, it must be consumed within 8-10 days. In the future, but not for long, this period can be extended if the coffee is stored in the refrigerator in a sealed glass container, where moisture and odors cannot penetrate.
Based on Coffee, 333 recipes.