Manual Gastroback 42619 - Design Espresso Advanced Barista (page 99 of 148) (English, German)

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meters can be influenced during preparation and extraction: the grind size, dosage

and tamping pressure as well as the extraction volume. Attempt to get the perfect

balance of sweetness, acidity, and bitterness.

Adapt the factors of your extracting method in small steps one by one to achieve the

taste you prefer. For your assistance, the pressure gauge of the appliance gives a

clue for finding the optimum settings and procedures. As a starting point, you should

use the defaults of the appliance. For your first steps, the double-wall filter baskets

make it easier to find the optimum combination of factors.

Selection and Storage of Coffee Beans

• It is best to grind coffee beans directly before the extraction. Aroma and taste

will fade quickly, when storing coffee powder for more than a week. Buy coffee

beans in small batches to reduce the storage time.

• Use the integrated grinder of the machine for grinding and measuring up the

dosage just before starting an extraction.

• Store coffee beans or coffee powder on a cool, dark place in a dry, air-tight

container. Using a vacuum sealer from Gastroback, you can vacuum seal your

coffee beans or powder in appropriate portions to preserve aroma and taste.

THE GRIND

• The grind size will influence the rate at which the water flows through the coffee

powder in the filter basket and, therefore, the taste of the espresso. The grind

size should be fine but not too fine. If the grind is too fine (looks like powder and

feels like flour when rubbed between fingers), the water will not flow through the

coffee powder even when under pressure. The resulting espresso will be dark

in colour and bitter in flavour. If the grind is too coarse, the water will flow too

quickly. The result will be lacking in colour and flavour (see also: ‘The Optimum

Extraction’).

• When purchasing already ground coffee, ensure that the coffee is suited for

espresso machines, as indicated on the packet.

• For adapting the grind size to your favourite taste, begin with a medium grind

size in a range, suited for espresso machines. This corresponds to the grind size

setting 3 (default value of the machine) for the grinder of the machine. Change

the settings in small steps to reach the desired optimum. It is normal that a few

attempts are needed for finding the correct grind size.

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Gastroback 42619 - Design Espresso Advanced Barista Manual

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