What are the methods of coffee extraction? How to extract good coffee? What is gold cup extraction?

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What are the methods of coffee extraction? How to make good coffee? What is Gold Cup Extract?

Speaking of "brewing" coffee, there are many kinds of coffee making equipment on the market, and the methods are different. But if the principle of coffee extraction is concerned, it is actually the same.

Core process of extraction principle:

Grind coffee beans to increase the surface area of coffee in contact with water;

2 coffee powder fully soaked in aqueous solution, coffee essence hydrophilic dissolution;

3 Separate coffee solution and coffee grounds.

All modern coffee extraction is the two core processes of soaking and filtration, which belong to the physical category, and there is basically no chemical change in the process. Coffee powder thickness, soaking time, separation and filtration methods and so on, creating a wealth of coffee brewing equipment and techniques. Although the core process of coffee extraction is the same, modern coffee extraction methods can be simply divided into two types, depending on the pressure used to extract coffee and the significant difference in extraction time:

1: Italian espresso

It is extracted at 9 atmospheres, 88°C-95°C water temperature, 22s-27s to 30 ml of espresso coffee; this is significantly different from other coffee extraction methods, unnatural conditions can be achieved, reflecting the intervention of technology. Espresso can generally be produced by Italian semi-automatic coffee machines and fully automatic coffee machines. A good cup of Espresso requires higher requirements for coffee machines and bean grinders in terms of price and quality.

2: Steep Extraction

It is a relatively traditional natural and simple coffee extraction method; the extraction temperature is close to 85-92, and the filtration pressure is about 1 atmosphere. It can be broken down into:

Filter press:

Use artificial pressure to filter coffee, including French press pot (French press coffee cup), Philharmonic pressure AeroPress;

Siphon:

Use the pressure difference caused by water steam cooling to filter coffee, including siphon coffee pot Syphon, Belgian coffee pot;

Drip filtration:

Natural gravity drip coffee, including American electric drip coffee pot, Vietnamese drip coffee pot, Swiss gold kf-300 drip coffee pot, hand brewing follicle assembly, ice drip coffee pot, etc.;