Coffee Brewing

There are several common methods for coffee brewing :

1.Vacuum Brewing

Two globes fit together. Either in one of the globes, or between the globes, is a filter to separate the grounds from the liquor. Ground coffee is placed in the upper globe, often on top of the filter, and enough water to brew the grounds is placed in the lower globe. The globes are then fitted together and the lower globe with the water is heated. The water in the lower globe begins to heat to a boil and as this causes the pressure in the lower globe to increase it forces the water up into the upper globe containing the grounds. Once all the water has made this air pressure induced and then take off the heat source. This allows the lower globe to cool down back to room temperature, decreasing the pressure in the lower globe and thus sucking the brewed coffee back down (through the filter) into the lower globe. The coffee is then poured out of the lower container and enjoyed.




http://tw.youtube.com/watch?v=az-ZTEuNe-A

2.Drip Brewing :
The easiest way to brew coffee is by using an automatic drip coffee brewer. To brew coffee in a drip brewer, place a thick paper filter in the brewing cone and thoroughly wet with water. This helps remove the paper taste from the filter. Then freshly grind the coffee using a medium grinder. As the water begins to boil, pour the coffee into the coffee filter. Now as the water pours over the coffee, shake the cone to ensure an even extraction. Brew time and temperature are taken care of automatically.





http://tw.youtube.com/watch?v=GSS2Oa2WhI8

3.coffee machine

Attention: time should be well-controlled at about 83℃, 3min.
Disadvatage: less aroma and flavor.