Macchinetta del caffè (literally "small coffee machine" in Italian language)
Bialetti is the world's largest manufacturer of domestic coffee makers.
In 1933, Bialetti produced the first Moka Express Stove-top Espresso Maker - a simple yet delicious way to make coffee. Now it is estimated that somewhere in the region of 120 million cups of coffee are made every day using this design of coffee maker.
How to make the perfect espresso.
Fill the boiler (marked A in the diagram) with water almost up to the safety release valve and insert the funnel-shaped metal filter (B). Add finely-ground coffee to the filter as shown below. Tightly screw the upper part (C, which has a second metal filter at the bottom) onto the base. Place the pot on a suitable heat source, bring the water to its boiling point, and thereby create steam in the boiler.
A gasket ensures a tightly closed unit and allows for pressure to safely build up in the lower section, where a safety valve provides a necessary release in case this pressure should get too high (with clean filters, that should not happen). For best results, fill up the entire filter with coffee and place over medium to medium-high heat.
The steam eventually reaches a high enough pressure to gradually force the surrounding boiling water up the funnel through the coffee powder and into the upper chamber (C), where the coffee is collected. When the lower chamber is almost empty, steam bubbles mix with the upstreaming water, producing a characteristic gurgling noise.
As with percolators, the pot should not be left on the stove so long that the coffee boils. Ideally, with a little practice, it should be removed from the heat before it actually starts gurgling - usually, when only about half of the top chamber has been filled.
The bottom chamber (A) contains water. When heated, steam pressure pushes the water through a basket containing ground coffee (B) into the collecting chamber (C).
Your Bialetti coffee maker begins to work when heat is applied to the base causing heat to build up in the lower chamber. (Many believe that the water begins to rise only when the water reaches boiling point however this is not the case). It actually works by heating the air causing it to expand and force the water through the funnel and into the upper chamber. This begins to occur at a temperature of 500C and will end at a temperature of 900C. The end result is a perfect coffee at 700C which, depending on the heat source, will be brewed in approximately 5 – 10 minutes.
Bialetti are able to achieve this temperature by creating the ideal pressure and temperature in the lower chamber. Many imitation units are unable to achieve this ideal temperature and therefore burn the coffee before reaching the upper chamber. The end result is a burnt and bitter coffee.
Bialetti uses food grade certified Aluminium which many competitor products around the world simply don’t have.
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