Coffee. The famous caffe espresso. A kick of caffeine in a small hot cup.
The espresso coffee ? An Italian classic. Pure caffeine pumped
straight into the system in a couple of steaming hot sips.
It gets you rolling right away. One of the first Espresso machines was manufactured by Achille Gaggia in 1946. It used a hand powered piston.
On machines of this type,steam pressure in the boiler forces the water into a cylinder, then it is pressurized further by a spring-powered
piston to about 8 to 9 bar (120 to 135 PSI), or 8 to 9 times the pressure that had been developed by the steam machines.
The spring that powers the piston is compressed by a lever forced down by the barista (Italian for barkeep)the person making the coffee.
As with the older generation machines,the new ones with these lever groups are designed to cool the water from boiler to brewing temperature.
Finally, if it's done just right, the added brewing pressure creates a nice layer of foam over the coffee called crema.
Dai Prendiamo un caffe'. (Come on, lets have an espresso)