How-to.... The Process
The process is;
- first heat up the unit for at least five minutes, including allowing hot water to flow through the brewing head for 10 seconds or so;
- fill the coffee filter in the group handle (7 grams of fine ground coffee per 180 ml cup), compress the grounds in the group handle using the tamp,
- insert the group handle, tightening fully, and then
- switch on the pump.
Water at a preset temperature of about 92 degrees C will flow through the coffee under pressure and the coffee liquor will stream out of the spout. The coffee liquor should run dark at first then as a fine froth known as crema which will cover the surface of the coffee. Ideally the crema will have creamy orange colour. This should take about 20 - 25 seconds - any longer and that bitter taste will be evident in the coffee.
You will see that there is no reference to recirculating percolators above. This is a deliberate omission. You will recall the comments about the effect of boiling water on coffee. The recirculating percolator process recycles boiling water through the ground coffee for as long as it is allowed to boil thereby extracting the bitter unpleasant taste from the ground coffee. It is possible to make a reasonable cup with a percolator but you will need to stand by the stove and remove the pot from the heat as soon as the coffee is sufficiently infused and without it recycling too many times.