Therefore, a ristretto is not simply twice as "strong" as a regular shot, nor is a lungo simply half the strength.
An espresso will have about 25 ml (approx 1 oz) of water in it; a Caffè Lungo will have about 50 ml (approx 2 oz).
2 Nevertheless, a rough guide is a brewing ratio of 1:1 for ristretto, 1:2 for normale, and 1:31:4 for lungo 3 a ristretto is thus 30 ml/1 oz (the foamy crema slightly increases this volume normale is 60 ml/2 oz, and lungo is 90120 ml/34.
To change this into a Caffè Lungo, you will hold down the handle for up to 60 seconds.
As the amount of water is increased or decreased relative to a normal shot, the composition of the shot changes due to the fact that the flavour components of coffee dissolve at varying rates.It is essentially an espresso with about double the amount of usual water.English-speaking world ) Like the lungo, it is all brewed water, but is about twice as long as a lungo.An even longer form of Caffè Lungo is, caffè Crema.So, the second explanation given in the book is the standard way.The optimum is obtained with 9ion needed, in French it is called café allongé.Brewing edit Ristretto, normale, and lungo are relative terms without exact measurements.
People who are into coffee mostly prefer pure coffee.
The coffee will have a layer of crèma on top.
Flavour edit, a lungo is less strong, but more bitter, than an espresso, because the additional hot water passing through the ground coffee extracts components that would normally remain undissolved.
This achieves approximately the same ratio of oils to water as the dilution method, but also releases a different mix of flavours due to the longer extraction.