Kuppersbusch USA EKV 6600.0 manual Keeping coffee hot, Where can I get the freshest coffee?

7.1.6Keeping coffee hot

Coffee should not be kept hot on the hotplate of coffee machines or on a warmer. The reason: the heat will cause the coffee to re-draw. This means that water will evaporate, resulting in the evaporation of the fine coffee aroma. Coffee will not only lose its flavour; it will also taste bitter very quickly.

7.1.7Where can I get the freshest coffee?

Coffee bought at the small roasteries found in almost any larger town is freshest. These roasteries generally sell high-quality beans which are roasted gently for a long time.

7.1.8What is the difference between coffee and espresso?

Espresso and coffee are made from the same bean but the roasting times are different. Espresso is roasted for longer than coffee. The result: espresso is tastier and has a stronger coffee flavour with a lower acid content. Classic espresso generally comprises a mixture of Arabica and Robusta beans.

However, what distinguishes espresso and coffee most is the way they are made. Espresso is not made in filter paper; it is made in a metal sieve. Within 10 to 12 seconds for automatic coffee machines and within 25 to 35 seconds for espresso machines used on a cooker hotplate, water heated up to 95°C is forced through this sieve. This means that the espresso powder only makes brief contact with the hot water. All of the flavouring but only a little caffeine and few bitter substances are dissolved in the powder. This is why an espresso, which is considered to be a black, particularly strong beverage, only has half as much caffeine as a cup of coffee.

Training manual	Section 7 – Page 9
Coffee machines