Un retour-de-la serviette de calcul serait d'estimer la proportion de vieux café de café frais à environ 1200:1, soit environ 0,5 gouttes par once. oui @OmarMiranda Pourquoi? Toutes les références à une copie de sauvegarde? Ewwwww! Thermos de café... ^_^ Je ne comprends pas le vote serré. La question ne mentionne pas une marque, mais c'est sur une fonctionnalité qui n'existe pas. Je ne sais pas la réponse, mais je suppose qu'il a à faire avec l'existence d'2 systèmes de chauffage. Un pour le brûleur et l'un pour chauffer l'eau avant de les distribuer sur le terrain. @JoshuaAslanSmith - C'est certainement le cas que nous ne pouvons pas, avec autorité, de répondre à la question, mais il est encore raisonnable de se poser la question. (Bien que je vais modifier le titre.) Les réponses devraient lien vers des sources. Je ne peux pas modifier le titre. Suppose que je n'ai pas assez de réputation. Il devrait être changé pour quelque chose comme: Combien de caféine par jour est considéré comme dangereux? Je vote pour le garder ouvert, mais pour modifier le titre et certains aspects du corps de la poste.

Bien que je n'aime citer Wikipédia comme ma référence principale, il n'est dans ce cas avoir une assez bonne vue d'ensemble de termes liés à l'extraction du café, re-voici un résumé:

Extraction:
Le montant de la masse initiale des motifs qui se retrouve dans le café infusé. Bien que cela dépend de la méthode de préparation ("méthode d'extraction", par exemple, goutte à goutte, de moka, de l'espresso, le froid, infusion, ...), il est recommandé d'extraction montant est d'environ 20% (c'est à dire, environ 20% de la masse de fèves/motifs finit dans le café).

Moins de ~15%-18% extraction est considéré comme "sous-extrait" et peut être sure. Qui est, en vertu de l'extraction n'est pas juste une question d'inefficacité: le résultat peut être aigre et asymétrique en raison du fait que les acides aminés sont extraites rapidement. D'autre part, plus de ~22%à 25% de l'extraction est considéré comme "plus-extrait" et peut être amer, parce que les substances amères sont extraits plus tard dans le processus de brassage.

Ces chiffres ont été générés par des groupes à haute consonance des noms comme la Specialty Coffee Association of America, l' Infusion du Café de l'Institut, et de l' Espresso italien de l'Institut National. Aussi connu comme "solubles de rendement." Voir aussi cet article sur l'extraction de l'espresso.

Force:
La concentration de l'extraction des composés dans l'eau. En gros, combien de tasses de café est dans l'eau par unité de volume ou de masse).

Comme indiqué dans la question, il y a aussi familier ou vernaculaire usages de ces termes (par exemple, de "force" que par rapport saveur; "extraction" que le processus de brassage, etc.) mais le ci-dessus semblent être acceptés tangible de la définition des termes.

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