Robusta Coffees for Home Roast Espresso Blends (#)
„Robusta accounts for 25% of the coffee production. There is a LOT of very low grade Robusta out there, used to pump up caffeine content and as a cheap filler in institutional coffee. We offer some high grade robusta but I must confess this to you: I have difficulty telling the difference between 12% of a haigh quality Java or PNG washed robusta in an espressp blend, and a more expensive name-brand Indian one. I just think you reach a quality threshold and anything above it is "good enough".“
http://www.sweetmarias.com/coffee.robusta.html - Cached
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„Fine Arabica coffees contain one half of the caffeine found naturally in the cheaper Robusta beans that are used in supermarket coffees. (Using Robustas in espresso blends is another controversy that tweaks the regulars around the newsgroups.) The results of chemical analysis performed by Lauk's Testing Labs in Seattle were recently posted at the LucidCafe Web site by David Schomer. Check out these numbers: Espresso Ristretto (18.5 grams of finely ground coffee, 1 3/4 fluid ozs) 230 milligrams of caffeine. Paper Filtered, Cone drip brewed coffee (18.5 grams of Arabica coffee, about 16 fluid ozs) 340 milligrams of caffeine Those are interesting numbers but I don't know anyone who makes a 16 oz pot using only 18.5 grams of ground coffee.“
http://gawlowski.com/matt/html/ espresso_faq.html
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„Fine coffees at any degree of roast contain roughly the same amount of caffeine (about 100 mg per cup). A single shot of espresso, while it may taste "stronger,"contains less caffeine than a regular cup of coffee (only about 70 mg.) because it is made with less ground coffee.“
http://www.peets.com/.../ coffee_faqs.asp?sid=d29320c4c6e79499ae6ec3359aa2a837
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Espresso! My Espresso! An Ongoing Internet Novel - CHAPTER
„ I explained to her what I had brought, "...and I home roast and blend my own coffee..." and it's not at all bitter, and it's low in caffeine, and all the satisfaction of a Spring shower, and the rest of the commercial.“
http://home.surewest.net/frcn/coffee/ coffee46.html
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International Coffee Organization
„Robusta coffees have about twice as much caffeine as arabicas. A 'cup' is usually understood to contain 150 ml (5 oz in the United States) but an espresso may be as small as 40 ml.“
http://www.ico.org/acoff/caffeine.htm
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„illy uses only the finest Arabica beans available, and Arabica coffee is naturally lower in caffeine than the cheaper and lower quality Robusta variety. An average 1 oz. illy espresso will contain approximately 60 milligrams of caffeine.“
http://www.illyusa.com/faqs/coffee.htm
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Archived in Coffee Caffeine, Caffeine Coffee