D.E.Bishop wrote:
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I do have a serious question, however, who determined that 190 degrees is the perfect temperature for brewing coffee and what objective testing methodology was used?
Actually the temperature depends on the type of coffe, type of brewing, and how you like your coffee. If you're doing espresso then you'll want a higher temperature: closer to 210 degrees. Also French Press coffee will need to have boiling water, 212 degrees, to properly get the most from your French Press. It needs to be hotter because it cools down pretty quickly.
Mostly 190-200 degrees has been arrived at by trial and error. It's what tends to get the most flavor out of the beans without cause excess acidity.