25 Jun '12, 11am

@otherblackstuff how's sieving going? :-) been looking into strainers, but mps-50 is discontinued :-( other options?

I am concerned my response to this might be a little long winded as there are a few things in the above that I want to discuss further. I was with you all the way up until: The problem though, is the Gold Cup extraction percentages presume a relatively uniform grind, the kind you might get from industrial roller grinders, and to a lesser extent some commercial / bag grinders. The gold cup standard has come from decades of coffee brewing, during which time I’d argue that burr design has probably changed quite a lot, as well as what we know about coffee. Interestingly this doesn’t seem to have impacted upon the ideal of 18-22% even extraction. Fines have a higher surface area, gram for gram, and therefore extract faster. With no fines you’d have to work harder to extract a fuller percentage of the coffee, obviously with too many fines then you’d likely get an overextraction,...

Full article: http://theotherblackstuff.ie/placesandfaces/gold-cup-pyri...

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