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Is It Better to Sieve Out Particles Smaller Than 400μm?

Is It Better to Sieve Out Particles Smaller Than 400μm?

Or is it better just to leave them in, when brewing filter coffee? Back in 2012, our very own Matt Perger won the World Brewers Cup, using a 250μm sieve to remove fines. This created a more even extraction, which allowed him to extract higher without getting dry and...
Espresso With Aeropress Filter Papers

Espresso With Aeropress Filter Papers

Above and below the coffee bed This week, Scott Rao made espresso with filter papers above and below the coffee bed yielding over 25%. What’s he playing at? If you follow Scott Rao’s series of daily coffee tips on Instagram, you’ll have seen one recent post...
What Difference Will It Make to an Espresso

What Difference Will It Make to an Espresso

If I raise the temperature of my machine by one degree? Decades of trial and error have shown that most people prefer espresso extracted between 85-95°C (A Illy and R Viana, 1995). For lighter roasted, special coffee, the range typically used is rather narrower...
Celebrity Deathmatch: Forchheimer vs Darcy

Celebrity Deathmatch: Forchheimer vs Darcy

A science professor told BH that with espresso, “in technical terms you have Forchheimer flows instead of good old Darcy flows”. What’s that? Keen readers of this series will remember Darcy’s Law from our discussion of bed depth in espresso. Darcy’s Law is an equation...

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