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Bean Denseness - Affect Pour Over Bloom?
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sgnoobie
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Joined: 21 Jun 2011
Posts: 60
Location: San Francisco Bay Area
Expertise: I live coffee

Grinder: HMMS
Drip: v60 02
Roaster: Blue Bottle, Ritual,...
Posted Thu Mar 14, 2013, 9:57am
Subject: Bean Denseness - Affect Pour Over Bloom?
 

To the experts out there - I came across a couple of threads with people mentioning they receive little to no bloom with certain types of beans. I've been experimenting with several different roasters (Whole Foods Allegro, Philz Coffee, Blue Bottle, Sightglass, and Ritual) and noticed that different roasters/beans will have different weights/denseness that affects bloom.

Who here owns a Hario Slim Mill? Just as an example, Whole Foods/Sbux and Philz have pretty darn oily beans that fill up the top container of the Hario Slim (~25grams weight) and grinds up to the "2 Cup" measuring mark. Pretty much standard right? I'll get a pretty good bloom going on with these.

However, when I grab some freshly roasted (2-3 days max) Blue Bottle or Ritual Beans that have pretty much no bean oil, it'll take about 30+ grams weight to grind up to the same 2 cup measuring mark. If I use the standard recommended weight of 25grams, I'll get to maybe a little less than 1.5 cups mark. Also, man do the dry beans take much more effort to grind! I'll get very little bloom (it'll gas/bubble out quite a bit though), and I assume it's because the beans are heavier.

What's the technical rationale for this? If there is one? haha
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