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Category Archives: Coffee Varietals

The Effects of Varieties, Origin and Processing

In this post I discuss the effects of coffee varieties, origin and processing on average extraction yield and brew time.

Posted byjgagneastroSeptember 5, 2020Posted inCoffee Processing, Coffee Varietals, Data Analysis, Extraction9 Comments on The Effects of Varieties, Origin and Processing

The Hardness of Green Coffee

In this post, I show that surface hardness might vary more than mass density across different green coffees.

Posted byjgagneastroNovember 23, 2019Posted inCoffee Processing, Coffee Varietals, Experiments, Physics, ToolsTags:Coffee roasting, Coffee science2 Comments on The Hardness of Green Coffee

What Affects Brew Time

In this post I discuss the variables that affect brew time in detail

Posted byjgagneastroOctober 20, 2019October 23, 2019Posted inBrew Methods, Coffee Processing, Coffee Varietals, Extraction, Maths, PhysicsTags:Coffee brewing, Coffee science20 Comments on What Affects Brew Time

How Coffee Varietals and Processing Affect Taste

In this post, I used tasting notes from 1500 bags of coffee too bring out how perceived flavor is affected by coffee varietal and processing

Posted byjgagneastroJuly 23, 2019September 2, 2019Posted inCoffee Processing, Coffee Varietals, Data Analysis, Tasting Notes25 Comments on How Coffee Varietals and Processing Affect Taste

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I'm happy to announce I have teamed up with @flairespressomaker and @weberworkshops for a nice giveaway this week; you can win a Flair 58 + Weber Workshops Unifilter along with my book :) follow the link in my bio to enter the giveaway !
I just published a new blog post on my Patreon (link in bio) about particle size distributions, with a discussion of how burr spacing, rpm, burr geometry affects them, and how to characterize different styles of particle size distributions. This is one of my most data heavy posts so far, thanks a ton to @weberworkshops for sharing their data.
I just posted a new blog post on my Patreon (link in bio) about my updated understanding of the mechanisms that I believe cause astringency in coffee, with hints about avenues we might use to reduce it. The post is immediately available on Patreon and will become publicly available in about 2 weeks !
@pullandpourcoffee created yet another awesome visual to convey some of my recent understandings of espresso physics ! I think this phenomenon has often been misconstrued as puck erosion or degradation, whereas this will happen in even the most well behaved espresso shots !
I will be teaching my second class on the physics of coffee during WOC Milan this summer ! The class will be on June 24, 8-11 AM in a beautiful room owned by @bwtglobal.
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