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Author Archives: jgagneastro

The Four Rules of Optimal Coffee Percolation

In this post, I lay down four rules for optimal percolation that follow some of my most recent understanding about percolation physics.

Posted byjgagneastroMarch 4, 2021Posted inPhysics, RecipesLeave a comment on The Four Rules of Optimal Coffee Percolation

A Study of Espresso Puck Resistance and How Puck Preparation Affects it

In this post, I present an experiment showing that deep WDT helps improve repeatability, and I discuss how to improve espresso preinfusion.

Posted byjgagneastroJanuary 16, 2021February 7, 2021Posted inData Analysis, Espresso, Experiments, Physics3 Comments on A Study of Espresso Puck Resistance and How Puck Preparation Affects it

An Espresso Profile that Adapts to your Grind Size

In this blog post, I explore the possibility of a different way to profile espresso shots with the Decent machine to help dialing in faster.

Posted byjgagneastroDecember 31, 2020Posted inEspresso, Physics, Recipes2 Comments on An Espresso Profile that Adapts to your Grind Size

Brewing with the Fellow Stagg [X] Dripper

In this post, I review why I completely switched from the V60 to the Stagg [X] brewer, and how I now use it.

Posted byjgagneastroDecember 9, 2020December 9, 2020Posted inBrew Methods, Coffee Filters, Recipes, V60 Brews7 Comments on Brewing with the Fellow Stagg [X] Dripper

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 Physics of Kettle Streams

In this post, I discuss the physics of kettle stream and how we can maximize extraction evenness by changing pour rate and height.

Posted byjgagneastroMay 23, 2020Posted inBrew Methods, Experiments, Extraction, Kettles, Physics7 Comments on The Physics of Kettle Streams

Why Can’t we Grind Coffee Finer for Pour Over ?

In this post, I discuss issues and possible avenues for grinding finer for filter coffee

Posted byjgagneastroApril 2, 2020Posted inBrew Methods, Experiments, Extraction, Particle Size Distribution, V60 Brews13 Comments on Why Can’t we Grind Coffee Finer for Pour Over ?

Measuring Brew Water Properties

This post describes some available tools for measuring water properties relevant to coffee and presents ways and a web tool to hack aquarium kits for a better precision.

Posted byjgagneastroFebruary 25, 2020Posted inChemistry, Tools, Water for CoffeeTags:Water Chemistry, Water for Coffee3 Comments on Measuring Brew Water Properties

The Physics of Fines Migration

In this post, I explore the details of physical phenomena that can cause fines to migrate and clog coffee filters.

Posted byjgagneastroFebruary 1, 2020January 31, 2020Posted inExtraction, Particle Size Distribution, Physics, V60 BrewsTags:Coffee brewing, Coffee Filters, Coffee geeks, Coffee science, Fines Migration3 Comments on The Physics of Fines Migration

The Struggle for a Steady Kettle Flow

In this post I discuss recent developments in my efforts to stabilize my kettle flow rate.

Posted byjgagneastroJanuary 2, 2020April 16, 2020Posted inBrew Methods, Brew Temperature, Experiments, Tools, V60 BrewsTags:Flow Restrictor, Kettle Flow17 Comments on The Struggle for a Steady Kettle Flow

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