In this post, I compare several shots pulled with the Niche to others pulled with the EG-1 and SSP ultra-low-fines burrs.
Category Archives: Experiments
How a Paper Filter Below an Espresso Puck Affects Hydraulic Resistance
In one of my latest posts, I investigated the effect of puck preparation, and in particular the addition of a dry paper filter above the espresso puck, affects the hydraulic resistance of the system during an espresso shot. While I have not yet tested its effect on average extraction yield, I did not see anContinue reading “How a Paper Filter Below an Espresso Puck Affects Hydraulic Resistance”
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.
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.
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
The Struggle for a Steady Kettle Flow
In this post I discuss recent developments in my efforts to stabilize my kettle flow rate.
The Hardness of Green Coffee
In this post, I show that surface hardness might vary more than mass density across different green coffees.
An Investigation of Kettle Temperature Stability
In this post I investigate the stability of my Brewista kettle with the Brewcoat insulation and an additional layer of aerogel.
The Repeatability of Manual V60 Pour Overs
Today I decided to measure how repeatable and consistent my manual V60 pour overs are. My expectations were very low, given how variable an average extraction yield I often get when I brew the same coffee a few days apart. To do this, I used some older coffee I had left from a local roasterContinue reading “The Repeatability of Manual V60 Pour Overs”
Measuring the Concentration of Espresso Shots
If you are wondering why it is widely recommended to use syringe filters when you measure the concentration of espresso shots with a refractometer, or how bad exactly a measurement would be if you don’t use such a filter, I highly recommend this recent blog post by my friend Mitch Hale. And while you’re there,Continue reading “Measuring the Concentration of Espresso Shots”
