I come back to my last experiment and explore whether the difference in gravimetric vs volumetric flow could be due to changing shot TDS.
Category Archives: Experiments
A Comparison between Standard and Low-Fines Espresso Shots
In this post, I compare several shots pulled with the Niche to others pulled with the EG-1 and SSP ultra-low-fines burrs.
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”
Coffee ad Astra 