Coffee Data Science
Particle Distribution Per Coffee Bean
Seeing the beans for the grinds
When we look at coffee particle distributions for coffee grinds, they are really like measuring temperature in the sense that we’re measuring the average over multiple samples. To better understand how much a coffee distribution varies bean to bean, we can sample just a few beans and compare their distributions.
To do this, I used a ROK grinder so that I could quickly clean out the grinder between beans.
Here is a sample of grinds on a piece of paper used to calculate grind distribution.
I looked at 5 individual beans and then the combination of all of them. There isn’t much variation aside from one of the beans.
Another way to view this data is to look at the minimum and maximum for each particle diameter based on the cumulative curves. They all seem pretty close until 300um.
This quick test verified that particle distribution can vary based on bean, but they were not wildly different.
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Further readings of mine:
Collection of Espresso Articles
A Collection of Work and School Stories
Measuring Coffee Grind Particle Distribution using Image Processing
A Summary of the Staccato Lifestyle
Measuring Coffee Grind Distribution
Espresso Baskets and Related Topics