A Simple Method to Measure Coffee Colloids
Description
This project started with the intention of quantifying the differences between coffees brewed by various methods. The result is a novel technique for measuring colloids and a theoretical explanation of why and how it works. It also provides practical details about the use of the Raspberry Pi High Quality camera for data gathering.
Details
What's a colloid?
Colloids are particles which are larger than molecules but are small enough that they stay dispersed in the coffee. They scatter light. When you shine a laser through a colloid dispersion, you can see the light beam.
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Do colloids matter for coffee?
Colloids and acids are two things that change depending on the brewing method.
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One major purpose of Traditional Cupping is to greatly enhance Brew Colloid formation, so that the broader spectrum of a coffees flavour can be perceived.
How does this project work?
We shine a laser through diluted coffee and take a picture of the resulting light beam. By analyzing the picture, we can tell how much light reaches the camera from each point along the light beam.
Results
