The Coffee Kits

The Science Behind Chemex Pourover: Understanding the Extraction Process

Chemex pour over is a popular brewing method among coffee lovers. It is a simple yet sophisticated process that requires patience, precision, and a bit of science. In this article, we will explore the science behind Chemex pour over and understand the extraction process.

What is Chemex Pourover?

Chemex pour over is a manual brewing method that uses a glass vessel, a special filter, and ground coffee to make a delicious cup of coffee. The process involves pouring hot water over the coffee grounds in a circular motion, allowing the water to extract the coffee flavors and aromas. The resulting coffee is smooth, clean, and flavorful.

The Science of Extraction

The extraction process is the most critical aspect of coffee brewing. It involves dissolving the coffee solids and oils in water to create a flavorful and aromatic cup of coffee. The extraction process is affected by several factors, including water temperature, coffee grind size, and brewing time.

Water Temperature

The water temperature is crucial in the extraction process. The ideal water temperature for coffee brewing is between 195°F and 205°F. If the water is too hot, it will over-extract the coffee, resulting in a bitter and unpleasant taste. If the water is too cold, it will under-extract the coffee, resulting in a weak and flavorless cup of coffee.

Coffee Grind Size

The coffee grind size also affects the extraction process. The ideal grind size for Chemex pour over is medium-coarse. If the grind size is too fine, the water will have a hard time passing through the coffee grounds, resulting in an over-extracted coffee. If the grind size is too coarse, the water will pass through the coffee grounds too quickly, resulting in an under-extracted coffee.

Brewing Time

The brewing time is the amount of time that the water and coffee grounds are in contact with each other. The ideal brewing time for Chemex pour over is 3-4 minutes. If the brewing time is too short, the coffee will be under-extracted. If the brewing time is too long, the coffee will be over-extracted.

The Chemex Pourover Process

Now that we understand the science behind the extraction process let's look at the step-by-step process of making Chemex pour over.

Step 1: Boil Water

Boil water and let it cool for a minute or two until it reaches the ideal temperature of 195°F to 205°F.

Step 2: Grind Coffee

Grind coffee beans to a medium-coarse grind size and place them in the Chemex filter.

Step 3: Wet the Filter

Pour hot water over the filter to wet it and remove any paper taste.

Step 4: Add Coffee

Add the ground coffee to the filter and level it out.

Step 5: Pour Water

Pour hot water over the coffee grounds in a circular motion, making sure to saturate all the grounds.

Step 6: Wait

Wait for 3-4 minutes until the coffee is fully extracted.

Step 7: Enjoy

Pour the coffee into a cup and enjoy your delicious Chemex pour over.

Conclusion

Chemex pour over is a simple yet sophisticated brewing method that requires a bit of science to make the perfect cup of coffee. Understanding the extraction process and its factors, such as water temperature, coffee grind size, and brewing time, is crucial in making a delicious cup of Chemex pour over. So the next time you brew a cup of coffee, remember the science behind it and enjoy your perfect cup of Chemex pour over.