A brief history
This is a manual coffee preparation technique, similar to filter coffee. It was invented in 1941 by the German scientist Peter J. Schlumombohm and uses a distinctive carafe - a genuine design icon, which has even been displayed at MOMA in New York. The Chemex has an “Hour-glass” shape and there is a distinctive wooden ring tied with a leather thong to hold it by. It is made entirely of glass, which does not absorb tastes or aromas, and uses special conical filters made of highly absorbent paper.
- Medium/coarse ground coffee
- Range* 40-80 g/l
- RANGE: refers to the range that can be used for the quantity of coffee, which will vary according to personal taste and the type and roast of the coffee being used.
- Brew ratio* 1:15 recommended
- BREW RATIO: the relationship between the amount of coffee and the quantity of water used (eg: 1:15 = 60 g coffee per 900 ml water).
- Quantities for two cups:
- 20 g coffee for 300 ml water
- Chemex Triangular or
- square Chemex filters
- Electric kettle
- Professional grinder doser
- Mug (150-300 ml)
- Heat the water in the kettle to a temperature between 92 °C and 96 °C.
- Place the filter in the upper part of the jug, with the three layers on the side of the spout.
- Wet the filter with hot water and then remove the water from the Chemex. This step helps to remove any impurities or odours from the filter and also pre-heats the jug.
- Put the correct quantity of coffee in the centre of the paper filter.
- Pour some of the hot water on the coffee, about 10% of the water in the kettle, and wait 30 - 45 seconds. This stage is known as blooming or pre-infusion.
- Using a circular motion, slowly pour about 50% of the water in the kettle over the coffee, making sure to wet all the coffee grounds.
- Wait about a minute from the first pour, or until the water has completely filtered through, then pour the rest of the water over the coffee, once again with a slow, circular movement.
- When filtration is complete and the flow of coffee has slowed to a drip, remove the filter from the jug.
- Serve the coffee.