While a cold brew requires an average of 12 to 24 hours of infusion, German scientists have managed to prepare this tasty iced coffee in just three minutes, by developing a laser extraction method. A solution that they hope to market soon, before extending it to other drinks.
Extracted with a laser, this cold-brew coffee is prepared in three minutes
The scientists used a laser producing 80,000 pulses of 125 picojoules per second.
With several billion regular consumers, coffee ranks second among the most popular beverages on our planet, just behind water. Tight or long, with or without sugar, diluted with milk, depending on tastes, cultures, and morning mood, this simple pleasure can be declined indefinitely.
In recent years, caffeine junkies have been praising the merits of a beverage invented in Japan a few centuries ago: the cold brew.
Refreshing, less bitter, and less acidic, this preparation has everything to please, except for its infusion time. It is indeed necessary to wait between 12 and 24 hours so that the ground coffee diffuses all its aromas in cold water before finally being able to filter it and taste it.
Suffice it to say that this recipe is not suitable for the heads in the air, nor for the impatient who demand their daily energy shot immediately. Fortunately for them, a team of scientists from the German University of Duisburg and Essen claims to be able to considerably reduce this waiting time, thanks to an ultra-short pulse laser.