A recent study conducted by researchers at the University of Oregon in the United States revealed that adding a little water to coffee beans before grinding can make a significant difference in flavor and quality, according to a report published by CNN. Chemist Christopher Hendon, a co-author of the study, stated that grinding coffee with a small amount of water reduces the static electricity generated by the grinding process, leading to a better flavor and taste.
He explained, "Adding small amounts of water (ranging from a single drop or more) neutralizes or halts the static charges," noting that it is unclear what exactly water does to enhance the quality of taste and flavors. He added, "The droplets might absorb the charge or alter the temperature inside the grinder, which reduces the friction effects between the coffee beans."
Hendon emphasized that if a sufficient amount of water is added during the grinding process, it prevents clumping, which, in principle, results in obtaining larger amounts of liquid coffee and thus a better drink. He recommended that those who grind coffee at home start by experimenting with a single drop of water and gradually increase it to achieve the best flavor.
In comments on the study, coffee expert Lance Hendricks, who did not participate in the research, stated that "the recent research is a brave attempt to demystify what happens when coffee beans are misted with water." According to the study, the amount of water added can depend on several factors, such as the roasting type (light, medium, or dark) and the coarseness or fineness of the grind, confirming that there is no single rule that suits everyone's tastes.
The study confirmed that adding water increases productivity by 10%. It is noted that many coffee makers in restaurants and cafes are accustomed to adding drops of water with the coffee beans to prevent dust from spreading and exiting the grinder, but according to the study, this also improves the taste of the coffee.
