When we talk about coffee, we usually think about altitude, variety, process and roasting… but there is a silent factor that also defines its character: light.
Light: the engine of photosynthesis. Sunlight is the energy that the coffee plant needs to perform photosynthesis, the process that transforms light into nutrients to grow, flower, and produce fruit.
Lots of direct sunlight: accelerates growth, but can cause water stress and less complex flavor in the fruit.
Moderate or filtered light: promotes slower ripening, which usually results in coffees with greater sweetness and aromatic complexity.
Beyond cultivation: light in post-harvest. After harvesting, light also plays an important role in coffee drying. Controlled sun exposure helps develop clean and balanced profiles, while drying that is too fast or uncontrolled can lead to cup defects.
Photodegradation: Prolonged exposure to light (especially direct sunlight and UV rays) breaks down the chemical compounds in roasted coffee. This process, known as photodegradation, causes a significant loss of aroma and flavor, making the coffee go rancid more quickly.
Oxidation: Light accelerates the oxidation process of the fats present in coffee. This produces an unpleasant taste and changes in aroma and color.
Nutrient degradation: Light can also degrade vitamins and other essential nutrients, decreasing the nutritional value of coffee.
Odor absorption: Roasted coffee is porous and has the ability to absorb unwanted odors and flavors from the environment, including those generated by light breaking down other materials.
To protect coffee from the negative effects of light during storage, it is crucial to:
- Store it in a dark place: Away from direct sunlight and intense artificial light sources.
Use opaque and airtight containers: Materials such as aluminum or metallized films in flexible packaging effectively block the entry of light and UV rays, as well as preventing the entry of oxygen and moisture. - Avoid transparent packaging: Although aesthetically pleasing, it allows light to quickly deteriorate the quality of the coffee.
Properly storing it means honoring the producer's effort and ensuring that each cup retains its aroma, flavor, and freshness. Because great coffee isn't just made... it's cared for.
