Processing Methods of Premium Coffee:
The processing of coffee beans involves several steps from harvesting the ripe cherries to the final dried beans ready for roasting. Firstly, What Does Processing Coffee Entail? In the simplest of terms, processing coffee just means removing the bean from the fruit. A few dominant methods of doing this have emerged over the years. The three main methods to process coffee are Natural (also called dry process), Washed (also called wet processed) and Honey (also called pulped natural). Here's a general overview of the typical coffee bean processing methods:
Harvesting: Coffee cherries are hand-picked when they are ripe, which ensures optimal flavor. In some regions, mechanical harvesting is used for large-scale production.
Sorting and Cleaning: The harvested cherries go through sorting machines to remove any unripe, overripe, or damaged cherries. They are also cleaned to eliminate any dirt, leaves, or twigs.
Depulping: The outer skin of the premium coffee cherry, known as the pulp, is removed. This can be done using either the wet or dry method.
Wet Method: The cherries are passed through a pulping machine that separates the skin and pulp from the premium coffee beans. The beans, still covered in a sticky layer called mucilage, are then fermented in water tanks for a specific period, usually 12–48 hours. Fermentation helps to remove the mucilage and can contribute to the flavor profile of the premium coffee.
Dry Method: In regions with low humidity, the cherries are spread out on large patios or raised beds to dry in the sun. They are raked regularly to ensure even drying. As the cherries dry, the skin, and pulp naturally separate from the beans.
Hulling: After drying, the whole coffee beans undergo hulling to remove the dried husk, parchment layer, and any remaining dry pulp. This process can be done mechanically or manually.
Sorting and Grading: The hulled whole coffee beans are sorted based on size, density, and quality. They may be separated into different grades, such as specialty, standard, or commercial, depending on the specific criteria set by the country or region.
Polishing (Optional): Some whole coffee beans go through a polishing step to remove any silver skin residue left after hulling. This process enhances the appearance of the beans but does not significantly affect their quality.
Packaging and Exporting: The processed whole coffee beans are packed in bags or containers for transportation to coffee roasters and exporters. Proper packaging is essential to maintain the freshness and quality of the beans during transit.